Anaerobic fermentation technology for rural kitchen waste

A technology of kitchen waste and anaerobic fermentation, applied in fermentation, waste fuel and other directions, can solve the problems of low utilization rate and difficult disposal of kitchen waste, and achieve the effect of increasing utilization rate, increasing production, and increasing methane production.

Active Publication Date: 2017-11-17
BIOGAS SCI RES INST MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an anaerobic fermentation process for kitchen waste, which can effectively solve the problems of difficult disposal of kitchen waste and low utilization rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An anaerobic fermentation process for rural kitchen waste, comprising the following steps:

[0025] (1) Sorting the food waste to be treated, removing plastic products, metal blocks, glass bottles and other sundries contained in the food waste;

[0026] (2) Add iron sulfate accounting for 3% by weight to the product obtained in step (1), react for 50 minutes, then filter, and collect the filtrate and filter residue respectively;

[0027] (3) Add 3 times the volume of organic solvent I, organic solvent II and organic solvent III to the filtrate, extract 3 times at 30°C for 2 hours each time, then collect the organic layer separately, mix and concentrate, and extract the concentrated The product is added to the filter residue obtained in step (2); the organic solvent I is methanol, and the organic solvent II includes isopropanol and ethyl acetate; wherein, the volume ratio of isopropanol and ethyl acetate is 3:1; the organic solvent III includes chloroform And dichlorome...

Embodiment 2

[0030] An anaerobic treatment process for rural kitchen waste, comprising the following steps:

[0031] (1) Sorting the food waste to be treated, removing plastic products, metal blocks, glass bottles and other sundries contained in the food waste;

[0032] (2) Add iron sulfate accounting for 3% by weight to the product obtained in step (1), react for 50 minutes, then filter, and collect the filtrate and filter residue respectively;

[0033] (3) Add 3 times the volume of organic solvent I, organic solvent II and organic solvent III to the filtrate, extract 3 times at 25°C for 4 hours each time, then collect the organic layer separately, mix and concentrate, and extract the concentrated The product is added to the filter residue obtained in step (2); the organic solvent I is methanol, and the organic solvent II includes isopropanol and ethyl acetate; wherein, the volume ratio of isopropanol and ethyl acetate is 4.5:1.8; the organic solvent III includes chloroform And dichlorom...

Embodiment 3

[0036] An anaerobic fermentation process for rural kitchen waste, comprising the following steps:

[0037] (1) Sorting the food waste to be treated, removing plastic products, metal blocks, glass bottles and other sundries contained in the food waste;

[0038] (2) Add iron sulfate accounting for 2% by weight to the product obtained in step (1), react for 30 minutes, then filter, and collect the filtrate and filter residue respectively;

[0039] (3) Add 2 times the volume of organic solvent Ⅰ, organic solvent Ⅱ and organic solvent Ⅲ to the filtrate, extract 3 times at 25°C for 3.5 hours each time, then collect the organic layer separately, mix and concentrate, and extract the concentrated The product of step (2) is added in the obtained filter residue; The organic solvent I is methanol, and the organic solvent II includes isopropanol and ethyl acetate; wherein, the volume ratio of isopropanol and ethyl acetate is 5:2; the organic solvent III includes Chloroform and dichloromet...

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Abstract

The invention discloses an anaerobic fermentation technology for rural kitchen waste. The anaerobic fermentation technology for the rural kitchen waste comprises the following steps of (1) sorting and impurities removing, (2) flocculation and filtration, (3) extraction and concentration, and (4) anaerobic fermentation. According to the anaerobic fermentation technology for the rural kitchen waste, the yield of metabolite in the acid producing stage can be increased effectively so that the yield of methane and the bioavailability of the rural kitchen waste can be increased.

Description

technical field [0001] The invention belongs to the technical field of domestic waste treatment, and in particular relates to an anaerobic fermentation process of rural kitchen waste. Background technique [0002] At present, domestic food waste treatment methods are mainly resource-oriented, and the most widely used methods are landfill treatment, feed method, traditional composting treatment, incineration treatment and pyrolysis. Compared with aerobic composting and feed production, anaerobic fermentation has greater advantages in the treatment of food waste. The biogas produced by anaerobic fermentation can be effectively utilized as an energy source while reducing CO 2 、CH 4 and other greenhouse gas emissions; the reaction process requires an anaerobic state, so the reaction equipment is airtight, and there will be no more odors; the amount of residue produced after fermentation is small, and the cost of subsequent treatment and transportation is also low. Relatively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 魏珞宇张国治罗臣乾申禄坤
Owner BIOGAS SCI RES INST MIN OF AGRI
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