Book Details
Entitled water treatment device and water treatment method
Technical field
[0001]
　The present invention relates to a water treatment device and water treatment method, for example, it relates to a water treatment apparatus and water treatment method with a filtration unit for filtering water to be treated.
Background technique
[0002]
　Conventionally, reverse osmosis membrane (RO membrane: Reverse Osmosis Membrane) seawater was filtered desalination apparatus for obtaining fresh water are used in. In such a desalination apparatus by filtering the suspended solid was poured and coagulant seawater before filtering a reverse osmosis membrane, the degradation in performance of the reverse osmosis membrane by contaminants contained in seawater It is prevented. In such desalination apparatus using a reverse osmosis membrane, a technique for operation control using SDI the (Silt Density Index) value as the water quality evaluation index value as an index for evaluating the quality of seawater filtering a reverse osmosis membrane There has been proposed (e.g., refer to Patent documents 1 to 3).
CITATION
Patent Document
[0003]
Patent Document 1: JP Patent No. 2755182
Patent Document 2: JP Patent No. 4666600
Patent Document 3: Laid-Open Patent Publication No. 2006-55818
Summary of the Invention
Problems that the Invention is to Solve
[0004]
　Incidentally, in the water treatment apparatus using a reverse osmosis membrane sea water before filtration has high concentrations of pollutants, the water quality evaluation index such as SDI value may not be the proper quality evaluation. Thus, the contaminants in the filtering device to measure the SDI value of seawater after filtration and adjusted to the amount of coagulant to be introduced into the filtration apparatus is filtered through a reverse osmosis membrane based on the SDI value of the measured seawater the quality of seawater is kept at a predetermined reference range.
[0005]
　However, when keeping to measure the quality of seawater was filtered through a filter device the water quality of seawater within the predetermined reference range, when the sea water water quality deviates from the reference range, coagulant to be introduced to the filtration device too late operation of reducing the pollutants, such as bulking is, or reverse osmosis membrane is fouled, there is a case where such stop of the operation of the water treatment apparatus is needed.
[0006]
　The present invention has been made in view of such circumstances, a significant water quality of the water to be treated before the filtration treatment becomes possible, quickly adaptable water treatment device and water quality change of the water to be treated and to provide a processing method.
Means for Solving the Problems
[0007]
　Water treatment apparatus of the present invention is provided in the treatment water filtration unit for a filtered water and filtered water to be treated supplied from the treated water line, the treated water drainage unloading line branched from said treated water line the preprocessing unit to reduce the contaminants concentration in the treated water to be treated draining unloading line and the sample water, provided at the subsequent stage of the pre-processing unit in the treated water drain unloading lines, the measured water a first water quality measurement part for the water quality by measuring and evaluating the quality of the water to be treated, characterized by comprising a.
[0008]
　According to the water treatment apparatus, since the measured quality, allows significant water quality that reflects the quality of the water to be treated before filtration treatment with the sample water with a reduced turbidity concentration of the water to be treated . Thus, the water treatment apparatus, it is possible to quickly change the filtering conditions of the water to be treated is filtered part with respect to changes in water quality of the water to be treated, it is possible to stabilize the quality of the filtered water.
[0009]
　In the water treatment apparatus of the present invention is preferably provided with a reverse osmosis membrane filtration unit to permeate and retentate the filtered water filtered by the reverse osmosis membrane. This configuration makes it possible to quickly change the filtering conditions of the water to be treated is filtered part with respect to changes in water quality of the water to be treated, it is possible to stabilize the quality of the filtered water to prevent fouling of the reverse osmosis membrane it becomes possible.
[0010]
　In the water treatment apparatus of the present invention, the pre-processing unit is preferably by mixing the water to be treated and the filtered water is filtered water mixing unit to the measured water. By this configuration, the measured water contaminants concentration by simply mixing the water to be treated and filtered water is reduced can be obtained, can be conveniently prepared the sample water.
[0011]
　In the water treatment apparatus of the present invention, the measured water, the be said for-treatment water as water to be treated becomes 60 vol% 5 vol% or more less and the filtered water is formed by mixing preferable. By this configuration, the suspended solid concentration of the sample water is an appropriate range, it is possible to more significant water quality of the water to be treated before filtration treatment using the sample water.
[0012]
　In the water treatment apparatus of the present invention, the pre-processing unit, that the a solid-liquid separation portion in which the liquid in the water to be treated by solid-liquid separation and turbidity of the treatment water and the measured water preferable. By this configuration, the measured water contaminants concentration simply by solid-liquid separation treatment water is reduced can be obtained, can be conveniently prepared the sample water.
[0013]
　In the water treatment apparatus of the present invention, the solid-liquid separation unit is preferably the separation efficiency of the turbidity is 60% or more. By this configuration, the suspended solid concentration of the sample water is an appropriate range, it is possible to more significant water quality measurement of the water to be treated before filtration treatment using the sample water.
[0014]
　In the water treatment apparatus of the present invention, the pretreatment unit, the certain sand filtration unit to the measured water the water to be treated by a relatively filtration rate is fast sand filter water to be treated is filtered section it is preferable. With this configuration, since the sample water which suspended solid concentration is reduced by the filtration treatment promptly treated water is obtained, it is possible to easily prepare the sample water.
[0015]
　In the water treatment apparatus of the present invention, the pre-processing unit, it is preferable that the a treated water purification unit to the measured water to reduce the contaminants in the water to be treated by bubbling. With this configuration, since the sample water which suspended solid concentration is reduced only by performing bubbling is obtained, can be conveniently prepared the sample water.
[0016]
　In the water treatment apparatus of the present invention, the a coagulant supplying portion to introduce an aggregating agent to the water to be treated, and a second water measurement unit for measuring the quality of the filtered water was evaluated in the first quality measuring section the it is preferable that a control unit for controlling the input of the coagulant based on the water quality of the filtered water was measured by the water quality and the second quality measurement part of the water to be treated. With this configuration, since the control input of coagulant, based on the quality of the treatment water measured in the sample water, to control the dosage of rapidly aggregating agent to changes in water quality of the water to be treated, the failure of the reverse osmosis membrane caused by changes in the quality of the measurement water can be prevented. Since it corrects the input amount of the coagulant based on the quality measured in filtered water, it is possible to prevent the introduction of excess coagulant.
[0017]
　Water treatment method of the present invention, by measuring the steps of the the sample water to reduce the contaminants concentration in the treated water to be treated draining unloading line branched from the treated water line, the quality of the measured water the filtering and evaluating the quality of the water to be treated, and controlling the charging amount of the aggregating agent to the treatment water on the basis of the quality of the water to be treated and evaluated, the treatment water of the water to be treated line characterized in that by measuring the quality of the filtered water that includes a step of controlling the charging amount of the aggregating agent to the water to be treated.
[0018]
　According to this method, since the control input of coagulant, based on the quality of the treatment water measured in the sample water, to control the dosage of rapidly aggregating agent to changes in water quality of the water to be treated , it is possible to prevent malfunction of the reverse osmosis membrane caused by changes in the quality of the sample water. Since it corrects the input amount of the coagulant based on the quality measured in filtered water, it is possible to prevent the introduction of excess coagulant.
Effect of the Invention
[0019]
　According to the present invention enables a significant water quality of the water to be treated before filtration process can be realized quickly adaptable water treatment device and water treatment method to changes in water quality of the water to be treated.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020]
[1] Figure 1 is a schematic diagram of a water treatment apparatus according to a first embodiment of the present invention.
FIG. 2 is a graph showing the relationship between the concentration and the SDI value of the water to be treated in water to be measured.
FIG. 3 is a graph showing the relationship between the concentration and the SFF value of the water to be treated in water to be measured.
[4] FIG. 4 is a schematic diagram of a water treatment apparatus according to a second embodiment of the present invention.
FIG. 5 is a schematic diagram of a water treatment apparatus according to a third embodiment of the present invention.
FIG. 6 is a schematic diagram of a water treatment apparatus according to a fourth embodiment of the present invention.
[7] FIG. 7 is a schematic diagram of a water treatment apparatus according to a fifth embodiment of the present invention.
[8] FIG. 8 is a flow diagram of a water treatment method according to the fifth embodiment of the present invention.
[9] FIG. 9 is a schematic diagram of a water treatment apparatus according to a sixth embodiment of the present invention.
[10] FIG 10 is a schematic diagram of a water treatment apparatus according to a seventh embodiment of the present invention.
[11] FIG 11 is a schematic diagram of a water treatment apparatus according to the eighth embodiment of the present invention.
DESCRIPTION OF THE INVENTION
[0021]
　The present inventors have found that in a conventional seawater desalination apparatus for desalination can not measure the water quality evaluation index value proper seawater in turbidity concentration is high seawater, with filtered water after filtration by noting that the operation control of the desalination apparatus by measuring the SDI value each. Then, the present inventors have found that by using the seawater to reduce contaminants concentration by performing predetermined preprocessing on seawater before filtration process, measuring the water quality evaluation index value of seawater using seawater before filtration it becomes possible to, thereby, it found that by detecting the changes in water quality of the sea water at an early stage can be stabilized quality of filtered water, and completed the present invention.
[0022]
　Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is not intended to be limited to the following embodiments can be implemented by appropriate modifications. Further, the following embodiments can be implemented in appropriate combination. Further, component elements corresponding to those in each embodiment are denoted by the same reference numerals to avoid duplication of description.
[0023]
(First Embodiment)
　FIG. 1 is a schematic diagram of a water treatment apparatus according to a first embodiment of the present invention. As shown in FIG. 1, the water treatment device 1 according to this embodiment, water to be treated W 1 filtered water W obtained by filtration in the treatment water filtration unit 11 2 , and the reverse osmosis membrane filtration unit 12 permeate W by filtration through a reverse osmosis membrane 12a 3 and concentrate W 4 is a water treatment apparatus to obtain. The water to be treated W 1 is not particularly limited and for example, sea water, river water, lake water, ground water, urban sewage, brackish, industrial water, and industrial waste water, as well as aggregation of these water, precipitation, filtration, adsorption , and the like can be used water which has been subjected to treatment such as biological treatment.
[0024]
　Water treatment device 1 according to this embodiment, the treated water line L 1 water to be treated W from 1 water to be treated a filtration unit 11 is supplied, the subsequent filtrate line L of the water to be treated is filtered 11 2 the reverse osmosis membrane filtration unit 12 provided, downstream of the concentrated water line L of the reverse osmosis membrane filtration unit 12 3 and the energy recovery unit 13 provided in the water to be treated line L 1 is branched from the water to be treated W 1 treated drainage unloading line L withdrawing a portion of 4 filtered water mixing unit provided with (pre-processing unit) 14, water quality measuring unit provided downstream of the filtered water mixing unit 14 (first quality measuring section) It includes a 15, a.
[0025]
　The water to be treated filtration unit 11, the treated water line L by the liquid feed pump 16 1 water to be treated W from 1 is supplied. Treatment water filtration unit 11, the water to be treated W 1 treatment water W by filtration 1 filtered water W contaminants in is removed 2 to. The treated water filtration unit 11, for example, silica sand anthracite (anthracite) and small particle size of Sotsubu径are stacked, dual media filter gradually particle size becomes finer toward the lower layer (DMF: Dual Media Fileter) it can be used.
[0026]
　The treated water filtration unit 11, the filtered water W 2 pH of a predetermined value (e.g., pH 7.2 or less) so that, if necessary H 2 SO 4 is adjusted by an acid such as, HCl. By thus adjusting the pH, the water to be treated W 1 can be reduced defects such as reverse osmosis membranes 12a fouling of the reverse osmosis membrane filtration apparatus 12 according to turbidity in (fouling).
[0027]
　The reverse osmosis membrane filtration unit 12, the filtered water line L by a high-pressure pump 17 2 filtered water W pressurized from 2 is supplied. Reverse osmosis membrane filtration unit 12, the filtered water W supplied from the water to be treated is filtered 11 2 permeate W passes through the 3 with the water to be treated W 1 concentrated water W such as salinity in enriched 4 includes a reverse osmosis membrane 12a to. Reverse osmosis membrane filtration unit 12, the concentrated water W 4 concentrated water line L 3 as well as discharged from the permeate W 3 the permeate line L 5 is discharged from.
[0028]
　It may further be provided a filter member such as a micro cartridge filter between the water to be treated filtration section 11 and the reverse osmosis membrane filtration unit 12. Filtered water W 2 by passed through the filter member, it is possible to remove fine particles that affect the fouling of the reverse osmosis membrane 12a of the reverse osmosis membrane filtration unit 12.
[0029]
　Filtered water line L between the water to be treated filtration section 11 and the reverse osmosis membrane filtration unit 12 2 between the filtered water mixing unit 14, the filtered water W 2 filtered water supply for supplying the filtered water mixing unit 14 line L 6 is provided. Incidentally, the filtered water supply line L 6 in may be provided with a filter member as required.
[0030]
　Energy recovery unit 13, the high-pressure concentrated water W of pressurized by the high pressure pump 17 4 to recover the energy of. The recovered energy energy recovery unit 13, for example, energy and filtered water W to drive the high-pressure pump 17 2 is used for energy to pressure transducer to pressure. Thus, the water treatment device 1 can improve the energy efficiency of the entire water treatment apparatus 1.
[0031]
　The energy recovery unit 13, for example, PeltonWheel type energy recovery apparatus, Turbochager type energy recovery apparatus, PX (Pressure Exchanger) type energy recovery apparatus, and DWEER the like can be used (DualWorkEnergy Exchanger) type energy recovery apparatus.
[0032]
　Filtered water mixing unit 14, the treatment water line L 1 to be treated drainage unloading line L branched from 4 treatment water W withdrawn from 1 and filtered water supply line L 6 filtered water W supplied from the 2 and mixing the sample water W contaminants concentration is reduced by 5 to. The sample water W obtained in filtered water mixing unit 14 5 is fed to the water quality measurement unit 15.
[0033]
　Water measurement unit 15, the sample water W 5 by measuring the water quality of the calculated water quality evaluation index value, the water to be treated W based on the calculated quality evaluation index value 1 to evaluate the water quality. The water quality evaluation index value, for example, SDI (Silt Density Index) value, and SFF (Soluble Fouling Factor) values, and the like. The SDI value is a value measured by a method specified in ASTM D4189-95. SDI values, using the mesh opening 0.45μm filter paper treated water W 1 was filtered of, seeking time to filter a predetermined quantity water to be treated W 1 for measuring the pollutant amount. SFF value is measured based on the measuring method as described in, Japanese Patent No. 4931039 Publication.
[0034]
　Here, with reference to FIGS. 2 and 3, the sample water W 5 treatment water W in 1 ratio and the measured water W 1 will be described the relationship between the measured value of water quality evaluation index values. 2, the sample water W 5 treatment water W in 1 is a diagram showing the relationship between the ratio and the SDI value, FIG. 3, the sample water W 5 treatment water W in 1 ratio and SFF is a diagram showing the relationship between the value. In FIG. 2, the horizontal axis the measured water W 5 treatment water W in 1 the ratio of the vertical axis filtrate W 2 the sample water W in the case where the SDI value was 1.0 5 It shows the ratio of SDI value. Further, in FIG. 2, the horizontal axis the measured water W 5 treatment water W in 1 the ratio of the vertical axis filtrate W 2 the sample water W in the case of the SFF value was 1.0 5 It shows the ratio of SDI value.
[0035]
　As shown in FIG. 2, the sample water W 5 treatment water W in 1 small reduction rate of the SDI value in a range of the following 60 vol% greater than 100% by volume (see the dashed line L1), the water to be treated W 1 filtered water W 2 can be seen the effect is small to reduce the suspended solid concentration and diluted with. Therefore, the water to be treated W 1 filtered water W below 40 vol% 0 vol% or more with respect to 2 is only added it is difficult to measure the SDI value. In contrast, the sample water W 5 treatment water W in the total volume of 1 is the reduction rate of SDI value is increased in the range of 5 vol% to 60 vol% or less (see dashed line L2), 5 vol% or reduction rate of the SDI values it can be seen that further increases in the range of 30 vol% or less (see one-dot chain line L3). Thus, the water to be treated W 1 treatment water W to SDI value is measurable range in the range of 40 vol% to 95 vol% based on the total volume of 1 filtered water W 2 by dilution with, the treated water W 1 quality of the sample water W reflecting the 5 possible adjustment.
[0036]
　As shown in FIG. 3, the sample water W 5 treatment water W in the total volume of 1 (see the chain line L4 line) reduction rate small SFF value in a range of the following 60 vol% greater than 100 vol%, the treated water W 1 filtered water W 2 can be seen the effect of dilution with small. Thus, the water to be treated W 1 filtered water W below 40 vol% 0 vol% or more based on the total volume of 2 only added, it is difficult to measure the SFF value. In contrast, the sample water W 5 treatment water W in the total volume of 1 is in the range of 5 vol% to 60 vol% increases the reduction rate of the SFF value (see the dashed line L5), 5 vol% above it can be seen that the reduction rate of the SFF value is further increased in the range of 30 vol% or less (see the dashed line L6). Thus, the water to be treated W 1 treatment water W to SFF value in the range of 95 vol% 40 vol% or more is possible measuring range 1 filtered water W 2 by diluting with water to be treated W 1 of water quality to be measured water W reflects 5 can be adjusted.
[0037]
　Treatment water W in the filtered water mixing unit 14 1 and the filtered water W 2 the mixing ratio of the measured water W 5 contaminants concentration becomes an appropriate range, the sample water W 5 before filtration treatment with the water to be treated W 1 from the viewpoint of even more significant water quality evaluation is made possible, the sample water W 5 water to be treated W during 1 is preferably a ratio of at most 5 vol% to 60 vol%, 5 vol % or more and more preferably 30 vol% or less. The sample water W 5 water to be treated W during 1 if the ratio of 5% by volume or more, the sample water W 5 is the water to be treated W 1 tend to reflect the water quality, also if 60 vol% or less , the water to be treated W of quality evaluation index values 1 sensitivity increases for dilution rate of the water to be treated W 1 can measure the water quality evaluation index value that reflects the water quality.
[0038]
　Control unit 18, the processed draining unloading line L 4 valve V provided in the 1 and opening of the filtered water supply line L 6 valve V provided in the 2 to control the opening of. Control unit 18, the measurement result to the valve V based water quality evaluation index value of water quality measurement unit 15 1 , V 2 of controlling the opening degree the sample water W 5 treatment water W in 1 adjusts the ratio of to. Control unit 18, when the measured value of water quality evaluation index value of water quality measurement unit 15 is too high, valve V 1 or valve V to reduce the opening of the 2 degree greatly to the sample water W of 5 filtered water W in 2 the ratio of increase. The control unit 18, the water quality measurement part 15 to measure the water quality evaluation index value the water to be treated W 1 when the water quality is not reflected, the valve V 1 or valve V to increase the degree of opening of 2 of and decreases the opening the sample water W 5 filtered water W in 2 reduces the ratio of.
[0039]
　Next, a description will be given of the overall operation of the water treatment apparatus 1 according to this embodiment. Treated water line L by the liquid feed pump 16 1 treatment water supplied from W 1 is the filtered water W filtered with water to be treated is filtered 11 2 together with the A part of the treated water drainage unloading line L 4 It is withdrawn to. Filtered water W 2 , after being passed through the filter member (not shown), it permeated water W are filtered by the reverse osmosis membrane filtration unit 12 is pressurized by the high pressure pump 17 3 and concentrate W 4 becomes. Concentrated water W pressurized by the high pressure pump 17 4 , the energy is recovered by the energy recovery unit 13. This energy is used to a driving of the high pressure pump 17.
[0040]
　Filtered water W 2 portion of the filtered water supply line L 6 through with filtered water mixing unit 14 the water to be treated W 1 measured water W are mixed with 5 becomes. The measured water W 5 is water is measured by the quality measuring unit 15, the water to be treated W 1 of water quality is evaluated. Thus the water to be treated W 1 and the filtered water W 2 by mixing in a predetermined ratio, water to be treated W 1 can be obtained a water quality evaluation index values of the water is reflected, the water to be treated W 1 a water treatment device 1 can be appropriately operation management in response to changes in water quality. The sample water after the water quality has been measured by the quality measuring unit 15 5 is drained W 6 is discharged as.
[0041]
　As described above, according to the water treatment device 1 according to this embodiment, the water to be treated W 1 and filtered water W 2 by mixing the water to be treated W 1 the sample water with a reduced turbidity concentration W 5 since measuring the water quality by using water to be treated W 1 it is possible to obtain a water quality evaluation index value that reflects the water quality. Thus, the water treatment device 1, water to be treated W 1 it is possible to quickly change and filtration conditions to be treated water filtration unit 11 with respect to changes in water quality of the filtered water W 2 to stabilize the quality of it becomes possible.
[0042]
　In the embodiment described above has been described an example in which an energy recovery unit 13 downstream of the reverse osmosis membrane filtration unit 12, the energy recovery unit 13 is not necessarily provided. Incidentally, the energy recovery unit 13 may be provided as necessary.
[0043]
　Further, in the embodiment described above, the filtered water supply line L 6 by filtered water W 2 of the portion of the water to be treated W 1 and mixed to the water to be treated W 1 measured water W having a reduced turbidity concentration 5 an example is described of adjusting the water to be treated W 1 filtered water W is mixed with 2 as the permeate W 3 and concentrate W 4 may be used a part of. Filtered water W 2 concentrated water W in place of the 4 measured water W using a 5 by adjusting the permeate W 3 production efficiency is improved.
[0044]
(Second Embodiment)
　Next explained is the second embodiment of the present invention. In the following, the description will focus on differences from the first embodiment described above, avoid duplication of description.
[0045]
　Figure 4 is a schematic diagram of a water treatment apparatus 2 according to a second embodiment of the present invention. As shown in FIG. 4, the water treatment apparatus 2 according to the present embodiment, filtered water supply line L of the water treatment device 1 according to the first embodiment described above 6 is not provided, also filtered water solid-liquid separating section instead of the mixing unit 14 comprises a (pre-processing unit) 19. The solid-liquid separation unit 19 includes, for example, a liquid cyclone having a cylindrical container. The solid-liquid separator 19, the water to be treated W containing contaminants number μm or more fine particles in a cylindrical vessel 1 by exerting a centrifugal force causing the rotation luck degree to supply, the suspended solid it is intended to sediment separation and concentration. That is, the water treatment apparatus 2 according to this embodiment, water to be treated W 1 a part of the treated water drainage unloading line L 4 treatment water W by solid-liquid separation unit 19 extracts from 1 solid-liquid and contaminants from the by reducing the suspended solid concentrations was separated, the water to be treated W 1 measured water W of water is reflected 5 is to adjust.
[0046]
　The solid-liquid separator 19, the water to be treated W 1 as the separation efficiency of the turbid medium concentration in is 60% or more is preferable. Thus, the sample water W 5 because contaminants concentration is proper range, the sample water W 5 water to be treated W before filtration treatment with 1 it is possible to more significant water quality measurements.
[0047]
　Next, a description will be given of the overall operation of the water treatment apparatus 2 according to the present embodiment. Treated water line L by the liquid feed pump 16 1 water to be treated W was supplied from the 1 is the filtered water W filtered with water to be treated is filtered 11 2 together with the A part of the treated water drainage unloading L 4 in It is withdrawn. Treated draining unloading L 4 treatment water W withdrawn to 1 , the suspended solid concentration contaminants is separated in solid-liquid separator 19 is the sample water W is adjusted to a predetermined range 5 becomes. The measured water W 5 is water is measured by the quality measurement unit 15. Treatment water W separated in the solid-liquid separation unit 19 contaminants are concentrated 1 is drained W 7 is discharged as.
[0048]
　As described above, according to the water treatment apparatus 2 according to this embodiment, the water to be treated W in solid-liquid separation by the solid-liquid separation unit 19 1 the sample water W with reduced turbidity concentration of 5 using since measuring the water quality, the water to be treated W 1 can be obtained conveniently water quality evaluation index value that reflects the water quality. Thus, the water treatment device 2, the water to be treated W 1 it is possible to quickly change the filtering conditions of the water to be treated filtering part 11 with respect to changes in water quality of the filtered water W 2 to stabilize the quality of it is possible.
[0049]
　In the embodiment described above, description has been made of an example of using the hydrocyclone as a solid-liquid separating section 19, the solid-liquid separating section 19 is not limited to a hydrocyclone. The solid-liquid separator 19, the water to be treated W 1 measured water W by separating the contaminants and the liquid in the 5 as long as it is obtained, is applicable to various types of solid-liquid separator.
[0050]
(Third Embodiment)
　Next explained is the third embodiment of the present invention. In the following, the description will focus on differences from the second embodiment described above, avoid duplication of description.
[0051]
　Figure 5 is a schematic diagram of a water treatment apparatus 3 according to a third embodiment of the present invention. As shown in FIG. 5, water treatment apparatus 3 according to the present embodiment, sand filtration unit in place of the solid-liquid separating section 19 of the water treatment apparatus 2 according to the second embodiment described above (pretreatment unit) equipped with a 20. The sand filter unit 20, the processed draining unloading line L 4 water to be treated W was extracted in 1 to contaminants of reducing by sand filtration. The sand filter 20, the filtration performance is sand filtration apparatus of relatively low small with respect to the for-treatment water filtration unit 11, to enable filtration faster than the treated water filtration unit 11. Thus, the water to be treated W 1 measured water W contaminants has been reduced by rapid filtration 5 it is possible to adjust the water to be treated W 1 measured water W in the water quality is reflected 5 the It can be obtained quickly.
[0052]
　The sand filter unit 20, it is preferable the filtration performance is 95% or less 40% with respect to the for-treatment water filtration unit 11. Sand filtration unit 20, if the filtering performance of 40% or more water to be treated filtration section 11, the water to be treated W 1 it is possible to measure water quality evaluation index value that reflects the water quality. Also, sand filtration unit 20, if the filtration performance to 95% of the treated water filtration unit 11, the sample water W 5 it is possible to quickly obtain.
[0053]
　Next, a description will be given of the overall operation of the water treatment apparatus 3 according to this embodiment. Treated water line L by the liquid feed pump 16 1 water to be treated W was supplied from the 1 is the filtered water W filtered with water to be treated is filtered 11 2 together with the A part of the treated water drainage unloading L 4 in It is withdrawn. Treated draining unloading L 4 treatment water W withdrawn to 1 , the suspended solid concentration measured water W is adjusted to a predetermined range of sand filtration unit 20 contaminants are separated 5 becomes. The measured water W 5 is water is measured by the quality measurement unit 15. Treatment water W contaminants separated by sand filtration unit 20 is enriched 1 is drained W 8 is discharged as.
[0054]
　As described above, according to the water treatment apparatus 3 according to this embodiment, the water to be treated W by sand filtration by sand filter unit 20 1 the sample water W with reduced turbidity concentration of 5 water quality by using a since measures, the water to be treated W 1 it is possible to obtain a water quality evaluation index value that reflects the water quality. Thus, the water treatment device 3, the water to be treated W 1 it is possible to quickly change the filtering conditions of the water to be treated filtering part 11 with respect to changes in water quality of the filtered water W 2 to stabilize the quality of it is possible.
[0055]
(Fourth Embodiment)
　Next, a description will be given of a fourth embodiment of the present invention. In the following, the description will focus on differences from the third embodiment described above, avoid duplication of description.
[0056]
　Figure 6 is a schematic diagram of a water treatment apparatus 4 according to the fourth embodiment of the present invention. As shown in FIG. 6, the water treatment apparatus 4 according to this embodiment, treated water purification unit in place of the sand filtration unit 20 of the water treatment apparatus 3 according to the third embodiment described above (pretreatment unit ) equipped with a 21. The treated water purifier 21 is a bubbling type small septic tank, the treated water drainage unloading line L 4 water to be treated W was extracted into 1 by blowing air by storing temporarily, the water to be treated W 1 in suspended solid to reduce the concentration. Thus, the water to be treated W 1 measured water W contaminants has been reduced by rapid filtration 5 it is possible to adjust the water to be treated W 1 measured water W in the water quality is reflected 5 the It can be obtained quickly. As the water to be treated purifier 21, the water to be treated W 1 is not particularly limited as long as it can reduce the contaminants concentration in.
[0057]
　Next, a description will be given of the overall operation of the water treatment apparatus 4 according to the present embodiment. Treated water line L by the liquid feed pump 16 1 water to be treated W was supplied from the 1 is the filtered water W filtered with water to be treated is filtered 11 2 together with the A part of the treated water drainage unloading L 4 in It is withdrawn. Treated draining unloading L 4 treatment water W withdrawn to 1 , the suspended solid concentration measured water W is adjusted to a predetermined range are contaminants are separated in the treatment water purifier 21 5 becomes. The measured water W 5 is water is measured by the quality measurement unit 15. Overflow water treatment water purification unit 21, drainage W 9 is discharged as.
[0058]
　As described above, according to the water treatment apparatus 4 of the present embodiment, the water to be treated W by treatment water purification unit 21 1 the sample water W with reduced turbidity concentration of 5 measuring water quality using a since, water to be treated W 1 it is possible to obtain a water quality evaluation index value that reflects the water quality. Thus, the water treatment device 4, water to be treated W 1 it is possible to quickly change the filtering conditions of the water to be treated filtering part 11 with respect to changes in water quality of the filtered water W 2 to stabilize the quality of it is possible.
[0059]
　In the embodiment described above, description has been made of an example of using the water purification device of the bubbling type as the treatment water purification unit 21, the treatment water purifier 21, the water to be treated W 1 reduces the contaminants in the sample water W to 5 as long as it is obtained, is applicable to various types of water purification devices.
[0060]
(Fifth Embodiment)
　Next explained is the fifth embodiment of the present invention. In the following, the description will focus on differences from the first embodiment described above, avoid duplication of description.
[0061]
　Figure 7 is a schematic diagram of a water treatment device 5 according to a fifth embodiment of the present invention. As shown in FIG. 7, a water treatment device 5 according to this embodiment, in addition to the configuration of the water treatment device 1 according to the first embodiment described above, the treated water line L 1 treatment water filtration a coagulant supplying portion 22 provided on the front parts 11, filtered water line L of the subsequent treatment water filtration unit 11 2 and a second water measurement unit 23 provided in.
[0062]
　Aggregating agent dispenser unit 22, an aluminum sulfate (Al 2 (SO 3 ) 2 ), and an aluminum salt-based coagulant such as polyaluminum chloride, and ferric chloride (FeCl 3 iron salt flocculants, etc.), active silicic acid, inorganic polymer flocculants such as polysilica iron, sodium alginate, sodium carboxymethyl cellulose (CMC), sodium polyacrylate, partially hydrolyzed salts of POI polyacrylamide, and an organic polymer flocculating and maleic acid copolymer agents such as water to be treated W 1 water to be treated W was poured into 1 the concentration of the coagulant in within a predetermined range. Thus, the water to be treated W 1 since contaminants in the agglomerate, the water to be treated W 1 can be contaminants in is efficiently removed by the treatment water filtration unit 11.
[0063]
　Second quality measuring unit 23, the filtered water W 2 by measuring the water quality of the calculated water quality evaluation index value, the water to be treated W based on the calculated quality evaluation index value 1 to evaluate the water quality. The water quality evaluation index value, similarly to the first quality measuring unit 15, for example, SDI value (Silt Density Index), and SFF (Soluble Fouling Factor) can be mentioned.
[0064]
　In this embodiment, the control unit 18, the sample water W was measured by the first water measurement unit 15 5 filtered water W was measured by the water quality and second quality measuring unit 23 of 2 coagulant supplying portion based on the quality of treated water W from 22 1 controls the amount of flocculant to be introduced into the. Control unit 18, the sample water W was measured by the first water measurement unit 15 5 when the water quality exceeds a predetermined threshold, the aggregating agent dispenser unit 22 the water to be treated W 1 the amount of coagulant to be introduced into the increase. The control unit 18, the sample water W was measured by the first water measurement unit 15 5 water quality is equal to or less than the predetermined threshold value, the filtered water W was measured by the second water measurement unit 23 2 of the water quality of a given if it exceeds the threshold value, the aggregating agent dispenser unit 22 the water to be treated W 1 increases the amount of coagulant to be introduced into the. Further, the control unit 18, the sample water W was measured by the first water measurement unit 15 5 water quality is equal to or less than the predetermined threshold value, the filtered water W was measured by the second water measurement unit 23 2 of the water quality of a given in from aggregating agent dispenser unit 22 the water to be treated W when the threshold value or less 1 or reduce to maintain the amount of the coagulant to be introduced into the.
[0065]
　Next, a description will be given of the overall operation of the water treatment device 5 according to this embodiment. Treated water line L by the liquid feed pump 16 1 water to be treated W was supplied from the 1 is partially treated water drainage unloading L 4 after being withdrawn a predetermined amount of coagulant is from aggregating agent dispenser 22 is added filtered water W was filtered through a treated water filtration unit 11 2 a. The filtrate W 2 , after being passed through the filter member (not shown), after being filtered by the reverse osmosis membrane filtration unit 12 is pressurized by the high pressure pump 17, permeate W 3 and concentrated water W 4 and Become. In the present embodiment, filtered water W by the second quality measuring unit 23 2 quality of is measured. Filtered water W was used for the measurement of water quality 2 is drained W 10 is discarded as. Concentrated water W pressurized by the high pressure pump 17 4 , the energy is recovered by the energy recovery unit 13. This energy is used to a driving of the high pressure pump 17.
[0066]
　Filtered water W 2 portion of the filtered water supply line L 6 through with filtered water mixing unit 14 the water to be treated W 1 measured water W are mixed with 5 becomes. The measured water W 5 is water is measured by the first water measurement unit 15. Thus the water to be treated W 1 and the filtered water W 2 by mixing in a predetermined ratio, water to be treated W 1 can be obtained a water quality evaluation index values of the water is reflected, the water to be treated W 1 a water treatment unit 5 can be properly operated management in response to changes in water quality. The sample water W after the water has been measured by the first water measurement unit 15 5 is drained W 6 is discharged as.
[0067]
　Next, the method of operating the water treatment apparatus 5 according to the reference to the embodiment of FIG. 8 will be described in detail. Figure 8 is a flow diagram of a method of operating a water treatment apparatus 5 according to this embodiment.
[0068]
　As shown in FIG. 8, after the operation start of the water treatment apparatus 5, the first quality measuring unit 15 the water to be treated W 1 and filtered water W 2 and is the sample water W are mixed at a predetermined ratio 5 water quality of is measured (step ST11). Control unit 18, the sample water W was measured 5 If the quality of exceeds a predetermined threshold value (step ST12: No), the increase dosage of flocculant from aggregating agent dispenser unit 22 (step ST13). Further, the sample water W was measured 5 when water quality is below a predetermined threshold value (step ST12: Yes), the filtered water W by the second quality measuring unit 23 2 quality of is measured (step ST14). Then, the control unit 18, the filtered water W was measured 2 if the quality of exceeds a predetermined threshold value (step ST15: No), the increase dosage of flocculant from aggregating agent dispenser unit 22 (step ST13) . Was also measured filtered water W 2 if the water quality of the predetermined threshold value or less (step ST15: Yes), the control unit 18, (step maintaining or reducing the input amount of flocculant from aggregating agent dispenser 22 ST16).
[0069]
　As described above, according to the water treatment device 5 according to this embodiment, the filtered water W 2 by mixing with water to be treated W 1 measured water W with reduced turbidity concentration of 5 using since measuring the water quality, the water to be treated W 1 it is possible to obtain a water quality evaluation index value that reflects the water quality. Thus, the water treatment device 5, the water to be treated W 1 from aggregating agent dispenser unit 22 with respect to water quality changes in the filtered water W 2 so can be properly controlled amount of the coagulant to the water to be treated is filtered section can quickly change the 11 filtration conditions, the filtered water W 2 it is possible to prevent fouling of the reverse osmosis membrane 12a of stabilizing the quality of the reverse osmosis membrane filtration unit 12.
[0070]
(Sixth Embodiment)
　Next, a description will be given of a sixth embodiment of the present invention. In the following, the description will focus on differences from the second embodiment described above, avoid duplication of description.
[0071]
　Figure 9 is a schematic diagram of a water treatment apparatus 6 according to the sixth embodiment of the present invention. As shown in FIG. 9, the water treatment apparatus 6 according to this embodiment, in addition to the configuration of the water treatment apparatus 2 according to the second embodiment described above, the water treatment apparatus according to the fifth embodiment 5 of flocculants are those having the structure of the insertion portion 22 and the second quality measurement unit 23. Other omitted because the same as the water treatment apparatus 5 according to a second embodiment of the water treatment device 2 and the fifth embodiment according to the embodiments described above.
[0072]
　According to the water treatment apparatus 6 of the present embodiment, the water to be treated W by solid-liquid separation unit 19 1 the sample water W with reduced turbidity concentration of 5 because measuring the water quality by using water to be treated W 1 it is possible to obtain a water quality evaluation index value that reflects the water quality. Thus, the water treatment apparatus 6, the water to be treated W 1 from aggregating agent dispenser unit 22 with respect to water quality changes in the filtered water W 2 so can be properly controlled amount of the coagulant to the water to be treated is filtered section can quickly change the 11 filtration conditions, the filtered water W 2 it is possible to prevent fouling of the reverse osmosis membrane 12a of stabilizing the quality of the reverse osmosis membrane filtration unit 12.
[0073]
(Seventh Embodiment)
　Next, a description will be given of a seventh embodiment of the present invention. In the following, the description will focus on differences from the third embodiment described above, avoid duplication of description.
[0074]
　Figure 10 is a schematic diagram of a water treatment apparatus 7 according to the seventh embodiment of the present invention. As shown in FIG. 10, the water treatment device 7 according to this embodiment, in addition to the configuration of the third water treatment apparatus 3 according to the embodiment of the above-described water treatment device according to the fifth embodiment 5 of flocculants are those having the structure of the insertion portion 22 and the second quality measurement unit 23. Other omitted because the same as the water treatment apparatus 5 according to a third embodiment of water treatment apparatus 3 and the fifth embodiment according to the embodiments described above.

[Claim 1]
　And treatment water filtration unit for a filtered water and filtered water to be treated is supplied from the water to be treated lines,
　the provided object to be processed drainage unloading line branched from the treated water line, of the object to be processed drainage unloading line a pre-processing unit to the sample water to reduce the contaminants concentration in the water to be treated,
　the provided after the pre-processing unit in the treated water drain unloading lines, said by measuring the quality of the measured water a first quality measuring unit for evaluating the quality of the water to be treated,
　the water treatment apparatus characterized by comprising a.
[Claim 2]
　With a reverse osmosis membrane filtration unit to permeate and retentate by filtering the filtered water by a reverse osmosis membrane, water treatment apparatus according to claim 1.
[Claim 3]
　The pre-processing unit, wherein the filtered water said mixture of the water to be treated the for-treatment water is filtered water mixing unit to the sample water, the water treatment apparatus according to claim 1 or claim 2 .
[Claim 4]
　Wherein the sample water, the water to be treated and the treated water to a 60 vol% 5 vol% or more and the filtered water is formed by mixing water treatment apparatus according to claim 3.
[Claim 5]
　The pre-processing unit, said a solid-liquid separating section to the liquid in the water to be treated by solid-liquid separation and turbidity of the treatment water the water to be treated with the measured water, according to claim 1 or claim water treatment device according to claim 2.
[Claim 6]
　The solid-liquid separation unit, the separation efficiency of the turbidity is 60% or more, the water treatment apparatus according to claim 5.
[Claim 7]
　The pre-processing unit, said a sand filtration unit to the measured water the water to be treated by a relatively filtration rate is fast sand filter water to be treated filtration unit, to claim 1 or claim 2 the water treatment apparatus according.
[8.]
　The pre-processing unit, said a treated water purification unit to the measured water the water to be treated to reduce contaminants in the water to be treated by bubbling, water treatment of claim 1 or claim 2 apparatus.
[Claim 9]
　Wherein the aggregating agent dispenser unit to inject flocculant to the water to be treated,
　the second quality measuring unit for measuring the quality of filtered water,
　the treated water quality and the second evaluated in the first quality measuring unit the water treatment apparatus as claimed in any one of claims 8 and a control unit for controlling the input of the coagulant based on the water quality of the filtered water was measured by the water quality measuring unit.
[Claim 10]
　The method comprising the measured water to reduce the contaminants concentration in the treated water to be treated draining unloading line branched from the treated water line,
　evaluate the quality of the treated water by measuring the quality of the measured water a step of,
　the steps of controlling the charging amount of the aggregating agent to the water to be treated on the basis of the quality of the water to be treated was evaluated
　by measuring the water quality of the filtered water and filtered water to be treated in the treatment water line characterized in that it comprises a step of controlling the charging amount of the aggregating agent to the water to be treated Te, water treatment process.
Drawing