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A method for improving the ammonification rate of chemical industry wastewater containing organic nitrogen

A chemical wastewater and rate technology, applied to chemical instruments and methods, water pollutants, anaerobic digestion treatment, etc., can solve the problems of difficult removal of ammonia nitrogen and low ammonification rate of chemical wastewater, and achieve simple methods, impact resistance, Manageable Effects

Active Publication Date: 2018-06-29
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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Problems solved by technology

[0007] Aiming at the problem that the ammoniation rate of chemical wastewater containing organic nitrogen is not high in the prior art, the present invention proposes a method for improving the ammoniation rate of chemical wastewater containing organic nitrogen
It increases the ammonification rate of organic nitrogen by anaerobic hydrolytic acidification by adding active catalysts, and solves the problem of difficult removal of ammonia nitrogen in chemical wastewater containing organic nitrogen

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  • A method for improving the ammonification rate of chemical industry wastewater containing organic nitrogen

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Embodiment 1

[0037] Such as figure 1 , a method for improving the ammonification rate of chemical industry wastewater containing organic nitrogen, the steps of which are:

[0038] A. Collect chemical wastewater through the wastewater collection tank; firstly collect chemical wastewater through the wastewater collection tank, and adjust the total nitrogen content of the wastewater in the collection tank to 100-150mg / L through laboratory tests, of which organic nitrogen content≤100mg / L, pH The control is 6-9, and the COD is 1500-2500mg / L.

[0039] B. The wastewater in the collection tank enters the anaerobic hydrolysis acidification tank; through the detection of the online sludge concentration meter, the sludge concentration in the anaerobic hydrolysis acidification tank is controlled to be 3500-4500mg / L, and the residence time of the wastewater is controlled according to the influent flow rate of 8-10h. On-line dissolved oxygen instrument detection, control dissolved oxygen DO≤0.2mg / L.

...

Embodiment 2

[0052] A printing and dyeing chemical enterprise in Yancheng Coastal Chemical Industry Park, Jiangsu Province, the sewage station before the transformation is as follows: collection pool→anaerobic hydrolysis acidification pool→anoxic / aerobic pool→secondary sedimentation tank→direct discharge, in order to improve the chemical industry containing organic nitrogen The ammonification rate of waste water proposes a method for improving the ammonification rate of industrial waste water containing organic nitrogen. Nitrogen content 75mg / L, pH=6, COD 1500mg / L;

[0053] In step B, the sludge concentration in the anaerobic hydrolysis acidification tank is 3500mg / L detected by the online sludge concentration meter, the influent flow rate is controlled so that the wastewater residence time is 8h, and the dissolved oxygen DO=0.2 is controlled by the online dissolved oxygen instrument detection mg / L;

[0054] In step C, the activated catalyst added in the anaerobic hydrolysis acidification...

Embodiment 3

[0059] For a pharmaceutical chemical company in Yancheng Coastal Chemical Industry Park, Jiangsu Province, the process before the renovation of the sewage station of the company is as follows: collection pool → anaerobic hydrolysis and acidification → anoxic / aerobic → secondary precipitation → direct discharge, in order to improve the ammonia content of chemical wastewater containing organic nitrogen A method for improving the ammonification rate of chemical industry wastewater containing organic nitrogen is proposed, the steps are the same as in Example 1, wherein, in step A, the water quality in the wastewater collection tank is as follows: total nitrogen 150mg / L, wherein organic nitrogen content 100mg / L, pH=9, COD is 2500mg / L;

[0060] In step B, the sludge concentration in the anaerobic hydrolysis acidification tank is controlled to be 4500mg / L through the detection of the online sludge concentration meter, the residence time of the wastewater is controlled according to th...

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Abstract

The invention discloses a method for improving the ammonification rate of organic nitrogen-containing chemical industry wastewater, belonging to the field of wastewater treatment methods. The steps are: A. Collect chemical wastewater through the wastewater collection tank; B. The wastewater in the collection tank enters the anaerobic hydrolysis acidification tank; C. Add an activated catalyst in the anaerobic hydrolysis acidification tank, and strengthen anaerobic hydrolysis by activating and catalyzing zero-valent iron The activity of ammonifying bacteria in the acidification pool strengthens the ammonification rate of organic nitrogen; D, the anaerobic hydrolysis acidification effluent undergoes subsequent anoxic and aerobic nitrification and denitrification of ammonia nitrogen; E, the aerobic pool nitrification liquid is refluxed to The anoxic tank and the sludge from the secondary sedimentation tank return to the anaerobic tank; F, the effluent ammonia nitrogen of the secondary sedimentation tank can be directly discharged, and the anaerobic hydrolysis acidification tank strengthened by the activated catalyst is compared with the traditional anaerobic hydrolysis acidification tank. Increased by 2 to 3 times.

Description

technical field [0001] The invention belongs to the field of wastewater treatment methods, and more specifically relates to a method for improving the ammoniation rate of organic nitrogen-containing industrial wastewater. Background technique [0002] In recent years, eutrophication and other phenomena have become increasingly serious, and how to remove nutrients nitrogen and phosphorus in sewage has attracted people's attention. Nitrogen exists in various forms such as molecular nitrogen, organic nitrogen, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, sulfur cyanide and cyanide in wastewater, and ammonia nitrogen is one of the most important forms of existence. In chemical wastewater, organic nitrogen is more common. An important prerequisite for how to remove ammonia nitrogen is how to quickly and effectively convert organic nitrogen into ammonia nitrogen. [0003] High-concentration ammonia nitrogen and organic nitrogen chemical wastewater has complex components ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/28C02F101/38
Inventor 卞为林戴建军杨道林李妙月
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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