Food residue and sludge mixing anaerobic treatment method and system

A technology for catering waste and anaerobic treatment, which is applied in the direction of biological sludge treatment, biomass pretreatment, biological organic part treatment, etc., can solve the problems of no mixed treatment process and system, and achieve the goal of overcoming the lack of alkalinity and nutrients, The effect of increasing the processing capacity and improving the effect of biogas fermentation

Inactive Publication Date: 2012-02-15
LIDA ENVIRONMENT ENG DALIAN ECONOMIC TECH DEV ZONE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, food waste treatment and sludge treatment are generally two systems and two separate processes. At present, there is no process or system that directly mixes the two.

Method used

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  • Food residue and sludge mixing anaerobic treatment method and system
  • Food residue and sludge mixing anaerobic treatment method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 Shown is an anaerobic treatment system for mixing food waste and sludge, including food waste pretreatment and anaerobic digestion;

[0024] The catering waste pretreatment part includes catering waste storage tank 1, material conveyor 2, crushing and separating device 3, slurry storage tank 4, and slurry lifting pump 5; the outlet of the catering waste storage tank is connected to the material conveyor, and the outlet of the material conveyor is connected to the crushing The inlet of the separation device, the outlet of the crushing and separation device are connected to the slurry storage tank, and the outlet of the slurry storage tank is connected to the feeding pipe of the food waste of the anaerobic digestion device. A slurry lift is installed between the slurry storage tank and the feeding pipe of the food waste. Pump;

[0025] The anaerobic digestion part includes sludge feed pipe 6, catering waste feed pipe 7, anaerobic digestion device 8, agitator 9, ...

Embodiment 2

[0029] Adopt the anaerobic treatment system that the food waste of embodiment 1 mixes with sludge to process, and specific process comprises food waste pretreatment and anaerobic digestion treatment:

[0030] Catering waste pretreatment: Catering waste and urban sludge are transported to the treatment plant by transport vehicles. Catering waste with an oil content of less than 8% enters the catering waste storage tank 1 after unloading, and the gate valve is opened to transport the materials in the waste storage tank through the material. The machine 2 is sent to the crushing and separating machine 3 for crushing and separation, crushing to a particle size below 30mm, so that the impurities are separated from the food waste, the treated slurry part enters the slurry storage tank 4, and the impurity part enters the slag tanker;

[0031] Anaerobic digestion treatment: the slurry enters the anaerobic digestion device 8 through the slurry lifting pump 5, and the municipal sludge en...

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Abstract

The invention belongs to the technical field of food residue and municipal sludge treatment. A food residue and sludge mixing anaerobic treatment method comprises a food residue pretreatment and anaerobic digestion treatment, wherein the food residue pretreatment is that: the food residue with the grease content less than 8% is transferred to a breaking and separating unit to break and separate, and is broken until the granular is less than 30mm, and the serous liquid is obtained for spare use; and the anaerobic digestion treatment is that: the serous liquid which is obtained after the food residue pretreatment is transferred to an anaerobic digestion device, meanwhile, the sludge also enters the anaerobic digestion device, the solid content of the mixing material is 8-12%, stirring and mixing are carried out in the anaerobic digestion device, so the anaerobic digestion is carried out. The invention has the following characteristics: 1, the food residue which is not classified can be treated, the invention is in accordance with the urban food residue source classification current situation in China; 2, the food residue does not need oil-water separation, is directly mixed with sludge to enter the anaerobic digestion system, so that biodegradation is carried out for producing methane, the technological equipment is simple, and the recycling degree is high; and the heat and electricity consumption are saved, and the operation cost is low.

Description

technical field [0001] The invention belongs to the technical field of catering waste and urban sludge treatment. Background technique [0002] Catering waste is the most common waste generated in urban daily life services, and is one of the main sources of urban domestic waste. Its main components are organic matter such as starchy food, plant fiber, animal protein, and fat. , High salt content, easy to rot and smell, not conducive to the transportation of ordinary garbage trucks. This kind of garbage will cause great harm to the environment if it is not treated specially by classification. Catering waste treatment can be roughly divided into mechanical crushing, composting, biological feed and anaerobic digestion. EU countries, especially Germany, mainly use anaerobic digestion to treat food waste, and Japan also has similar applications. Catering waste needs to undergo complex classification and heating pretreatment first to remove various impurities and the remaining ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04C12M1/107C05F5/00
CPCC12M21/04C12M27/06C12M45/04Y02E50/30Y02W30/40
Inventor 董金庆刘军袁刚孙举柱
Owner LIDA ENVIRONMENT ENG DALIAN ECONOMIC TECH DEV ZONE
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