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Method for producing biogas from straw

A technology for straw and biogas, applied in the field of straw utilization, can solve the problems of low gas production efficiency, unstable gas production, low straw conversion efficiency, etc., and achieve the effects of improving work efficiency, avoiding blockage and saving costs.

Pending Publication Date: 2018-11-23
张振洋
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Problems solved by technology

However, the gas production of the existing biogas production methods is unstable, the gas production efficiency is low, and the conversion efficiency of the energy of the crop straw is low. How to make better use of the energy in the straw needs us to solve

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Embodiment Construction

[0023] use Figure 1-Figure 2 A method for producing biogas from straw according to an embodiment of the present invention is described as follows.

[0024] Such as figure 1 and figure 2 As shown, a method for producing biogas from straw according to the present invention, the method comprises the following steps:

[0025] Step 1: Grinding the dry straw to 0.1-0.5cm by the crop straw crushing and separation system, adding water and mixing well, the amount of water added should be such that water does not come out from the lower part of the stockpile, then adding fermentation bacteria agent and ammonium bicarbonate and mixing well;

[0026] Step 2: After mixing well in step 1, add anaerobic activated sludge to the biogas digester at a constant temperature of 30°C, adjust the pH of the solution in the biogas digester to 6.8-7.3, anaerobically ferment for 40-70 days, and wait for the production gas;

[0027] Step 3: After the gas is produced in Step 2, feed the crushed straw...

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Abstract

The invention belongs to the technical field of straw energy utilization, in particular to a method for producing biogas from straw. The method comprises the following steps: crushing dried straw to 0.1 to 0.5cm by a crop straw crushing and separating system, and uniformly mixing with water after adding water, wherein the water is added in such a manner that no water is discharged from the lower part of a material pile; then adding a fermentation preparation and ammonia bicarbonate, and mixing uniformly; adding anaerobic activated sludge into a biogas digester under the constant temperature condition of 30 DEG C, adjusting the PH of the solution in the biogas digester to 6.8 to 7.3, performing anaerobic fermentation for 40 to 70 days, and waiting for gas production; feeding crushed straw and spraying water at the same time; discharging a certain amount of fermented waste biogas residue from the lower part of the biogas digester according to the daily feed amount. By adopting the method, energy in the crop straw can be effectively utilized to produce biogas, the yield of biogas is stable, and the conversion efficiency of energy in the straw is high.

Description

technical field [0001] The invention belongs to the technical field of straw energy utilization, in particular to a method for producing biogas from straw. Background technique [0002] As the main waste of agricultural production, straw is about 640 million tons produced in my country every year. At present, it is mainly treated by incineration. The open burning of a large amount of straw not only cannot effectively utilize this part of resources, but also leads to the emission of CO2, SO2 and other gases, pollutes the air, and aggravates global warming. Therefore, to study feasible straw treatment and utilization methods and realize its resource utilization is not only the need for sustainable agricultural development, but also an important way to alleviate the resource, energy and environmental crises that China is facing today. Using crop stalks and livestock manure as fermentation raw materials and biogas reactors as the main form, a new energy-substance circulation de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C12M1/00C12M1/107
CPCC12M21/04C12M45/02C12P5/023C12P2203/00Y02E50/30
Inventor 张振洋
Owner 张振洋
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