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Method for extracting volatile fatty acids

A technology of volatile fatty acids and fermented liquid, applied in chemical instruments and methods, fermentation, contaminated groundwater/leachate treatment, etc., can solve problems such as surrounding water and soil pollution

Active Publication Date: 2019-01-11
北京博泰至淳生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for extracting volatile fatty acids, so as to solve the problem that landfill leachate causes serious pollution to surrounding water bodies and soil in the prior art

Method used

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  • Method for extracting volatile fatty acids
  • Method for extracting volatile fatty acids
  • Method for extracting volatile fatty acids

Examples

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Embodiment 1

[0032] The method that present embodiment extracts volatile fatty acid comprises the following steps:

[0033] (1) Get a certain amount of landfill leachate at the initial stage of landfill from the landfill and put it into the fermenter as a fermentation substrate, and its COD concentration is 15000mg / L;

[0034] (2) Add inoculation sludge to the landfill leachate in step (1), the ratio of landfill leachate volume to inoculation sludge volume is 2:1; add cellulase, hemicellulase, amylase and fruit The multi-enzyme complex composed of gelatinase, the dosing ratio is 5‰ of the sum of the volume of landfill leachate and inoculated sludge;

[0035] (3) Pass nitrogen into the fermenter in step (1) for 10 minutes, seal it, and ferment under anaerobic conditions. Use 2.0mol / L NaOH solution to control the pH value of the fermentation system during the entire fermentation process to 8, control the mechanical stirring to 120r / min, the reaction temperature is about 28°C, and anaerobic fe...

Embodiment 2

[0037] The difference between the method for extracting volatile fatty acids in this embodiment and Example 1 is:

[0038] The volume ratio of landfill leachate to anaerobic digested sludge is 3:1.

Embodiment 3

[0040] The difference between the method for extracting volatile fatty acids in this embodiment and Example 1 is:

[0041] The volume ratio of landfill leachate to anaerobic digested sludge is 6:1.

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Abstract

The invention provides a method for extracting volatile fatty acids. The method comprises the following steps: S1, performing anaerobic fermentation on the landfill leachate by taking landfill leachate as a fermentation substrate and taking anaerobic digested sludge as inoculated sludge, and adding an enzyme catalyst so as to obtain fermentation liquor, wherein the enzyme catalyst comprises any one or multiple in oxidordeuctase, hydrolase and transferase; and S2, performing centrifugal separation on the fermentation liquor, thereby obtaining the supernatant containing the volatile fatty acids.According to the method, the landfill leachate is taken as the raw material, any one or multiple enzyme catalysts in the oxidordeuctase, hydrolase and transferase is / are added to perform anaerobic fermentation and centrifugal separation so as to extract the volatile fatty acids (VFA). The produced VFA can serve as an external carbon source for biological removal of nitrogen and phosphorous in sewage, can also serve as a carbon source for producing biodegradable plastic materials, and achieves the aim of resource recycling while realizing organic wastewater degradation.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to a method for extracting volatile fatty acids. Background technique [0002] Due to its low cost, mature technology, and convenient management, sanitary landfill is currently the main way to dispose of municipal solid waste in my country. However, during the landfill process, due to compaction and microbial biodegradation, the pollutants contained in the garbage dissolve with water to form landfill leachate. Leachate has complex pollution components, COD Cr 、BOD 5 , high concentration of ammonia nitrogen, imbalanced ratio of nutrient elements and other characteristics, if not handled properly, it will cause serious pollution to the surrounding water and soil. Therefore, its disposal has become one of the key issues in the field of environmental protection. [0003] VFA is a widely used carbon source for nitrogen and phosphorus removal in sewage treatment plants, produc...

Claims

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Application Information

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IPC IPC(8): C12P7/64C02F3/28C02F3/34C02F101/30C02F103/06
CPCC02F3/28C02F3/342C02F2101/30C02F2103/06C12P7/6409
Inventor 汪翠萍朱琳琳郑淑文赵婷婷张阳阳
Owner 北京博泰至淳生物科技有限公司
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