1. An electrocoagulation cell (100) for wastewater treatment, comprising: (a) a hollow housing (101) usable for permitting a stream of wastewater feed to be treated, through an inlet (151) and for releasing the treated water feed through an outlet (152); (b) a rotatable and electrically insulated shaft (108) with electrically conductive members (102, 103) and connectors (109, 111), in electrical communication with a current source (150), disposed in the hollow housing (101); and (c) a plurality of rotatable mesh electrodes (106a) disposed in the hollow housing (101) and radially connected to the rotatable and electrically insulated shaft (108) with intervening spaces and the plurality of rotatable mesh electrodes (106a) are adapted to treat the stream of wastewater feed and release treated water.

2. The electrocoagulation cell (100) as claimed in claim 1, wherein the electrically conductive members (102, 103) are with opposite polarity.

3. The electrocoagulation cell (100) as claimed in claim 1, wherein the rotatable mesh electrodes (106a) are disposed to be electrically in parallel or in a combination with electrically in series.

4. The electrocoagulation cell (100) as claimed in claim 1, wherein the rotatable mesh electrodes (106a) are disposed in parallel or perpendicular, to the flow of the stream of wastewater feed.

5. The electrocoagulation cell (100) as claimed in claim 1, wherein further comprising; (a) holders (104a, 104b) with slots (105a, 105b) disposed in upper and lower portions of the hollow housing (101); (b) non-rotatable mesh electrodes (106b) are connected to the holders (104a, 104b) with intervening spaces; and (c) the electrically conductive member (102) is coupled to one of the nonrotatable mesh electrodes (106b) and the electrically conductive 32 members (103) are coupled to other non-rotatable mesh electrodes (106b). FIG.4

6. The electrocoagulation cell (100) as claimed in claim 5, wherein the electrically conductive members (102, 103) are disposed to extend along parallel axis of the holders (104a, 104b) and the alternate ends of the non-rotatable mesh electrodes (106b) are coupled to the electrically conductive members (102, 103).

7. The electrocoagulation cell (100) as claimed in claim 5, wherein the electrically conductive members (102, 103) are coupled directly to the electrically conductive members (102, 103) and through spacers (107).

8. The electrocoagulation cell (100) as claimed in claim 1, wherein the nonrotatable mesh electrodes (106b) are disposed in parallel or perpendicular to the flow of the stream of wastewater feed.

9. The electrocoagulation cell (100) as claimed in claim 1, wherein a plurality of the electrocoagulation cells (100), including rotatable mesh electrodes and nonrotatable (106 and 106a) is connected, to form an array of the electrocoagulation cells (100).

10. A system for treating wastewater, comprising: (a) an inlet (116) with a smart T-junction to regulate the flow of incoming waste water feed from a source, (b) an input tank (131), including a total dissolved solids (TDS) sensor (126), is in flow communication with the inlet (116); (c) an electrical conductivity regulating unit (118) is in flow communication with the input tank (131), to permit a regulated flow of an electrical conductivity regulating material; (d) at least the electrocoagulation cell (100) as set forth in claim 1 is configured to be connected to the input tank (131) to treat the stream of wastewater through electrocoagulation and release the treated water to reusable storage tank (121) with a faucet (114), through a sludge separator (136), a sludge connection unit (122) and a post filtration chamber (139); 33 (e) a controller (142) is disposed to control the at least electrocoagulation cell (100), a power handling unit (119), the TDS sensor (126), level indicator (132), level indicator for the electrical conductivity regulating material (128) and controls (CTRL1 to CTRL8).

11. The system as claimed in claim 10, wherein the electrical conductivity regulating material is one of NaCl, KCl, HCl, K2SO4 HCl, NaOH or a combination thereof.

12. The system as claimed in claim 10, wherein the input tank (131) includes a bubble generator (143), stirring fans (144) or a combination thereof.

13. The system as claimed in claim 10, wherein includes an array of the electrocoagulation cells (100).

14. A method for treating waste water, the method comprising the steps of: - (a) receiving a waste water feed from a source and storing in an input tank, (b) measuring the conductivity of the wastewater feed and controlling its electrical conductivity by - infusing a sufficient amount of an electrical conductivity regulating material, - optimising the resistivity of the wastewater feed, - maintaining TDS below reusable water standards, - allowing a desired current to treat the wastewater feed to meet reusable water standards in a shorter time such that voltage across the electrocoagulation cell does not to exceed an available voltage limit, (c) transporting the wastewater feed with an optimal electrical conductivity into at least an electrocoagulation cell with mesh electrodes and rotating the mesh electrodes periodically to subject the waste water feed to electrocoagulation, in the presence of a preferred magnitude of an applied current, where the current wave form is constant in time (DC) or varying in time with a controlled RMS value, to obtain a treated water; and 34 (d) removing sludge from the treated water and transporting the treated water for reuse.

15. The method as claimed in claim 14, wherein a step of electro oxidation is performed to reduce the biological oxygen demand (BOD) and chemical oxygen demand (COD), in the waste water feed.

16. The method as claimed in claim 14, wherein the treatment of the waste water feed is performed either batchwise or continuous.

17. The method as claimed in claim 14, wherein the electrical conductivity regulating material is one of NaCl, KCl, HCl, K2SO4 HCl, NaOH or a combination thereof.

18. The method as claimed in claim 14, wherein the applied voltage is in range of 110-230V with a current in the range of 5-15 amps.

19. The method as claimed in claim 14, wherein the removed sludge is transported to a drain line.

20. The method as claimed in claim 14, wherein pH of wastewater feed in the input tank is controlled by adding dosing acids or bases selected from HCl, NaOH, KOH and citric acid or a combination thereof.

Claims: -
1. An electrocoagulation cell (100) for wastewater treatment, comprising:
(a) a hollow housing (101) usable for permitting a stream of wastewater
feed to be treated, through an inlet (151) and for releasing the treated
water feed through an outlet (152);
(b) a rotatable and electrically insulated shaft (108) with electrically
conductive members (102, 103) and connectors (109, 111), in electrical
communication with a current source (150), disposed in the hollow
housing (101); and
(c) a plurality of rotatable mesh electrodes (106a) disposed in the hollow
housing (101) and radially connected to the rotatable and electrically
insulated shaft (108) with intervening spaces and the plurality of
rotatable mesh electrodes (106a) are adapted to treat the stream of
wastewater feed and release treated water.
2. The electrocoagulation cell (100) as claimed in claim 1, wherein the electrically
conductive members (102, 103) are with opposite polarity.
3. The electrocoagulation cell (100) as claimed in claim 1, wherein the rotatable
mesh electrodes (106a) are disposed to be electrically in parallel or in a
combination with electrically in series.
4. The electrocoagulation cell (100) as claimed in claim 1, wherein the rotatable
mesh electrodes (106a) are disposed in parallel or perpendicular, to the flow of
the stream of wastewater feed.
5. The electrocoagulation cell (100) as claimed in claim 1, wherein further
comprising;
(a) holders (104a, 104b) with slots (105a, 105b) disposed in upper and
lower portions of the hollow housing (101);
(b) non-rotatable mesh electrodes (106b) are connected to the holders
(104a, 104b) with intervening spaces; and
(c) the electrically conductive member (102) is coupled to one of the nonrotatable mesh electrodes (106b) and the electrically conductive
32
members (103) are coupled to other non-rotatable mesh electrodes
(106b). FIG.4
6. The electrocoagulation cell (100) as claimed in claim 5, wherein the electrically
conductive members (102, 103) are disposed to extend along parallel axis of
the holders (104a, 104b) and the alternate ends of the non-rotatable mesh
electrodes (106b) are coupled to the electrically conductive members (102,
103).
7. The electrocoagulation cell (100) as claimed in claim 5, wherein the electrically
conductive members (102, 103) are coupled directly to the electrically
conductive members (102, 103) and through spacers (107).
8. The electrocoagulation cell (100) as claimed in claim 1, wherein the nonrotatable mesh electrodes (106b) are disposed in parallel or perpendicular to
the flow of the stream of wastewater feed.
9. The electrocoagulation cell (100) as claimed in claim 1, wherein a plurality of
the electrocoagulation cells (100), including rotatable mesh electrodes and nonrotatable (106 and 106a) is connected, to form an array of the electrocoagulation
cells (100).
10. A system for treating wastewater, comprising:
(a) an inlet (116) with a smart T-junction to regulate the flow of incoming
waste water feed from a source,
(b) an input tank (131), including a total dissolved solids (TDS) sensor
(126), is in flow communication with the inlet (116);
(c) an electrical conductivity regulating unit (118) is in flow communication
with the input tank (131), to permit a regulated flow of an electrical
conductivity regulating material;
(d) at least the electrocoagulation cell (100) as set forth in claim 1 is
configured to be connected to the input tank (131) to treat the stream of
wastewater through electrocoagulation and release the treated water to
reusable storage tank (121) with a faucet (114), through a sludge
separator (136), a sludge connection unit (122) and a post filtration
chamber (139);
33
(e) a controller (142) is disposed to control the at least electrocoagulation
cell (100), a power handling unit (119), the TDS sensor (126), level
indicator (132), level indicator for the electrical conductivity regulating
material (128) and controls (CTRL1 to CTRL8).
11. The system as claimed in claim 10, wherein the electrical conductivity
regulating material is one of NaCl, KCl, HCl, K2SO4 HCl, NaOH or a
combination thereof.
12. The system as claimed in claim 10, wherein the input tank (131) includes a
bubble generator (143), stirring fans (144) or a combination thereof.
13. The system as claimed in claim 10, wherein includes an array of the
electrocoagulation cells (100).
14. A method for treating waste water, the method comprising the steps of: -
(a) receiving a waste water feed from a source and storing in an input tank,
(b) measuring the conductivity of the wastewater feed and controlling its
electrical conductivity by
- infusing a sufficient amount of an electrical conductivity regulating
material,
- optimising the resistivity of the wastewater feed,
- maintaining TDS below reusable water standards,
- allowing a desired current to treat the wastewater feed to meet
reusable water standards in a shorter time such that voltage across
the electrocoagulation cell does not to exceed an available voltage
limit,
(c) transporting the wastewater feed with an optimal electrical conductivity
into at least an electrocoagulation cell with mesh electrodes and
rotating the mesh electrodes periodically to subject the waste water
feed to electrocoagulation, in the presence of a preferred magnitude of
an applied current, where the current wave form is constant in time
(DC) or varying in time with a controlled RMS value, to obtain a treated
water; and
34
(d) removing sludge from the treated water and transporting the treated
water for reuse.
15. The method as claimed in claim 14, wherein a step of electro oxidation is
performed to reduce the biological oxygen demand (BOD) and chemical
oxygen demand (COD), in the waste water feed.
16. The method as claimed in claim 14, wherein the treatment of the waste water
feed is performed either batchwise or continuous.
17. The method as claimed in claim 14, wherein the electrical conductivity
regulating material is one of NaCl, KCl, HCl, K2SO4 HCl, NaOH or a
combination thereof.
18. The method as claimed in claim 14, wherein the applied voltage is in range of
110-230V with a current in the range of 5-15 amps.
19. The method as claimed in claim 14, wherein the removed sludge is
transported to a drain line.
20. The method as claimed in claim 14, wherein pH of wastewater feed in the
input tank is controlled by adding dosing acids or bases selected from HCl,
NaOH, KOH and citric acid or a combination thereof.