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Low carbon nitrogen ratio micro contaminated water nitrogen removal method

A technology with slightly polluted water and low carbon-to-nitrogen ratio, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low proliferation rate of autotrophic microorganisms and long hydraulic retention time HRT , sulfur consumption and other problems, to achieve the effect of reducing excessive sulfate ion content, short breeding time, and strong anti-interference ability

Inactive Publication Date: 2013-08-07
HUBEI UNIV
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Problems solved by technology

[0005] However, at present, this technology consumes too much raw material sulfur, which causes serious secondary pollution of the system (high sulfate ion in the effluent). In addition, due to the low proliferation rate of autotrophic microorganisms, the reaction starts slowly, and the hydraulic retention time HRT is too long. No engineering value for practical application

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  • Low carbon nitrogen ratio micro contaminated water nitrogen removal method
  • Low carbon nitrogen ratio micro contaminated water nitrogen removal method
  • Low carbon nitrogen ratio micro contaminated water nitrogen removal method

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Embodiment Construction

[0021] Concrete steps of the present invention are as follows:

[0022] 1) Place composite denitrification filler in layers in the upward flow reactor (see attached picture), the composite denitrification filler is sulfur / limestone / forest waste, the volume ratio is 1:0.2~0.5:0.5~2, specifically sulfur The volume ratio of limestone / wood residue is 1:0.2:0.5, 1:0.2:1, 1:0.2:2, 1:0.5:0.5, etc.

[0023] The sulfur is melted and molded, and processed into a small cylinder with a bottom diameter of about 1-1.5 cm and a height of about 1-1.5 cm. The limestone is crushed into granules with a volume roughly equivalent to that of sulfur granules. Forest waste is discarded in forestry production. shavings, plant residues, etc.

[0024] 2) Start the first stage, inoculate the filler with anaerobic sludge equal to the volume of the filler, set the start-up HRT to 8 h, pump the raw water into the upward flow reactor, and continuously feed Thiobacillus denitrification The medium was used t...

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Abstract

The invention relates to a low carbon nitrogen ratio micro contaminated water nitrogen removal method. A sulphur / limestone / forest tree waste composite nitrogen removal filling material is layered and placed in a up flow reactor, and anaerobic sludge is inoculated into the filling material; HRT is set and started for 8 hours, and raw water is pumped, and a thiobacillus denitrificans medium is continuously let in for dynamic culture domestication of sludge, until stable operation; after ten days of operation, Na2S2O3.5H2O in the thiobacillus denitrificans medium is reduced to a half, and domestication is continued until a biomembrane grows mature again, and then Na2S2O3.5H2O in the thiobacillus denitrificans medium is reduced to zero, thereby microorganisms can utilize the sulphur in the filling material as sulfur source for growth and breeding; after ten days of system operation, a stable biomembrane is finally formed, and a nitrogen removal treatment of normal micro pollution water is carried out. A forest tree waste is added in the filling material according to the invention, and heterotrophic denitrifying bacterium are increased, and a mixed nutrition type nitrogen removal system is formed, and the invention has the advantages of short domestication time, good anti-interference capability, good nitrogen removal effect without secondary pollution.

Description

technical field [0001] The invention relates to a method for denitrification of slightly polluted water with a low carbon-to-nitrogen ratio. Background technique [0002] A large number of surface water bodies in my country have become the recipients of urban domestic sewage, rainwater, rural non-point source pollution and garbage, resulting in varying degrees of pollution and even eutrophication. Mosquitoes and so on. Therefore, how to improve the external image of water body, improve water quality and restore its ecological function is an urgent problem to be solved in the construction of ecological environment in our country. [0003] Studies have shown that nitrogen is one of the main factors leading to eutrophication of water bodies. In the treatment of eutrophication problems in water bodies, reducing the nitrogen content in water has become the top priority. The traditional denitrification technology is biological nitrification and denitrification, but the denitrific...

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Application Information

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IPC IPC(8): C02F3/34C02F3/28
Inventor 胡细全
Owner HUBEI UNIV
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