Autotrophic-heterotrophic coupled deep denitrification device and method for sewage based on sulfur circulation

A technology of deep denitrification and sulfur recycling, applied in the adjustment method, separation method, water/sewage treatment and other directions of biological treatment, can solve the problems of high concentration, consumption of large organic carbon source, waste of chemical agents, etc., to improve the removal effect , The effect of reducing the process and reducing the dosage

Active Publication Date: 2020-07-17
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0002] According to the "China Environmental Statistical Bulletin", the discharge of ammonia nitrogen from industrial sources is 9.4% of the total discharge. The industrial sewage produced by nitrogen fertilizer, pharmaceuticals, coking enterprises and other industries has high concentration o

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  • Autotrophic-heterotrophic coupled deep denitrification device and method for sewage based on sulfur circulation

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Embodiment

[0040] Such as figure 1 As shown, the embodiment of the present invention provides a deep denitrification device for sewage based on the coupling of autotrophic and heterotrophic sulfur cycles, including an anaerobic methanogenesis reaction tank 1, a nitrification and denitrification reactor 2, and a sulfur recovery reaction tank connected in sequence 3;

[0041] The bottom of the anaerobic methanogenic reaction tank 1 is provided with a water distribution pipe 1.2, and the water distribution pipe 1.2 is connected with a duckbill valve 1.3, and the water inlet pipe 1.1 of the anaerobic methanogenic reaction tank 1 is communicated with the water distribution pipe 1.2;

[0042] The nitrification and denitrification reactor 2 is successively provided with anoxic denitrification zone 2.1, aerobic nitrification zone 2.2 and sedimentation tank 2.3, and the outlet pipe 1.8 of the anaerobic methanogenesis reaction tank 1 is connected with the anoxic denitrification zone 2.1 connect; ...

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Abstract

The invention provides an autotrophic-heterotrophic coupled deep denitrification device and method for sewage based on sulfur circulation, belonging to the technical field of sewage treatment. According to the invention, alkali liquor is adopted for a unit which generates hydrogen sulfide in the process of sewage treatment to absorb hydrogen sulfide; the absorbed sulfide is lifted to an anoxic tank, and nitrate nitrogen in the anoxic tank is removed through sulfur autotrophic denitrification; heterotrophic denitrification is conducted on residual organic matters of an anaerobic methanogenesisreaction in an anoxic tank, an anoxic unit carries out both sulfur autotrophic nitrogen removal and organic matter heterotrophic nitrogen removal, and removal of nitrate nitrogen is reinforced throughcoupling of sulfur autotrophic nitrogen removal and heterotrophic nitrogen removal; and a biogas desulfurization process system only absorbs hydrogen sulfide, and the absorbed sulfide is utilized inan anoxic system, so recovery and utilization of elemental sulfur are realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a device and method for deep deamination of sewage based on autotrophic and heterotrophic coupling of sulfur cycle. Background technique [0002] According to the "China Environmental Statistical Bulletin", the discharge of ammonia nitrogen from industrial sources is 9.4% of the total discharge. The industrial sewage produced by nitrogen fertilizer, pharmaceuticals, coking enterprises and other industries has high concentration of nitrogen pollutants and low C / N. The denitrification process needs to consume a large amount of organic carbon sources, resulting in high operating costs for sewage treatment, increasing the cost of sewage treatment plants and enterprises, and causing a huge waste of chemicals. [0003] However, general industrial wastewater contains a certain concentration of sulfur, and a large amount of hydrogen sulfide will be produced during anaerobic trea...

Claims

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Application Information

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IPC IPC(8): C02F3/30B01D53/18C02F101/16C02F101/30
CPCC02F3/302B01D53/18B01D53/1468C02F2001/007C02F2101/16C02F2203/006C02F2101/30B01D2252/10B01D53/52B01D2251/604B01D53/77B01D2258/05C02F9/00C02F3/305C02F3/2866C02F1/66C02F2209/06C02F2209/40C02F3/006C02F2209/08C02F2209/22C02F2209/14C02F2209/38C02F2209/02C02F2209/10C02F2209/006C02F1/00C02F3/1278C02F3/2893C02F2101/101C02F2201/005C02F2209/265C02F2301/046
Inventor 姚宏杨岸明田盛
Owner BEIJING JIAOTONG UNIV
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