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Method for producing biological methane produced by mixing fermentation of rice straw and farm manure field

A biomethane and mixed fermentation technology, applied in biochemical equipment and methods, gas production bioreactors, fermentation, etc., can solve problems affecting the anaerobic fermentation process of straw, microbial reproduction restrictions, and the impact of straw degradation on methane production. The effect of reducing the occurrence of farmland pests and diseases, reducing production equipment and transportation costs, and reducing emissions

Pending Publication Date: 2020-01-14
湖北正江环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reproduction of fermentation substrate microorganisms requires an appropriate carbon-to-nitrogen ratio. Due to the high carbon content of straw, the reproduction of microorganisms is often limited, which affects the anaerobic fermentation process of straw, which affects the degradation of straw and the production of methane.

Method used

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  • Method for producing biological methane produced by mixing fermentation of rice straw and farm manure field
  • Method for producing biological methane produced by mixing fermentation of rice straw and farm manure field
  • Method for producing biological methane produced by mixing fermentation of rice straw and farm manure field

Examples

Experimental program
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Effect test

Embodiment 1

[0047]A method for producing biomethane (BMF) by mixed fermentation of rice straw and farmyard manure in the field provided by an embodiment of the present invention includes the following steps:

[0048] 1) Preparation of the accumulation pit: select a paddy field with low leakage, and divide the paddy field into 12 sections of 14m after the rice is harvested 2 (7m (length) × 2m (width)) plots, the distance between plots is 0.5m. The soil in the plot is dug out to form a pile-up pit about 20cm deep.

[0049] 2) Configuration of the mixed fermentation substrate: crush the straw (about 5-10cm in length), arrange the rice straw and pig manure according to 125kg:120kg, 100kg:100kg, 80kg:80kg, 70kg:70kg respectively, and mark them as E1 and E2 respectively , E3 and E4), and stir well. At the same time, corresponding controls 120 kg, 100 kg, 80 kg, and 70 kg (marked as CK1, CK2, CK3, and CK4 respectively) were set.

[0050] 3) Interval stacking of fermentation substrate and padd...

Embodiment 2

[0057] A method for producing biomethane (BMF) by mixed fermentation of rice straw and farmyard manure in the field provided by an embodiment of the present invention includes the following steps:

[0058] 1) Preparation of the accumulation pit: select a paddy field with low leakage, and divide the paddy field into 12 sections of 14m after the rice is harvested 2 (7m (length) × 2m (width)) plots, the distance between plots is 0.5m. The soil in the plot is dug out to form a pile-up pit about 20cm deep.

[0059] 2) Configuration of the mixed fermentation substrate: crush the straw (about 5-10cm in length), arrange the rice straw and cow dung according to 125kg:120kg, 100kg:100kg, 80kg:80kg, and 70kg:70kg respectively (marked as C1, C2, C3 and C4), and stir well. At the same time, corresponding controls 120kg, 100kg, 80kg, and 70kg were set up, which were respectively marked as Ck1, Ck2, Ck3, and CK4.

[0060] 3) Interval stacking of fermentation substrate and paddy field soil...

Embodiment 3

[0069] A method for producing biomethane (BMF) by mixed fermentation of rice straw and farmyard manure in the field provided by an embodiment of the present invention includes the following steps:

[0070] 1) Preparation of the accumulation pit: select a paddy field with low leakage, and divide the paddy field into 12 sections of 14m after the rice is harvested 2 (7m (length) × 2m (width)) plots, the distance between plots is 0.5m. The soil in the plot is dug out to form a pile-up pit about 20cm deep.

[0071] 2) Configuration of mixed fermentation substrate: crush straw (about 5-10cm in length), arrange rice straw and sheep manure according to 125kg:120kg, 100kg:100kg, 80kg:80kg, 70kg:70kg respectively, and stir evenly. Label as D1, D2, D3 and D4 respectively and stir well. At the same time, corresponding controls 120 kg, 100 kg, 80 kg, and 70 kg (marked as CK1, CK2, CK3, and CK4 respectively) were set.

[0072] 3) Interval stacking of fermentation substrate and paddy fiel...

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Abstract

The present invention belongs to the technical field of harmless utilization of rice straw and discloses a method for producing biological methane produced by mixing fermentation of rice straw and farm manure field. Rice field with relatively low leakage is selected and the soil is taken out; the straw is crushed and mixed with farm manure to be prepared into a fermentation substrate; a mixture and the rice soil are piled alternately in 6 layers in a soil pit to form a ridge, a deep trench with a width of 5 cm and a depth of 25 cm is dug around the ridge, and the fermentation substrate is comprehensively covered by using a covering film; the rice field is irrigated with water to form an anaerobic fermentation environment; an air collection valve of a biological methane collection bag is connected with an air outlet valve of the covering film, and air collection state of an air collection bag is regularly observed. The method reduces production equipment and transportation costs, solvesa harmless disposal problem of the farm manure, improves yield of the biological methane, improves soil fertility, reduces field pests and diseases, achieves a purpose of harmless treatment of the field straw, and is worthy of popularization and use.

Description

technical field [0001] The invention belongs to the technical field of harmless utilization of rice straw, and in particular relates to a method for producing methane by mixed fermentation of rice straw and farm manure in the field. Background technique [0002] Currently, the closest prior art: [0003] Rice is the main food crop in China, and the annual output of rice straw reaches 1.752×108t. Bio-feed, biomass power generation, straw returning and anaerobic fermentation are the four main utilization methods of rice straw. Due to the low nutrient content of straw, high transportation costs and the generation of greenhouse gases, the application of rice straw in bio-feed, biomass power generation and straw returning to the field is limited. The method of producing biomethane through anaerobic fermentation of straw can undoubtedly solve the above problems. Anaerobic fermentation of straw is divided into tank (pool) body fermentation and field fermentation. The former is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C12M1/107C02F11/04
CPCC12P5/023C12M21/04C12M23/14C12M23/18C12M23/26C12M23/36C02F11/04Y02E50/30
Inventor 陈芳清耿启明张行黄永文秦凯刘杨赟
Owner 湖北正江环保科技有限公司