Method for improving methane yield by organic waste water anaerobic fermentation

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...

AI Technical Summary

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 the growth of methanogens, but also affects the activity of bacteria, and affects the operation effect and stability of the entire anaerobic reactor

[0005] However, the cobalt in the anaerobic reactor is easy to exist in the form of carbonate, phosphate and sulfide precipitation, and the cobalt in the precipitated form cannot be utilized by methanogens, so a certain amount of biological The available trace metal element cobalt is very important