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Additive composition for improving methane production rate, and application thereof

A technology of gas production rate and composition, applied in the direction of waste fuel, fermentation, etc., can solve the problems of slow gas production, carbon-nitrogen ratio imbalance, and low gas production, so as to be easy to popularize and apply, enhance the activity of anaerobic bacteria, The effect of increasing pool capacity utilization

Inactive Publication Date: 2012-01-25
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sources of animal husbandry wastes and agricultural and forestry wastes suitable for biogas fermentation in my country are wide and diverse, with a huge amount of resources, but the ingredients of raw materials are single, the nutrition is uneven, the ratio of carbon and nitrogen in the raw materials is out of balance, and the essential elements of microbial metabolism such as phosphorus and potassium and trace metals Low element content, lack of elements to activate bacterial activity, etc., so under natural fermentation conditions, the cycle is long, the gas production is low, the fermentation efficiency is low, the gas production is slow, and the degradation rate of raw materials is low, especially in winter when the temperature is low , the gas production is extremely low or even stopped

Method used

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  • Additive composition for improving methane production rate, and application thereof
  • Additive composition for improving methane production rate, and application thereof
  • Additive composition for improving methane production rate, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 2.0 kg of pre-stacked potato skins and 2.0 L of fermented strains were evenly mixed and loaded into a biogas reactor, and an appropriate amount of water was added to prepare a fermented liquid with a solid concentration of 4%.

[0023] In the first group, 0 g / L of the additive composition was added to the fermentation broth, that is, no additive composition was added.

[0024] The second group, add the additive composition 1 to the fermentation broth, and add the raw materials in the additive composition 1 to the biogas slurry in the following proportions: urea: 0.5g / L; K 2 HPO 4 ·3H 2 O: 0.25g / L; KH 2 PO 4 : 0.15g / L; MgSO 4 ·7H 2 O: 0.05g / L; vitamin B 1 : 0.003g / L; Vitamin B 2 : 0.003g / L and vitamin B 3 : 0.003g / L.

[0025] Control the temperature of the biogas slurry within 27±3°C, and monitor the changes in parameters such as the tank volume gas production rate and methane concentration during the 30-day fermentation process, such as figure 1 and figure 2...

Embodiment 2

[0027] 2.0 kg of pre-stacked potato skins and 2.0 L of fermented strains were evenly mixed and loaded into a biogas reactor, and an appropriate amount of water was added to prepare a fermented liquid with a solid concentration of 4%.

[0028]In the first group, 0 g / L of the additive composition was added to the fermentation broth, that is, no additive composition was added.

[0029] The second group, add the additional composition 2 to the fermentation broth, and add the raw materials in the additional composition 2 to the biogas slurry in the following proportions: urea: 1.00g / L; K 2 HPO 4 ·3H 2 O: 0.75g / L; KH 2 PO 4 : 0.43g / L; MgSO 4 ·7H 2 O: 0.10g / L; vitamin B 1 : 0.005g / L; Vitamin B 2 : 0.005g / L and vitamin B 3 : 0.005g / L.

[0030] Control the temperature of the biogas slurry within 27±3°C, and monitor the changes in parameters such as the tank volume gas production rate and methane concentration during the 30-day fermentation process, such as image 3 and Figu...

Embodiment 3

[0032] 2.0 kg of pre-stacked potato skins and 2.0 L of fermented strains were evenly mixed and loaded into a biogas reactor, and an appropriate amount of water was added to prepare a fermented liquid with a solid concentration of 4%.

[0033] In the first group, 0 g / L of the additive composition was added to the fermentation broth, that is, no additive composition was added.

[0034] In the second group, the additive composition 3 is added to the fermentation broth, and the raw materials in the additive composition 3 are added to the biogas slurry in the following proportions: urea: 1.5g / L; K 2 HPO 4 ·3H 2 O: 1.0g / L; KH 2 PO 4 : 0.55g / L; MgSO 4 ·7H 2 O: 0.3g / L; vitamin B 1 : 0.007g / L; Vitamin B 2 : 0.007g / L and vitamin B 3 : 0.007g / L.

[0035] Control the temperature of the biogas slurry within 27±3°C, and monitor the changes in parameters such as the tank volume gas production rate and methane concentration during the 30-day fermentation process, such as Figure 5 a...

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Abstract

The invention discloses an additive composition for improving methane production rate, which comprises the raw materials based on parts by weight: 0.5-2.0 parts of urea, 0.25-1.50 parts of K2HPO4.3H2O, 0.15-0.85 part of KH2PO4, 0.05-0.5 part of MgSO4.7H2O, 0.003-0.01 part of vitamin B1, 0.003-0.01 part of vitamin B2 and 0.003-0.01 part of vitamin B3. The additive composition for improving methane production rate can be directly added into biogas slurry, thus being convenient and fast for use, time-saving and high in efficiency; after being added into the biogas slurry, the additive composition leads various materials in the biogas slurry to be degraded and fermented, thus accelerating starting, shortening the fermentation period, remarkably improving the activity of strain, increasing the methane production rate, improving the tank volume utilization rate and raw material degradation efficiency, and the like; furthermore, the additive composition for improving methane production rate is wide in source, low in cost and easy for general popularization and application.

Description

technical field [0001] The invention relates to an additive composition for improving biogas production rate and its application. Background technique [0002] Biogas is the most widely used biomass energy in my country. It is a relatively clean renewable bioenergy obtained by anaerobic microorganisms through the degradation of organic matter. It not only has the dual benefits of alleviating energy crisis and controlling environmental pollution, but also because of its strong Cost input and efficient output are highly valued. The sources of animal husbandry wastes and agricultural and forestry wastes suitable for biogas fermentation in my country are wide and diverse, with a huge amount of resources, but the ingredients of raw materials are single, the nutrition is uneven, the ratio of carbon and nitrogen in the raw materials is out of balance, and the essential elements of microbial metabolism such as phosphorus and potassium and trace metals Low element content, lack of el...

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 王永忠廖强彭震朱恂吴睿王宏李俊丁玉栋叶丁丁
Owner CHONGQING UNIV
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