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System and method for producing methane through fermenting of mixed raw material

A technology for mixing raw materials and biogas, which is applied in biochemical equipment and methods, fermentation, gas production bioreactors, etc., can solve problems such as the effect of fermentation effect, and achieve the benefits of subsequent anaerobic digestion, saving production water, and improving gas production efficiency. Effect

Inactive Publication Date: 2012-12-26
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual biogas production site, the mixed fermentation materials in the fermenter will be naturally stratified, and the straw will be suspended on the upper part of the fermentation liquid and form a thick crust layer, which cannot be mixed evenly with the feces to achieve mixed anaerobic fermentation, and the fermentation effect will be seriously affected. influences

Method used

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  • System and method for producing methane through fermenting of mixed raw material
  • System and method for producing methane through fermenting of mixed raw material
  • System and method for producing methane through fermenting of mixed raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 , figure 2 As shown, a system for producing biogas by fermentation of mixed raw materials is manufactured.

[0024] figure 1 It is a schematic diagram of the system structure for producing biogas by fermentation of mixed raw materials. A system for producing biogas by mixing raw materials by fermentation, including a raw material pool, a mixing pool 2, an anaerobic fermentation tank 3, and a sedimentation tank 4 connected sequentially by sealed pipes; a water supply / material device 5 is installed in the raw material pool, and a stirring device 21 is installed in the mixing tank With water / feeding device5. The raw material pool includes a carbon-rich biological raw material pool 11 and a nitrogen-rich biological raw material pool 12 respectively connected to the mixing pool 2; a water delivery / material device 5 is installed in the sedimentation tank 4, and is respectively connected to the carbon-rich biological raw material pool 11 and the nitrogen-r...

Embodiment 2

[0028] The system for producing biogas by fermentation of mixed raw materials described in Example 1 is used to produce biogas, and the schematic diagram of its process flow is as follows image 3 .

[0029] 1. Biological raw materials:

[0030] The carbon-rich biological raw material is natural dried ordinary farmland straw, crushed to 3mm ~ 10mm coarse grain, and the moisture content is measured by conventional sample drying method; the nitrogen-rich biological raw material is selected from rural livestock and poultry manure, and the conventional sample drying method is dried to measure the moisture content .

[0031] 2. Production process

[0032] Take 16Kg (DW) of coarse grain straw and put it into the carbon-rich biological raw material pool 11, add water to adjust to a moisture content of 60% to 65%; take 150Kg (DW) of livestock and poultry manure and put it into the nitrogen-rich biological raw material pool 12, add water to adjust to the TS concentration 3% to 8%; t...

Embodiment 3

[0034] The system for producing biogas by fermenting mixed raw materials described in Example 1 is used to produce biogas. The same parts as in Example 2 will not be repeated, except that the carbon-rich biological raw materials are pretreated.

[0035] Bacterial Mixture: Contains Trametes hirsuta and Trametes versicolor and the activator yeast powder required for the growth of the strains.

[0036] The pretreatment process of carbon-rich biological raw materials is as follows: take 16Kg (DW) of straw coarse grains and put them into the carbon-rich biological raw material pool 11, add water to adjust to a moisture content of 60% to 65%; W / W); Fermentation after inoculation for 3 to 4 days at a temperature of 25°C to 40°C.

[0037] After the treatment, it is sent to the mixing tank 2 to mix with the prepared livestock and poultry manure at a ratio of 1:9 to 2:8 (DW / DW) to continue the subsequent process steps.

[0038] The detailed pretreatment process adopts the bio-chemical ...

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Abstract

The invention discloses a system and a method for producing methane through fermenting of mixed raw materials. The invention solves shortcomings that the carbon-enriched biomass raw materials and nitrogen-enriched biomass raw materials in a production system for producing the methane through the fermenting of the mixed raw materials cannot be fully mixed. The system producing the methane through the fermenting of the mixed raw materials comprises a raw material tank, a mixing tank, an anaerobic fermenting cylinder, a depositing tank which are connected in sequence through pipelines, wherein the raw material tank is divided into carbon-enriched and nitrogen-enriched biomass raw material tanks which are independently connected in parallel; cycling shall breaking devices are distributed in the anaerobic fermenting cylinder; a carbon-enriched biomass raw material shell layer on fermenting liquid can be broken and fully mixed with the nitrogen-enriched biomass raw materials through stable convection under a negative pressure. The invention also provides a method for producing the methane through the the fermenting of the mixed raw materials. The system is simple in structural design and low in construction cost; fermenting efficiency is greatly improved, gas output is increased, and water for production can be saved, and times for manually discharging slag are reduced. With adoption of the system and the method, demands on concentrated use in rural families can be met.

Description

technical field [0001] The invention relates to a biogas production system and method, in particular to a biogas production system and method using mixed raw materials, and belongs to the field of anaerobic fermentation methane production. Background technique [0002] Energy crisis and environmental pollution are two major environmental problems that the world is facing at the same time. Waste reduction, harmless treatment and resource utilization have become common concerns and urgent technical issues for governments and scientists around the world. At present, agricultural non-point source pollution caused by agricultural waste, such as rural livestock and poultry breeding pollution and crop straw burning, has become one of the most important sources of rural environmental pollution in my country, and is one of the technical problems faced by my country's rural ecological environment governance. The construction of rural biogas projects, the production and comprehensive u...

Claims

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Application Information

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IPC IPC(8): C12M1/107C12M1/02C12P5/02
CPCY02E50/343C12M21/04C12M23/18C12M23/34C12M27/00C12M29/06Y02E50/30
Inventor 闫志英刘晓风袁月祥廖银章
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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