Method for preparing biogas by using peat as raw material

A technology of peat and biogas, applied in the direction of waste fuel, fermentation, etc., can solve the problems of single product development, low product technology level, and low product added value, so as to increase gas production, expand product categories, and facilitate diversification Effect

Inactive Publication Date: 2013-03-27
INNER MONGOLIA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, my country is rich in peat resources, and the development of products is single and mostly concentrated on fertilizers and substrates. The technological level of products is not high, and the added value of products is low. Study the corresponding pretreatment methods to solve the problem of peat degradation and conversion, increase the yield of biogas, truly realize the industrialization and industrialization of peat conversion, expand the use of peat, increase the added value of peat, and improve the economic benefits of peat mining and utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Take natural air-dried peat and crush it to 60 mesh, take 3g of peat fine powder after collection, add 1ml of cellulase and xylanase enzyme liquid mixture (0.7ml of cellulase and 0.3ml of xylanase) at 37°C Enzymolysis for 6 hours, adding activated sludge with a mass fraction of 30%, adding water to adjust the solid-liquid ratio to 1:8, adding sodium hydroxide solution to adjust the pH to 7.0, fermenting at 50°C for 20 days, stirring the fermented product 3 times a day during the fermentation process, 53ml of biogas was collected by saturated salt water drainage and gas collection method, and the methane content in the biogas was determined to be 60% by gas chromatography.

Embodiment 2

[0018] Example 2: Take natural air-dried peat and crush it to 40 meshes. After collection, take 2g of peat fine powder, add 0.5ml of xylanase enzyme solution at 37°C for 3 hours, add activated sludge with a mass fraction of 25%, and add water to adjust the solid-liquid Ratio 1:8, add sodium hydroxide solution to adjust the pH to 7.5, ferment at 35°C for 15 days, stir the fermented material in the fermentation device 4 times a day during the fermentation process, collect 28ml of biogas by draining and collecting saturated salt water, and measure it by gas chromatography The methane content of the biogas is 58%.

Embodiment 3

[0019] Example 3: Take natural air-dried peat and crush it to 60 mesh. After collection, take 1g of peat fine powder, add 0.4ml of cellulase enzyme solution at 50°C for 5 hours, add activated sludge with a mass fraction of 30%, and add water to adjust the solid-liquid ratio 1:7, add sodium hydroxide solution to adjust the pH to 6.9, ferment at 50°C for 10 days, stir the fermented material in the fermentation device 5 times a day during the fermentation process, collect 14ml of biogas by means of saturated salt water drainage and gas collection, and measure the biogas by gas chromatography The methane content in it is 65%.

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PUM

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Abstract

The invention belongs to the field of peat reclamation application, and particularly relates to a method for preparing biogas by using peat as a raw material. The method is characterized in that enzyme liquid is added for enzymolysis after the peat is pretreated, activated sludge is mixed for fermenting the biomass, and the content of methane in the biogas is determined to reach 65%. The method has the advantages that energy contained in a peat organic matter is released through an appropriate treatment technology and is converted into biomass energy source biogas, so that the purpose of only using the peat as the raw material for preparing the biogas through anaerobic fermentation is achieved, a new path for comprehensive utilization of abundant peat is opened up, fossil energy can be partly replaced or saved, and the low-carbon cyclic economic development and clean energy substitution are realized in the end.

Description

technical field [0001] The invention belongs to the application field of peat resources, and in particular relates to a method for preparing biogas by using peat as a raw material. Background technique [0002] Peat, also known as peat or peat, is the coal with the lowest degree of coalification and the most primitive state of coal. It is a natural swamp product formed for thousands of years. It is sterile, non-toxic, non-polluting, and has good ventilation performance. It has the characteristics of water retention, fertilizer retention, breathability and rich organic matter. my country is one of the big countries rich in peat resources in the world. Peat is a non-metallic mineral resource with high utilization value in agriculture, industry, medicine, etc. The development and utilization of peat as a soil improver and organic fertilizer substrate has achieved relatively rapid development in my country. Peat generally has a high ash content. If it is directly used as fuel,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 马力通李珺蔡禄
Owner INNER MONGOLIA UNIV OF SCI & TECH
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