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Method for improving methane production performance of pig manure based on coupling of biogas circulation and activated carbon

A technology for methane production and activated carbon, which is applied in chemical instruments and methods, water/sludge/sewage treatment, animal husbandry wastewater treatment, etc. The effect of conversion, promotion of development and utilization, and improvement of carbon conversion rate

Pending Publication Date: 2022-04-12
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low organic matter degradation efficiency and slow reaction in the process of processing livestock and poultry manure by traditional anaerobic digestion technology, which leads to high investment and operation costs. Promote the full contact between hydrolytic enzymes / microbes and substrates, strengthen the enzymatic reaction of the system and microbial metabolic activity, thereby improving the degradation efficiency of organic matter and the performance of methane production, so as to shorten the fermentation time and reduce investment and operation costs

Method used

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  • Method for improving methane production performance of pig manure based on coupling of biogas circulation and activated carbon
  • Method for improving methane production performance of pig manure based on coupling of biogas circulation and activated carbon
  • Method for improving methane production performance of pig manure based on coupling of biogas circulation and activated carbon

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Embodiment 1

[0039] Such as figure 1 As shown, a method for improving the methane production performance of pig manure based on biogas circulation coupled with activated carbon comprises the following steps:

[0040] 1) Inoculate the anaerobic sludge domesticated through pig manure into the anaerobic reactor (4) with substrate pig manure built-in. In this embodiment, the volume of the anaerobic reactor (4) is 2L, according to VS( Volatile solids), the mass ratio of the inoculated anaerobic sludge and the substrate pig manure is 2:3, and distilled water is added, mixed uniformly, and the TS (total solids) content is adjusted to be 5%, and the pH value is adjusted to 7.5 simultaneously; Add 5.0g / L powdered activated carbon to the anaerobic reactor, and the powdered activated carbon is sieved through a 40-mesh sieve; mix and stir evenly;

[0041] 2) Use the sealing plug (14) to strictly seal the bottleneck of the anaerobic reactor (4) to ensure the anaerobic condition. In the sealing plug (1...

Embodiment 2

[0048] The difference from Example 1 is that

[0049] 1) In the step, the anaerobic sludge domesticated by pig manure is inoculated into the anaerobic reactor (4) with built-in substrate pig manure, and the mixture of anaerobic sludge and substrate pig manure is inoculated according to the volatile solids. The mass ratio is 2:2.8, and distilled water is added, mixed evenly, the total solid content is adjusted to 5.0%, and the pH value is adjusted to 7.5 at the same time; then 4.5g / L powdered activated carbon is added to the anaerobic reactor, and the powdered activated carbon is passed through a 40-mesh sieve Sieve; mix and stir evenly;

[0050] 4) In the step, set the flow rate of the miniature vacuum pump to 150mL / min, turn it on for 1 hour and turn it off for 1 hour, and repeat the on / off intermittent operation at regular intervals;

[0051] Other steps are consistent with embodiment 1.

Embodiment 3

[0053] The difference from Example 1 is that

[0054] 1) In the step, the anaerobic sludge domesticated by pig manure is inoculated into the anaerobic reactor (4) with built-in substrate pig manure, and the mixture of anaerobic sludge and substrate pig manure is inoculated according to the volatile solids. The mass ratio is 2:3.2, and distilled water is added, mixed, the total solid content is adjusted to 5.0%, and the pH value is adjusted to 7.5 at the same time; then 5.5g / L powdered activated carbon is added to the anaerobic reactor, and the powdered activated carbon is sieved through a 40-mesh sieve sieve; mix and stir evenly;

[0055] 4) In the step, set the flow rate of the miniature vacuum pump to 250mL / min, turn it on for 1 hour and turn it off for 1 hour, and repeat the on / off intermittent operation at regular intervals;

[0056] Other steps are consistent with embodiment 1.

[0057] Such as figure 1 Shown, above-mentioned embodiment uses device, comprises aerator (...

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Abstract

The invention discloses a method for improving the methane production performance of pig manure based on coupling of biogas circulation and activated carbon. Belongs to the field of efficient resource utilization of organic solid wastes. The invention solves the problem of high investment and operation cost caused by low organic matter degradation efficiency and slow reaction in the livestock and poultry manure treatment process of the traditional anaerobic digestion technology. The activated carbon is coupled through biogas circulation, full contact between hydrolase / microorganisms and a substrate is promoted, the enzymatic reaction and microbial metabolic activity of a system are enhanced, interspecific electron transfer is enhanced, and the hydrolytic acidification efficiency and methane production performance of organic matter are improved, so that the carbon conversion rate is increased, and efficient energy conversion of organic waste is achieved. Technical support is provided for efficient and stable operation of an anaerobic digestion system, and low-carbon treatment of livestock and poultry wastewater and development and utilization of clean energy are promoted.

Description

technical field [0001] The invention relates to the field of high-efficiency resource utilization of organic solid waste, in particular to a method for improving the methane production performance of pig manure based on biogas circulation coupled with activated carbon. Background technique [0002] With the rapid development of people's life and economic level in our country, the output of organic solid waste in various fields shows a trend of continuous increase. Anaerobic digestion is a biological treatment technology to realize the resource utilization of organic solid waste, which can convert organic matter into biogas to achieve efficient resource utilization. Although the anaerobic digestion technology has developed rapidly due to its environmental friendliness, the chemical composition of the organic matter in livestock and poultry manure is very complex, and contains many refractory macromolecules, which has caused the traditional anaerobic digestion technology to be...

Claims

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Application Information

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IPC IPC(8): C02F11/04C02F103/20C02F101/30
Inventor 黄薇薇候耀歧黄文力王旭
Owner HAINAN UNIVERSITY