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Low carbon nitrogen ratio domestic sewage double sludge partial nitrosation and denitrification ultra-deep nitrogen and phosphorus removal process

A technology of domestic sewage and low-carbon nitrogen ratio, applied in biological water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of unstable effluent quality and save organic carbon source effect

Active Publication Date: 2021-06-18
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low carbon nitrogen ratio domestic sewage double sludge partial nitrosation and denitrification ultra-deep denitrification and dephosphorization process to solve the problem of ultra-deep denitrification and dephosphorization and unstable effluent quality

Method used

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  • Low carbon nitrogen ratio domestic sewage double sludge partial nitrosation and denitrification ultra-deep nitrogen and phosphorus removal process
  • Low carbon nitrogen ratio domestic sewage double sludge partial nitrosation and denitrification ultra-deep nitrogen and phosphorus removal process

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Embodiment 1

[0040] Low carbon nitrogen ratio domestic sewage double sludge partial nitrosation and denitrification ultra-deep nitrogen and phosphorus removal process, the process includes the device part: sewage adjustment tank;

[0041] The pipeline at the outlet of the sewage regulating tank 1 is provided with an inlet pump 2, and the sewage regulating tank 1 is connected to the denitrification tank 4 through a pipeline. The connecting pipeline is provided with a supernatant liquid transfer pump 17 and a supernatant liquid transfer pump electromagnetic valve 18, the denitrification tank 4 is connected with the nitrification tank 22 through the pipeline, and the nitrification liquid transfer pump 21 is arranged on the pipeline at the outlet of the nitrification tank 22, and the nitrification The pool 22 is connected with the intermediate pool 19 through pipelines, and the pipeline at the water outlet of the intermediate pool 19 is provided with a nitrifying liquid return pump 20, and the ...

Embodiment 2

[0045] On the basis of embodiment 1, the denitrification tank 4 is provided with a decanter 6, and the denitrification tank 4 in the denitrification tank 6 is connected to the drain of the denitrification tank 4, and the drain of the denitrification tank 4 is connected to the denitrification tank 4 through a pipeline. The filler filter tank 28 is connected, and the pipeline connected to the denitrification tank 4 is provided with a backwash solenoid valve 25 and a backwash pump 26, and the filter tank drainage solenoid valve 27 is arranged on the connection pipeline at the top of the filler filter tank 28;

[0046] A filter solenoid valve 30 and a filter pump 31 are arranged on the pipeline connected to one side wall of the filler filter tank 28, and a sludge debris filter tank supernatant return pump 32, sludge filter tank 28 is provided on the pipeline connected to the other side wall The supernatant of the debris filter tank is returned to the solenoid valve 33, and the othe...

Embodiment 3

[0050] On the basis of Embodiment 1-2, the upper part of the sludge organic carbon source mixing tank 38 is round-shaped and the lower part is conical funnel-shaped;

[0051] The top of the denitrification tank 4 has a cover and is in a semi-sealed state, and the denitrification tank 4 is provided with an exhaust pipe connected to the atmosphere;

[0052] The denitrification tank 4, the nitrification tank 22, and the sludge organic carbon source mixing tank 38 are all equipped with a submersible mixer 5; it is convenient for the sludge organic carbon source mixing tank 38 to react and discharge exhaust in the denitrification tank 4.

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Abstract

The invention discloses a low-carbon-nitrogen ratio domestic sewage double sludge partial nitrosation and denitrification ultra-deep denitrification and phosphorus removal process, aiming at the high content of ammonia nitrogen and nitrate in the effluent of the traditional A2N process, poor system stability, low carbon and nitrogen ratio in domestic sewage, The traditional sewage treatment process has problems such as poor nitrogen and phosphorus removal effects. Based on the principle of double sludge denitrification process, using the end point control technology of nitrification reaction and denitrification reaction, through multiple nitrification and denitrification and controlling DO concentration, the sludge Carried ammonium nitrogen is converted into N through nitrosation and denitrification 2 The denitrification phosphorus absorption and aerobic phosphorus absorption are used to realize the ultra-deep absorption of phosphorus simultaneously during the denitrification process, and the additional organic carbon source is mixed with part of the activated sludge, and the anaerobic phosphorus release strengthens the absorption of the external carbon source. The denitrification phosphorus removal function removes suspended activated sludge debris in the denitrification effluent through the packing filter system, further improves the purification efficiency of phosphorus, nitrogen and CODcr, and finally achieves ultra-deep removal of nitrogen, phosphorus and CODcr.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a low-carbon-to-nitrogen ratio domestic sewage double sludge partial nitrosation and denitrification ultra-deep nitrogen and phosphorus removal process. Background technique [0002] At present, domestic sewage in many parts of my country is relatively low in carbon and nitrogen, and the current sewage treatment processes in my country: AB method, oxidation ditch method, A / O process, A2O process, SBR method, etc. are basically based on the removal of organic matter, nitrogen The contradictory problem of carbon source demand in the phosphorus removal process cannot be effectively solved at all, resulting in low nitrogen and phosphorus removal efficiency. In addition, according to the standards formulated by my country's "Pollutant Discharge Standards for Urban Sewage Treatment Plants" GB18918-2002, even if the discharge meets the standards, the water quality is only equiva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F3/302C02F3/308C02F9/00C02F2301/043
Inventor 张唯段昌群程立忠王海玉杨桂英陆秀妍
Owner YUNNAN UNIV