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Method for improving yield of methane produced by anaerobic digestion of biomass raw materials

A biomass raw material and anaerobic digestion technology, which is applied in the field of improving anaerobic digestion of biomass raw materials and increasing methane production, can solve the problems of low output value and insufficient supply of reducing power, and achieve the advantages of increasing average content, shortening fermentation period and increasing yield. Effect

Active Publication Date: 2014-11-19
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biomass anaerobic digestion of methane, as a typical anaerobic fermentation process, also has the phenomenon of insufficient supply of reducing power, resulting in low methane production value, but there are few reports on the regulation of reducing power in activated sludge anaerobic fermentation system fermentation process research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 The present invention illustrates the method for improving the yield of methane produced by anaerobic digestion of biomass raw materials

[0023] Specific steps are as follows:

[0024] (1) Chop the wheat straw raw material into small pieces of 3cm, set aside;

[0025] (2) The biogas residue from the old biogas digester is used as the inoculum for use as an inoculum;

[0026] (3) In an anaerobic digester with an effective volume of 5L, add the dry matter of the biomass raw material of the above (1) and the inoculum of the above (2), adjust the C / N ratio to 25:1, and calculate the effective volume per L Add hemin or vitamin K in the amount of 1mg 2 5mg, and finally replenished with water until all materials in the entire anaerobic digester were 4L, and the initial pH was adjusted to 7.0; wherein, in the above 4L, the dry weight of the biomass raw material was 240g, and the inoculum was 2.4kg.

[0027] (4) Close the anaerobic digester, control the rea...

Embodiment 2

[0029] Embodiment 2 The present invention illustrates the method for improving anaerobic digestion of biomass raw materials and increasing methane production

[0030] Specific steps are as follows:

[0031] (1) Chop the rice straw raw material into small pieces of 5cm and set aside;

[0032] (2) Take spoiled river mud as the inoculum and set aside;

[0033] (3) In an anaerobic digester with an effective volume of 5L, add the dry matter of the biomass raw material of the above (1) and the inoculum of the above (2), adjust the C / N ratio to 30:1, and calculate the effective volume per L Add hemin or vitamin K in the amount of 10mg 2 50mg, and finally make up to 4L of all materials in the entire anaerobic digester with water, and adjust the initial pH to 7.6; wherein, the above 4L contains 400g of biomass raw materials, and the inoculum is 2.4kg.

[0034] (4) Close the anaerobic digester, control the reaction temperature at 35±2°C, and shake the materials in the digester a...

Embodiment 3

[0036] Embodiment 3 The present invention illustrates the method for improving anaerobic digestion of biomass raw materials and increasing methane production

[0037] Specific steps are as follows:

[0038] (1) Chop the corn stalks into small pieces of 4cm and set aside;

[0039] (2) Take the anaerobic digested sludge from the urban sewage treatment plant as the inoculum and reserve it;

[0040] (3) In an anaerobic digester with an effective volume of 5L, add the dry matter of the biomass raw material of the above (1) and the inoculum of the above (2), adjust the C / N ratio to 30:1, and calculate the effective volume per L 50mg of added hemin or vitamin K 2 250mg, and finally make up with water until all materials in the entire anaerobic digester are 4L of the effective volume of the reaction vessel, and adjust the initial pH to 7.6; wherein, in the above 4L, the dry weight of the biomass raw material is 280g, and the inoculum is 2.4kg.

[0041] (4) Close the anaerobic di...

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PUM

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Abstract

The invention discloses a method for improving output of methane produced by anaerobic digestion of inferior biomass raw materials, and belongs to the technical field of agricultural waste treatment. According to the method, various waste inferior biomass raw materials is used as a processing object, trace of electronic carrier hemin or vitamin K2 is added into an anaerobic reactor to improve the reducing force level of the whole fermentation system of biogas anaerobic fermentation so as to promote the growth and activity of hydrolytic acidification bacteria and methanogenic bacteria in the anaerobic digestion process, and the hydrolysis efficiency of the reaction system is improved, the anaerobic digestion time is shortened, and the yield of the methane and the conversion rate of the inferior biomass raw materials are improved. Due to the addition of extremely trace hemin and vitamin K2, industrial grade hemin and vitamin K2 are also applicable to the method, and the method has the advantages of simple operation and high efficiency and low cost, and is expected to be widely used in engineering practice.

Description

technical field [0001] The invention belongs to the technical field of agricultural waste treatment, and in particular relates to a method for improving anaerobic digestion of biomass raw materials and increasing methane production. Background technique [0002] The use of renewable biomass resources to produce biomass energy that can replace fossil energy has attracted increasing attention. At present, biomass energy utilization technologies include solidification molding, thermochemical conversion, and anaerobic fermentation. Among them, the anaerobic fermentation technology represented by methane-producing fermentation mainly uses anaerobic microorganisms to convert biomass into CH 4 , CO 2 or H 2 . CH 4 It has a high combustion calorific value (802.3 kJ / mol), and is an ideal energy substance. Anaerobic fermentation technology can realize environmental purification while producing clean energy, and the fermentation residue can also be used as organic fertilizer, whi...

Claims

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Application Information

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IPC IPC(8): C12P5/02
CPCY02E50/30
Inventor 奚永兰常志州叶小梅徐蓉杜静陈广银
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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