JP5201689B2 - Waste treatment system - Google Patents

Description

The present invention relates to a waste treatment apparatus in a treatment system that includes a methane fermentation facility and generates methane gas from kitchen wastewater containing straw (raw garbage) and fats and oils.

Conventionally, treatment systems that purify kitchen wastewater containing kitchen waste (raw garbage) and animal and vegetable oils and fats generated in canteens, etc., and obtain methane gas have been widely used as energy resource recycling. Reference 1 includes a garbage lysate extractor, an acid generator tank that decomposes organic matter dissolved in water from the lysate extractor with anaerobic microorganisms, and an organic acid dissolved in water from the acid generator tank. A system has been proposed in which methane gas is obtained by fermentation. In Patent Document 2, solid organic waste is mixed with waste containing fat and oil, heated to solubilize fat and oil, and then subjected to methane fermentation treatment. The processing method is shown.

JP 2003-33781 A JP 2002-102828 A

However, in large-scale kitchens, straw (raw garbage) put into a long sink is pulverized with a disposer attached to the end of the sink. A large amount of tap water is supplied to the sink in order to pour the added straw into the disposer, so that the disposer has a lot of water discharged together with the crushed straw, and the discharged straw is put into the solubilization tank as it is. However, after removing water with a solid-liquid separator installed at a location away from the kitchen, it is necessary to put it in a solubilization tank together with treated water containing fats and oils sent from a grease trap. Therefore, between the remote kitchen and the methane gas generator, a waste treatment system and a transportation system to the solubilization tank for the kitchen wastewater containing fats and oils must be provided separately, which makes the treatment system equipment and piping troublesome. There is a drawback that the cost is increased.

The present invention collects a treatment liquid containing fats and oils from the surface layer of kitchen wastewater stored in a grease trap , supplies the treatment liquid to the crushing chamber or crushing chamber and sink of the disposer, and supplies the sink to the sink from the outside. The amount of tap water to be used is reduced to adjust the water content in the pulverized culm, and the pulverized culm from the disposer and the treated water containing fats and oils are mixed in the disposer and solubilized in one pipe It can be supplied to the tank and promotes methane fermentation so that it can be reused for energy resources.

In this way, the present invention supplies treated water containing organic fats and oils from the grease trap to the crushing chamber or crushing chamber and sink of the disposer, helps crushing the straw with the treated water supplied, and flows into the crushing chamber. In addition to reducing the amount of water used from the plant, the oil and fat components and the pulverized rice cake are thoroughly mixed in the crushing chamber to promote fermentation, as well as a solubilization tank installed away from the sink and grease trap. In addition, there is no need to separately provide a transport pipe for sending the treatment tank and a pipe for sending the treatment liquid containing fats and oils, and the effect of simplifying the system apparatus can be obtained.

It is a flowchart which shows the whole Example of the waste-treatment system which obtains methane gas from the kitchen waste_water | drain containing the soot and fats and oils by this invention. It is an Example which shows the principal part of this invention system. It is another Example which shows the principal part of this invention system.

The embodiment shown in the drawings will be described below.
FIG. 1 is an example of a flowchart showing the entire waste treatment system according to the present invention. The waste introduced into the sink 1 is poured into the disposer 3 with tap water 22 from the discharge nozzle 2, and the tap from a water tap (not shown). Water is added and rotated and crushed by the rotating plate of the crushing chamber 3a.

Kitchen wastewater 4 containing animal and vegetable oils and fats is stored in a grease trap 5 to separate the oils and fats, and treated water containing the oils and fats is supplied to the crushing chamber 3a of the disposer 3 through the grease pipe 7 by the electric valve 6.

In the crushing chamber 3a, the soot introduced from the sink 1 and the treated water containing the oil and fat from the grease trap 5 are mixed and the soot is rotated and pulverized, and the discharge is solubilized by the slurry tube 8 by the transport pump 23. Send to tank 9.
The waste solubilized in the solubilization tank 9 is sent to the methane fermentation facility 10 to be gasified and supplied to the boiler 12 and the power generation device 13 through the gas purification facility 11.

FIG. 2 is a configuration diagram showing a portion including the grease trap 5 and the disposer 3 in the above-described processing system. The trough 21 introduced into the sink 1 is washed away with tap water 22 ejected from the discharge nozzle 2 of the sink, and the disposer 3 It is thrown into the crushing chamber 3a. The tap water 22 from the discharge nozzle 2 is for sending the slag 21 introduced into the sink 1 to the inlet of the disposer 3, and the amount of water required for stirring and crushing the slag in the crushing chamber 3a is shown in the figure. Tap water is added from another water tap that is not present and flows into the crushing chamber 3a.
The kitchen wastewater 4 containing animal and vegetable oils and fats is stored in a grease trap 5 provided near the sink 1 to separate the oil and fat components 51, and a treatment liquid containing a large amount of these oils and fats is supplied to the disposer 3 by a pump 52. The grease pipe 7 connected to the supply port on the side surface of the crushing chamber 3a is supplied to the crushing chamber 3a of the disposer 3 through the electric valve 6. The water from which the oil and fat 51 has been separated is discharged from the discharge port 53.

The soot introduced into the crushing chamber 3a is rotated and crushed in the crushing chamber by a rotating plate together with tap water from the discharge nozzle 2 and water for crushing supplied from a water tap (not shown). The processing liquid containing the basic oil and fat is added, and this processing liquid is mixed with water and soot from the sink 1 to assist the crushing process. By opening the electric valve 6 and supplying the processing water, the crushing process supplied to the sink 1 The processing water containing pulverized soot and fats and oils can be sufficiently mixed with the crushing action, and sent to the solubilization tank 9 through the single slurry pipe 8 by the transport pump 23.

FIG. 3 shows that the processing liquid from the grease trap 5 is supplied from the side surface to the crushing chamber 3a through the grease pipe 7 and from the supply nozzle 25 on the disposer 3 side of the sink 1 to the inlet of the disposer 3 via the electric valve 24. It is designed to facilitate the flow of firewood into the disposer 3 so that the amount of tap water supplied from a water tap (not shown) can be reduced separately from the tap water 22 from the discharge nozzle 2. The same reference numerals are given to the same parts as in FIG.

In addition, when supplying the treatment liquid to the sink, the treatment liquid containing fats and oils directly enters the disposer by supplying from the supply nozzle 25 on the disposer 3 side attached to the sink. No hygienic problems.

DESCRIPTION OF SYMBOLS 1 Sink 2 Discharge nozzle 3 Disposer 3a Crushing chamber 4 Kitchen drainage 5 Grease trap 6 Electric valve 7 Grease pipe 8 Slurry pipe 9 Solubilization tank 10 Methane fermentation equipment 11 Gas purification equipment 12 Boiler 13 Power generation equipment 21 厨 芥 22 Tap water 23 Transport pump 24 Electric valve 25 Supply nozzle 51 Oil and fat content 52 Pump 53 Discharge port

Claims (2)

In a waste treatment system in which methane gas is obtained from kitchen wastewater containing cocoons and a large amount of animal and vegetable oils,
A disposer attached to the sink into which the firewood is thrown in ;
A grease trap that stores kitchen wastewater and separates oil and fat ,
A solubilization tank for solubilizing waste,
A methane fermentation facility for obtaining methane gas from waste solubilized in the solubilization tank;
A collecting means for collecting a treatment liquid containing fats and oils from a surface layer of kitchen wastewater stored in the grease trap;
The collected treatment fluid by said collecting means, and supplied to the crushing chamber of the disposer, the thoroughly mixed with the treatment liquid in the crushing chamber crushed garbage, into the solubilization reactor with one slurry pipe A waste treatment system characterized by sending. The treatment liquid, together with the crushing chamber of the disposer, and so also supplied to the sink
The waste treatment system according to claim 1.

Images