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Method for improving straw fermentation for preparing biogas

A technology for straw and biogas, which is applied in the field of improving straw fermentation to prepare biogas, can solve the problems of low utilization rate of resources, difficulty in popularization and application, and high operation cost, and achieves the effects of low cost, strong operability, and solving difficulty in treatment.

Pending Publication Date: 2018-09-25
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to one or more defects such as complex methods, single products, high operating costs, secondary pollution, and low resource utilization, it is difficult to popularize and apply

Method used

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  • Method for improving straw fermentation for preparing biogas

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Example 1: Corn Stalks

[0019] Such as figure 1 As shown, part of the harvested fresh corn stalks was crushed and puffed, and the other part was added with water and humidified and then sealed and stored; the puffed straw was pretreated by adding organic wastewater for 3 days, and the sealed and stored straw was used for animal feed after 15 days; The pretreated puffed straw is mixed with animal manure, and at the same time, animal urine is added for anaerobic fermentation. The biogas residue produced is used for fertilizer making, and the biogas is purified and used as fuel.

[0020] The moisture content of the straw used for puffing treatment shall not exceed 45% before pulverization, and the moisture content of the straw shall be saturated by adding organic waste water after pulverization; the moisture content of the straw used for preparing animal feed shall not be less than 55% before pulverization, and water shall be added for humidification during sealed storage...

example 2

[0027] Example 2: Straw Straw

[0028] Such as figure 1 As shown, the puffed rice straw was added to organic wastewater for pretreatment for 5 days, and the sealed stored straw was used for animal feed after 15 days.

[0029] The moisture content of the straw used for puffing treatment shall not exceed 45% before pulverization, and the moisture content of the straw shall be saturated by adding organic waste water after pulverization; the moisture content of the straw used for preparing animal feed shall not be less than 55% before pulverization, and water shall be added for humidification during sealed storage The water content is more than 80%; the length of crushed straw used for puffing is less than 50 mm, and the crushed length of straw used for preparing animal feed does not exceed 80 mm.

[0030] After the puffing treatment, the volume increases by 1.5 times; 4.5% plant ash is added to the straw pretreatment and mixed evenly; the mixing ratio of the pretreated straw and...

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Abstract

The invention discloses a method for improving straw fermentation for preparing biogas. The method is characterized by comprising smashing harvested fresh straw, then carrying out puffing treatment ona part of the straw, adding water to another part of the straw, humidifying the other part of the straw and then hermetically storing the other part of the straw; adding the straw subjected to puffing treatment into organic wastewater, pretreating the straw for 3-5 days, hermetically storing the straw for 15 days and then utilizing the straw for animal feed; mixing pretreated puffed straw and animal feces with each other to obtain mixtures, adding animal urine into the mixtures, carrying out anaerobic fermentation, utilizing biogas residues for fertilizer preparation, purifying the biogas andthen utilizing the biogas as fuel. The method has the advantages that the biogas yield and the biogas production rate of the biogas prepared from the straw can be increased by the aid of the method,the straw can be completely recycled, the organic wastewater is consumed, and accordingly the problem of environmental pollution due to the straw can be fundamentally solved; the method is free of added substances harmful for environments and is little in environmental influence; the method is simple, is high in operability and has a high practical value, and waste can be truly recycled by the aidof the method.

Description

technical field [0001] The invention relates to the technical field of environmental ecological energy in environmental science and engineering, in particular to a method for improving straw fermentation to prepare biogas. Background technique [0002] With the development of agriculture in our country, a large amount of straw waste is produced, which is randomly dumped and burned to pollute the air and groundwater, seriously affecting the physical and mental health of residents. Promote the resource utilization of straw, while obtaining energy, fundamentally avoid the pollution of straw to the environment. [0003] At present, straw is mainly used for thermal energy utilization, with high operating costs and low utilization rate of resources. The use of straw to prepare biogas produces feed and organic fertilizer auxiliary products at the same time, and the economic value obtained is high. At present, the yield and rate of biogas produced by straw are relatively low, so i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04C05F9/04
CPCA23K10/12C02F11/04C05F9/04C12P5/02Y02E50/30Y02A40/20
Inventor 徐建玲王汉席刘学军
Owner NORTHEAST NORMAL UNIVERSITY
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