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Method for promoting anaerobic methanation of organic acid by using nano graphene

A nano-graphene and anaerobic methane technology is applied in the field of anaerobic methanation to achieve the effects of improving the removal rate, promoting the anaerobic methane production process, and promoting aggregation

Active Publication Date: 2021-11-16
HAINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no use of nano-graphene to promote anaerobic methanation of organic acids

Method used

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  • Method for promoting anaerobic methanation of organic acid by using nano graphene
  • Method for promoting anaerobic methanation of organic acid by using nano graphene
  • Method for promoting anaerobic methanation of organic acid by using nano graphene

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Embodiment Construction

[0027] In order to better understand the technical content of the present invention, specific examples are provided below to further illustrate the present invention.

[0028] The experimental methods used in the examples of the present invention are conventional methods unless otherwise specified.

[0029] The materials and reagents used in the examples of the present invention can be obtained from commercial sources unless otherwise specified.

[0030] 1. Experimental materials and methods

[0031] 1.1 Experimental materials and instruments

[0032] 1.1.1 Inoculation sludge

[0033] The sludge used in this experiment was taken from anaerobic granular sludge from citrate treatment in Shandong. Sludge was domesticated with sodium acetate and n-valeric acid as carbon source, potassium dihydrogen phosphate as phosphorus source, and ammonium chloride as nitrogen source, and nano-graphene (nano-GE) was added for synchronous domestication; the concentration of n-valeric acid was...

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Abstract

The invention provides a method for promoting anaerobic methanation of organic acid by using nano graphene. The method comprises the following steps that: nano graphene is added in the anaerobic methanation reaction of the organic acid, the addition amount of the nano graphene is 0.1-2.4 g / L, the preferable addition amount is 1.0-2.0 g / L, the more preferable addition amount is 1.0-1.5 g / L, and the most preferable addition amount is 1.5 g / L. According to the method, a certain amount of nano graphene is added in the anaerobic methanation reaction of the organic acid, so that the anaerobic methanation of the organic acid is promoted, the removal rate of COD-Cr is effectively increased, the yield of methane is increased, the lag time of the reaction is shortened, and the particle form of sludge is effectively maintained.

Description

technical field [0001] The invention relates to the field of anaerobic methanation, in particular to a method for promoting anaerobic methanation of organic acids by using nanometer graphene. Background technique [0002] The research and development of anaerobic digestion technology has a history of more than 100 years. It uses anaerobic or facultative anaerobic microorganisms to decompose organic matter in an anaerobic environment and produce hydrogen, methane and other gases. It is a complex biochemical process. Compared with aerobic biological treatment, anaerobic digestion has the advantages of high efficiency, low consumption, less residual sludge, and recyclable methane. In continuous exploration and innovation, anaerobic digestion technology is constantly innovating and developing, such as upflow Anaerobic sludge bed (UASB), anaerobic internal circulation (IC) reactor, etc. Anaerobic digestion is widely used in wastewater treatment, sludge treatment, livestock manur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04
CPCC12P5/023C02F11/04Y02E50/30
Inventor 王德欣张姿颖
Owner HAINAN UNIVERSITY