Method for improving methane yield by organic waste water anaerobic fermentation

A technology of organic wastewater and anaerobic fermentation, applied in fermentation, waste fuel, biological sludge treatment, etc., can solve the problems affecting the operation effect and stability of anaerobic reactor, unfavorable growth of methanogens, utilization of cobalt methanogens, etc. problems, to achieve the effect of improving bioavailability, improving conversion rate, and increasing methane production

Inactive Publication Date: 2008-04-09
JIANGNAN UNIV
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Problems solved by technology

Among them, the trace element cobalt is closely related to the activity of the enzyme, either as an active component of the enzyme, or as an activator of the enzyme. The presence of cobalt is not only beneficial to the synthesis of methanogenic microbial cells, but also promotes the synthesis or activation of enzymes. Enzymes that play a catalytic role in biochemical reactions, on the contrary, the lack of cobalt is not only unfavorable to t

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0014] The influent of the anaerobic reactor is simulated organic wastewater, and the water quality is as follows: the COD concentration is 3000 mg / L, the COD:N:P is 200:5:1, the pH value is 7.0, and the addition amount of cobalt and serine chelating agent is 2 μmol / L. L. Under the same experimental conditions, the maximum methane production measured by the lye absorption method was 151 mL, which was 84% ​​higher than that of the control sample.

Embodiment 2

[0016] The influent of the anaerobic reactor is simulated organic wastewater, and the water quality is as follows: the COD concentration is 5000 mg / L, the COD:N:P is 200:5:1, the pH value is 8.0, and the addition amount of cobalt and serine chelating agent is 10 μmol / L. L. Under the same experimental conditions, the maximum methane production measured by the lye absorption method was 144 mL, which was 75% higher than that of the control sample.

Embodiment 3

[0018] The influent of the anaerobic reactor is simulated organic wastewater, and the water quality is as follows: the COD concentration is 5000mg / L, the COD:N:P is 200:5:1, the pH value is 6.8, and the addition amount of cobalt and lysine chelating agent is 2μmol / L. Under the same experimental conditions, the maximum methane production measured by the lye absorption method was 148 mL, which was 81% higher than that of the control sample.

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Abstract

The invention relates to a method used for raising the output of marsh gas by using anaerobic fermentation of organic effluent water, which pertains to the technical field of biological treatment of effluent water. The invention adopts simulated organic effluent water or practical wastewater from chemical industry as treatment objects, by adding trace metal element Co and metal ion chelating agent to an anaerobic reactor to improve the biological availability of trace metal elements which are essential for methanogen and promote the growth and activity of methanogen, thereby, methane output and transformation efficiency of contaminating material of the system is improved. The method needs only extreme micro-amount of trace metal element Co and metal ion chelating agent, therefore, the invention is not only convenient to be manipulated with high efficiency and but also low in cost which leads the invention to be extensively applicable in engineering practice.

Description

technical field [0001] A method for improving biogas production by anaerobic fermentation of organic waste water, especially chemical waste water, involving a method to promote organic matter in organic waste water by adding cobalt, a trace metal element necessary for methanogens, and a metal ion chelating agent in an anaerobic reactor. The invention relates to a new method for maximum conversion into methane, which belongs to the technical field of waste water biological treatment. Background technique [0002] Methane (methane) is recognized as a clean fuel in the world today, and it is also a high-quality chemical raw material. Today, with the increasingly serious environmental pollution and the shortage of fossil energy, the use of anaerobic biological method to produce methane has the dual functions of degrading waste and producing energy, and has attracted more and more attention. [0003] In the anaerobic biological treatment system, methanogens are one of the most c...

Claims

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Application Information

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IPC IPC(8): C12P5/02C02F11/04
CPCY02E50/343Y02E50/30
Inventor 陈坚李秀芬赵阳堵国成
Owner JIANGNAN UNIV
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