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Method for producing biogas by micro-reaction thermal-explosion straw fermentation

A technology of micro-reaction and thermal explosion, applied in microorganism-based methods, fermentation, biochemical equipment and methods, etc., can solve problems such as difficult slag discharge, achieve large gas production, eliminate toxic and harmful substances, and solve cellulose crusting slag effect

Inactive Publication Date: 2010-07-07
安徽安生生物化工科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the defect of difficult slag removal in the method of producing biogas by straw fermentation, and aims to provide a new method for producing biogas by fermenting straw and forest waste biomass. slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Cut rice straw into 3-4 cm, inject 3% v / v sulfur trioxide until the pressure in the bottle is ≤0.1 MPa, keep it in a water bath at 50°C for 1 hour, add 1% NaOH, the solid-liquid ratio is 1:10, Process for 4 hours; after separation, wash with water and dry for later use. In a 1L anaerobic fermentation tank, add 100g of pretreated straw, 20g of sludge, inoculum concentration of methanogens at 10% (v / m), add a small amount of water, seal, and anaerobically ferment at 45±5°C for 14 days, Methane production was 51-67 mL / g TS.

Embodiment 2

[0018] Embodiment 2: The wheat straw is cut into 3-4 cm, and 10% v / v sulfur trioxide is passed into the bottle until the pressure in the bottle is ≤0.1 MPa, and the water bath is kept at 50° C. for 1 hour, and 2% NaOH is added, and the solid-liquid ratio is 1:10. Process for 4 hours; after separation, wash with water and dry for later use. In a 1L anaerobic fermentation tank, add 100 g of pretreated stalks, and the inoculation amount of Trichoderma is 10 mL (spore suspension is 10 7 per mL), after 7 days of aerobic fermentation at room temperature, add 20 g of sludge, then add 50 g of pretreated rice straw, inoculum concentration of methanogenic bacteria is 10% (v / m), add a small amount of water, seal, 45±5 After anaerobic fermentation at ℃ for 8 days, the methane production was 104-120mL / g TS.

Embodiment 3

[0019] Example 3: Soybean stalks were cut into 3-4 cm, 10% v / v sulfur trioxide was introduced until the pressure in the bottle was ≤0.1 MPa, the water bath was kept at 50°C for 1 hour, 2% NaOH was added, and the solid-to-liquid ratio was 1:10. Process for 4 hours; after separation, wash with water and dry for later use. In a 1L anaerobic fermentation tank, add 100g of pretreated straw, add cellulose crude enzyme solution 20FIU (filter paper enzyme activity) / g (per gram of substrate), hydrolyze at 45±5°C for 18 hours, add 20g of sludge, Then add 50 g of pretreated rice straw, insert 10% of Pseudomonas aeruginosa (OD value is 2), inoculum concentration of methanogens is 10% (v / m), add a small amount of water, seal, and dry at 45±5°C. After 7 days of oxygen fermentation, the methane production was 126-134mL / g TS.

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PUM

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Abstract

The invention discloses a method for producing biogas by micro-reaction thermal-explosion straw fermentation. The farm product straws and the wastes from forest and wood processing are used as the raw material. The raw material is firstly pretreated for micro-reaction thermal-explosion by attenuate sulfur trioxide gas and then fermented in anaerobic condition to produce biogas; the pretreated straws, methanogenic bacteria or (and) pseudomonas aeruginosa are fermented in anaerobic condition for 7-14 days and under 40-50 DEG C in an anaerobic fermentation vat. The method guarantees high usage of straw fibrin, tremendous biogas production, and no residue except for biogas and biogas slurry, effectively solving the problem that fibrin encrusts to form residues.

Description

1. Technical field [0001] The invention relates to a method for producing biogas by fermenting biomass such as straws, in particular to a method for producing biogas by micro-reaction heat-exploding straws for fermenting. 2. Background technology [0002] The wastes after the use of crops (straw, rice husk, corn cob, bagasse), forest weeds, forest trees and their processed products, waste paper and sawdust can all be used as lignocellulose raw materials, which can be hydrolyzed to produce sugar by biological methods. Subsequent fermentation produces chemical products such as ethanol, butanol, butyric acid and lactic acid. At present, people's attention is mainly focused on the development of bio-energy such as cellulosic ethanol. Using the cellulose contained in trees, straw and other plants to produce ethanol fuel, the greenhouse gas released can be reduced by 82% to 85% compared with gasoline. [0003] In fact, biogas produced by anaerobic fermentation of straw and other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P39/00C12P5/02C12R1/01C12R1/885C12R1/385
CPCY02E50/343Y02E50/30
Inventor 崔玉杰王蕴怡邓胜松张遥姚力蓉余三喜
Owner 安徽安生生物化工科技有限责任公司
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