TECHNICAL FIELD
[0001] The present disclosure relates to a waste treatment system and a waste
treatment method.
The present application claims priority based on Japanese Patent Application No.
5 2020-162501 filed on September 28, 2020, the entire content of which is incorporated
herein by reference.
BACKGROUND ART
[0002] Patent Document 1 describes a treatment device for organic waste including
organic wastewater or solid waste, for example, excess sludge from a sewage
10 treatment plant, food waste such as kitchen waste, or livestock waste. In the treatment
device, organic waste is decomposed into soluble organic matter with low molecular
weight and then separated into solid and liquid phases, and the separated liquid is
degraded (methane fermentation) by microorganisms in a microbial reactor (methane
fermenter) to produce biogas.
15 Citation List
Patent Literature
[0003] Patent Document 1: JP4864339B
SUMMARY
Problems to be Solved
20 [0004] A microbial reactor may quickly become unsuitable for microbial degradation,
for example, if the properties of feed (object to be degraded) supplied to the microbial
reactor are heterogeneous, or if the supply amount of feed isinsufficient. Further,since
microorganisms are sensitive to environmental changes, once the state of the
microbial reactor becomes unsuitable, it takes a lot of time and cost to recover.
25 Therefore, it is desirable to maintain the microbial reactor in a state suitable for
3
microbial degradation.
[0005] The present disclosure was made in view of the above problem, and an object
thereof is to provide a waste treatment system and a waste treatment method whereby
it is possible to maintain the microbial reactor in a state suitable for microbial
5 degradation.

We Claim:
1. A waste treatment system, comprising:
at least one reformer for hydrolyzing waste;
a microbial reactor for microbially degrading a reformed material
5 containing at least a solid of the waste hydrolyzed by the at least one reformer;
a microbial reaction detection device for detecting a state of degradation of the
reformed material in the microbial reactor; and
an adjustment device for adjusting amount and timing of supply of the
reformed material to the microbial reactor, based on a detected value of the
10 microbial reaction detection device.
2. The waste treatment system according to claim 1,
wherein the microbial reaction detection device includes:
a collecting device for collecting part of the reformed material in the
microbial reactor as a detection sample;
15 a solid-liquid separation device for separating the detection sample into a
solid component and a liquid component;
a dilution device for diluting the liquid component separated by the solidliquid separation device; and
a concentration measurement device for measuring concentration of a
20 diluted liquid which is the liquid component diluted by the dilution device.
3. The waste treatment system according to claim 2,
wherein a measured value of the concentration measurement device includes at
least one of concentration of volatile fatty acids or concentration of ammonia
contained in the diluted liquid.
25 4. The waste treatment system according to any one of claims 1 to 3, further
40
comprising:
a reforming state detection device for detecting a state of hydrolysis of the
waste in the reformer; and
a hydrolysis condition adjustment device for adjusting a hydrolysis
5 condition of the waste by the reformer, based on the state of hydrolysis of the
waste in the reformer detected by the reforming state detection device.
5. The waste treatment system according to any one of claims 1 to 4,
wherein the reformed material supplied to the microbial reactor includes a
readily degradable material that can be microbially degraded within a
10 predetermined time in the microbial reactor, and
wherein the adjustment device is configured to adjust supply amount of the
readily degradable material supplied to the microbial reactor and timing of
supply of the readily degradable material to the microbial reactor, based on a
detected value of the microbial reaction detection device.
15 6. The waste treatment system according to any one of claims 1 to 5, further
comprising a separation device, disposed between the at least one reformer and
the microbial reactor, for separating a reaction-unsuitable substance that is
unsuitable for microbial degradation in the microbial reactor from the reformed
material.