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Device and method for producing biogas by plant straw degradation and anaerobic fermentation

A plant straw and anaerobic fermentation technology, applied in the field of waste resource utilization, can solve the problems of high cost, difficult promotion, low gas production rate, etc., and achieve the effects of high gas production rate, wide application range and large processing capacity

Inactive Publication Date: 2018-09-21
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a plant straw degradation and anaerobic fermentation biogas device and use method, overcome the disadvantages of conventional fermentation treatment methods that need to crush plant straw, overcome the shortcomings of high cost and difficult popularization of traditional methods, and solve the traditional method at the same time The problem of low gas production rate

Method used

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  • Device and method for producing biogas by plant straw degradation and anaerobic fermentation
  • Device and method for producing biogas by plant straw degradation and anaerobic fermentation

Examples

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example 1

[0021] Example 1: Preparation of biogas from corn stalks

[0022] like figure 1 and figure 2 As shown, the degradation tank 1 and the fermentation tank 2 are prepared, and the volume of the degradation tank 1 is 70m 3 , the volume of fermentation tank 2 is 52.5m 3 The plant straw 4 is corn straw; the lifting vibrator 7 is set on the wall 12 of the degradation tank 1, and the plant straw 4 and human and animal manure 5 are layered on the support rod 3, and the degrading bacteria are mixed in at the same time. The slag channel 6, by extracting the biogas slurry in the fermentation tank 2, circulates to the ventilation liquid spray port 11 on the top cover plate 10 of the degradation tank 1 and sprays the biogas slurry to adjust the humidity of the corn stalks and human and animal manure 5; The material is transported to the fermentation tank 2 for anaerobic fermentation to prepare biogas through the filter 8, the feed pipe 9, the slag discharge pump 13, the discharge main pi...

example 2

[0030] Example 2: Biogas Production from Rice Straw

[0031] like figure 1 and figure 2 As shown, the degradation tank 1 and the fermentation tank 2 are prepared, and the volume of the degradation tank 1 is 15m 3 , the volume of fermentation tank 2 is 8.25m 3 , the plant straw 4 adopts straw.

[0032]The bottom plate of the degradation tank 1 is a rectangle with a side length of 1.0m at the position of the filter 8, and the other positions are set into a slope shape with a slope of 20°, the position of the filter 8 is the bottom of the slope, and a layer of glass is laid on the upper bottom surface of the entire bottom; The filter 8 in the degradation tank 1 has an aperture of 15mm, the feed pipe 9 has an inner diameter of 80mm, and the ventilation and slag discharge channel 6 for the stacking material has a width of 200mm; 3. The minimum distance from the bottom plate of the degradation tank 1 is 0.3m; the ventilation liquid spray port 11 stops when the amount of biogas ...

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Abstract

The invention discloses a device for preparing biogas through plant straw degradation and anaerobic fermentation and an application method. According to the device, an aim of efficiently preparing biogas through anaerobic fermentation of plant straw is achieved by adopting the plant straw (4) as main raw material and mixing with human and animal excreta (5) and a degradation strain. The device comprises a degradation tank (1) and a fermentation tank (2), wherein the human and animal excreta (5) and the plant straw (4) are stacked in layers in the degradation tank (1), and meanwhile, the degradation bacteria are mixed, and the degraded mixture is conveyed into the fermentation tank (2) through a slag discharge pump (13) for anaerobic fermentation to prepare biogas. The biogas slurry in the fermentation tank (2) is pumped and circulated to a ventilation liquid spray port (11) in a top cover plate (10) of the degradation tank (1) and sprayed in; and the humidity of the plant straw (4) and the human and animal excreta (5) is adjusted to increase the degradation speed. Compared with conventional methods, the plant straw (4) does not need to be ground, the cost is low, the biogas yield is high, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a device and a use method for plant straw degradation and anaerobic fermentation to produce biogas. Background technique [0002] Our country is rich in resources, but with the rapid economic growth, resource consumption is huge, and we are facing an energy crisis, and the resource utilization of waste is an effective way. my country's current Law on the Prevention and Control of Environmental Pollution by Solid Waste and the National Environmental Protection "13th Five-Year Plan" both stipulate that the resource utilization of waste is encouraged to reduce environmental pollution. [0003] Plant stalks are produced in a large amount in agricultural production, which seriously pollutes the air after burning, and they are piled up at random, polluting groundwater. The resource utilization of plant straw is an effective way at present, and the resource utilizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/107C12P5/02C02F11/04
CPCC12M21/04C12M29/04C12M29/18C12M45/06C12P5/023Y02E50/30
Inventor 徐建玲王汉席
Owner NORTHEAST NORMAL UNIVERSITY