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Method of producing methane by utilizing straws and waste wine distillation liquor together

A co-production and straw technology, applied in the direction of waste fuel, fermentation, etc., can solve the problems of low microbial proliferation efficiency, reduced fermentation efficiency, fermentation failure, etc., achieve good application prospects, increase degradation rate, and have no secondary pollution effects

Inactive Publication Date: 2014-12-10
BIOGAS SCI RES INST MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Straw is a raw material with high carbon content, and the use of straw alone for biogas fermentation is prone to "acidification" phenomenon, resulting in fermentation failure; distillery waste liquor is a raw material with high nitrogen content, and biogas fermentation using it alone will cause The imbalance of carbon and nitrogen ratio leads to low microbial proliferation efficiency or growth inhibition, thereby reducing fermentation efficiency or fermentation failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] With a 1L dry fermenter as the fermentation container and straw and liquor factory distillation waste liquid as raw materials, the operation is carried out according to this method, as follows:

[0032] 1. The straw is air-dried and crushed with a straw grinder, with a particle size of about 5 mesh;

[0033] 2. Test the carbon and nitrogen content of straw and distillery waste liquor, the results are as follows:

[0034] project Moisture content (%) Carbon content (%) Nitrogen content (%) carbon to nitrogen ratio straw 5 42 0.63 66.7：1 Distillation Waste 99.5 3.3 0.7 4.7：1

[0035] According to the above measured values, the dosages of rice straw powder and distillery waste liquid are calculated as 100g and 200ml respectively, and the carbon-nitrogen ratio of raw materials is about 23.3:1.

[0036] 3. Weigh (measure) 100g of straw powder, 200ml of distillery waste liquid, and 84ml of distillery flushing wastewater, adjust the pH v...

Embodiment 2

[0040] A method for co-producing biogas with straw and wine distillation waste liquid, comprising the following steps: straw pretreatment, proportioning of the pretreated straw and wine distillation waste liquid, stack retting pretreatment, inoculation and tank fermentation.

[0041] In the straw pretreatment, the air-dried straw with a TS content > 90% is pretreated by crushing or chopping. The particle size of the crushed straw is larger than 5 mesh, and the crushed straw is less than 2 cm / section.

[0042] In the ratio of the pretreated straw and wine distillation waste liquid, the two raw materials are uniformly mixed, and the mass ratio of carbon and nitrogen in the mixture is 20:1.

[0043] In the stack retting pretreatment, add water to the mixture to adjust its water content to 70%, then adjust the pH value to 7.0, mix again and carry out stack retting at normal temperature. The stack retting time is 6 days in summer and 6 days in spring, autumn and winter. 9 days.

...

Embodiment 3

[0050] This embodiment is basically the same as the previous embodiment, the main differences are as follows:

[0051] In the ratio of the pretreated straw and wine distillation waste liquid, the two raw materials are evenly mixed, and the mass ratio of carbon and nitrogen in the mixture is 30:1.

[0052] In the stack retting pretreatment, add water to the mixture to adjust its water content to 75%, then adjust the pH value to 7.0, mix again and carry out stack retting at normal temperature. The stack retting time is 8 days in summer and 8 days in spring, autumn and winter. 11 days.

[0053] In the inoculation step, take out the mixed raw materials after stack retting, adjust the pH value to 7.2 again, add water to adjust the water content to 85%, add biogas fermentation inoculum and mix evenly.

[0054] In the pond-entering fermentation step, the inoculated material is subjected to dry fermentation to produce biogas, the fermentation temperature is 35° C., and the fermentati...

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Abstract

The invention discloses a method of producing methane by utilizing straws and waste wine distillation liquor together. The method comprises the following steps: preprocessing straws, proportioning the preprocessed straws and the waste wine distillation liquor, preprocessing stack retting, transplanting the preprocessed stack retting, and fermenting the preprocessed stack retting in a pool. The method provided by the invention can be used for producing the methane by utilizing the crop straws and the waste wine distillation liquor of a winery at the same time, and no secondary pollution is generated in the process of producing methane.

Description

technical field [0001] The invention relates to a method for jointly producing biogas with straw and wine distillation waste liquid, and belongs to the technical field of organic waste utilization and renewable energy production. Background technique [0002] my country is a large agricultural country, with an annual output of about 700 million tons of straw. With the continuous improvement of people's living standards in our country, the amount of crop straw used as fuel has become less and less. It is estimated that about 400 million tons of remaining straw are dumped and burned randomly, causing a large number of social, economic and ecological problems such as air pollution, soil mineralization, fire accidents, and traffic jams. Crops are rich in raw materials with high carbon content such as cellulose, which can provide carbon elements for biogas production. [0003] Distillery waste liquid is a kind of waste water with high content of organic matter, its pH value is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 李强邓宇尹小波
Owner BIOGAS SCI RES INST MIN OF AGRI
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