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Accelerant for producing biogas by straw anaerobic digestion as well as preparation method and application thereof

An anaerobic fermentation and accelerator technology, which is applied in fermentation, waste fuel, etc., can solve the problems of ineffective promotion of gas production, unstable effect of biogas accelerator, large dosage, etc. The effect of air volume improvement

Inactive Publication Date: 2013-02-13
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of unstable effect of existing biogas accelerators, insignificant effect of promoting gas production, and excessive dosage, and to invent a composite accelerator with wide application range and stable and reliable effect, which only needs to be put into the biogas digester in a small amount. Stirring evenly can adjust the micro-ecological environment and microbial flora in the biogas digester, improve the nutritional status of the fermented product, and increase the anaerobic biological conversion rate and conversion efficiency of straw

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Biogas production accelerator powder (hereinafter referred to as accelerator):

[0022] Weigh 0.1 gram of cobalt chloride, 0.2 gram of nickel chloride, 570 gram of superphosphate (P 2 o 5 The content is about 68 grams), 150 grams of wheat bran, 50 grams of sodium pyruvate, 49 grams of fly ash, 180 grams of bentonite and 0.7 grams of ferrous chloride, respectively baked at 50 ° C for 24 hours, crushed through a 100-mesh sieve After mixing evenly, it is made into 1 kg of biogas-producing accelerator powder.

[0023] The anaerobic fermentation experiments of the experimental group and the control group were carried out in 1L glass reactors.

[0024] The experimental group used accelerators.

[0025] The straws used in the experimental group and the control group were wheat straws chopped into 2-3 cm segments, and the inoculum was domesticated anaerobic digested sludge (hereinafter referred to as sludge), and the sludge before domestication was taken from the sewag...

Embodiment 2

[0032] Biogas production accelerator powder:

[0033] Weigh 0.1 gram of cobalt chloride, 0.2 gram of nickel chloride, 570 gram of superphosphate (P 2 o 5 The content is about 68 grams), 150 grams of wheat bran, 50 grams of sodium pyruvate, 210 grams of fly ash, 19.5 grams of bentonite and 0.2 grams of ferrous chloride, baked at 50 ° C for 24 hours, crushed through a 100-mesh sieve and mixed Evenly, make 1 kg of biogas accelerator powder.

[0034] The anaerobic fermentation experiments of the experimental group and the control group were carried out in 1L glass reactors.

[0035] The experimental group used accelerators.

[0036] The straws used in the experimental group and the control group were all wheat straws chopped into 2-3 cm segments, and the inoculum was the same sludge.

[0037] experiment procedure:

[0038] Experimental group: Put 48 grams (dry matter) of wheat straw crushed to a length of 2 to 3 cm into a 1L glass reactor, add 600 grams of sludge, and adj...

Embodiment 3

[0043]Using the same anaerobic fermentation device as in Example 2, the same accelerator and its dosage, and the same experimental process, the only difference from Example 2 is that the straw used is 48 grams of rice straw crushed to a length of 2 to 3 cm. (dry matter).

[0044] Experimental results: The cumulative gas production of the experimental group was 15888±664mL, and the cumulative gas production of the control group was 12970±423mL. The cumulative gas production of the experimental group was 22.5% higher than that of the control group.

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Abstract

The invention discloses an accelerant for producing biogas by straw anaerobic digestion as well as a preparation method and application of the accelerant. The accelerant is prepared from microelements, phosphate, pyruvate, fly ash and bentonite, wherein the microelements include iron, cobalt, nickel and the like. The specific using method is as follows: during straw type anaerobic digestion, the addition amount of the biogas accelerant is 10-50% of the total amount of an accelerant liquid, the biogas accelerant is directly fed in a biogas fermentation tank in a loading process and stirred uniformly; during straw high-concentration or dry-type anaerobic digestion, the addition amount of the biogas accelerant is 10-30% of the total amount of the accelerant liquid, the biogas accelerant is dissolved in an inoculum firstly, mixed uniformly together with the inoculums and the straw, and then fed in the biogas fermentation tank, and finally the accelerant is obtained. With the adoption of the accelerant, because the biogas accelerant contains composite materials which are beneficial for hydrolysis acid production microorganisms as well as biogas bacteria activities, the biogas yield of straw dry materials can be increased by15-25%.

Description

technical field [0001] The invention relates to a biogas-producing accelerator by anaerobic fermentation of straw, a preparation method and application thereof, and belongs to the field of renewable energy development and utilization and environmental protection. Background technique [0002] Today, as fossil energy is gradually exhausted, the impact of energy shortage on the world has become increasingly prominent, and the world has begun to focus on the field of new energy. Among many new energy sources such as solar energy, nuclear energy, water energy, and biomass energy, biomass energy is the safest and most stable energy source, and it is also a new energy field that is currently encouraged by the state. The world's biomass resources are huge and diverse, including all terrestrial plants, aquatic plants, human and animal excreta, and industrial organic matter. Among all kinds of biomass available for human use, lignocellulosic raw materials account for the vast majori...

Claims

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Application Information

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IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 陈广银马慧娟叶小梅杜静常志州
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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