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Method for promoting anaerobism and efficiently producing methane through denitrification at same time

A technology for denitrification and methane production, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as insufficient removal efficiency and long residence time, and reduce hydraulic retention time , Improve the reaction environment, reduce the effect of system adaptation time

Inactive Publication Date: 2018-01-05
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for promoting efficient anaerobic simultaneous denitrification and methane production in order to solve the shortcomings of single reactor anaerobic simultaneous denitrification and methane production in the prior art, including long residence time and removal efficiency

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  • Method for promoting anaerobism and efficiently producing methane through denitrification at same time
  • Method for promoting anaerobism and efficiently producing methane through denitrification at same time

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Embodiment 1

[0035] The method for promoting the efficient production of methane by anaerobic simultaneous denitrification comprises the following steps:

[0036] (1) The anaerobic granular sludge taken from the bottom of the well-run IC reactor in the wastewater treatment plant was used as the inoculation sludge, which was inoculated in the IC reactor. The total suspended solids (TSS) concentration of the sludge at the time of inoculation was 29.41g / L , the concentration of volatile suspended solids (VSS) is 20.35g / L, VSS / TSS=69.19%, and the inoculation amount of anaerobic granular sludge is 1L;

[0037] Using artificially prepared waste water with sodium propionate and sodium acetate (sodium propionate: sodium acetate = 1:1, molar ratio) as a mixed carbon source, the COD of the waste water is 3000 mg / L, and the waste water is made of NaNO 3 as nitrogen source;

[0038] By adding bicarbonate to ensure that the pH value of the wastewater is stable between 7.6±0.2; at the same time, trace ...

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Abstract

The invention discloses a method for promoting anaerobism and efficiently producing methane through denitrification at the same time. The method comprises the following steps: inoculating anaerobic granule sludge in an anaerobic reactor, guiding waste water taking sodium acetate and sodium propionate as a mixed carbon source, taking nitrate nitrogen in the waste water as a nitrogen source, controlling inflow COD (chemical oxygen demand) of the waste water to be consistent, gradually reducing the C / N specific value and operating the anaerobic reactor, so as to promote the waste water to be anaerobic and produce the methane through denitrification at the same time. According to the method, by controlling the type of the carbon source and the C / N specific value, a reaction environment of anaerobism and production of the methane through denitrification at the same time is improved, the anaerobism and the production of the methane through denitrification are achieved in the single reactor at the same time, the system adaptation time and the hydraulic retention time are shortened, the pollutant removal efficiency is high, the water quality of effluent is table, and the clean energy methane is produced.

Description

technical field [0001] The invention belongs to the field of environmental protection, relates to anaerobic biological treatment of organic waste water, and in particular relates to a method for promoting the anaerobic denitrification of waste water and simultaneously denitrifying methane production with high efficiency. Background technique [0002] Among the current wastewater biological treatment methods, the anaerobic biological treatment method has been widely used due to its advantages such as high organic load tolerance, low energy consumption, low operating costs, small and stable residual sludge, and convenient management. A good treatment effect has been achieved. [0003] In the anaerobic digestion process, it is divided into four stages: hydrolysis stage, acidification fermentation stage, acid production stage, and methane production stage. The hydrolysis stage is a biochemical process in which a compound is split into two or more simple compounds under the acti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/30
Inventor 万金泉姬保华王艳马邕文关泽宇闫志成
Owner SOUTH CHINA UNIV OF TECH
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