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AZNdenitrification phosphorus oliminating sewage treatment method and device

A sewage treatment method and denitrification phosphorus removal technology, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The problems of low treatment efficiency and long treatment time of eutrophic sewage can improve the stability and controllability.

Inactive Publication Date: 2007-11-21
BEIJING TANSI ENVIRONMENTAL PROTECTION TECHCO
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, almost all sewage treatment plants in my country are facing the same problem, that is, the removal effect of nitrogen removal and phosphorus removal cannot reach the best state at the same time. The main reasons are: 1. The ratio of sewage COD / TN is low, and the lack of carbon source The limiting factors of denitrification and phosphorus removal; 2. The three types of microorganisms, nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria, have different physiological habits and required environmental conditions, but most sewage plants use single sludge systems, and microorganisms Grow in a suspension mix, so there is no guarantee that they will both grow in their optimal environment at the same time
These two reasons eventually led to the removal of nitrogen and phosphorus as two contradictory aspects, making it difficult to control the concentration of ammonia nitrogen, TN and TP in the effluent and to remove them thoroughly. Long time, high energy consumption, and unstable denitrification and dephosphorization effect of sewage and low compliance rate

Method used

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  • AZNdenitrification phosphorus oliminating sewage treatment method and device
  • AZNdenitrification phosphorus oliminating sewage treatment method and device

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Embodiment Construction

[0026] Embodiment Referring to Fig. 1, the specific process of the present invention is: the raw water first enters the anaerobic pond, where the denitrifying phosphorus accumulating bacteria absorb a large amount of organic matter, store it in the body in the form of PHB, and release a large amount of phosphorus at the same time. After the muddy water is quickly separated by the middle sedimentation tank, the supernatant rich in ammonia nitrogen and phosphorus flows to the aerobic biofilm nitrification tank for nitrification reaction, and aerobic degradation of the remaining organic matter. The precipitated phosphorus-accumulating sludge goes beyond the biofilm nitrification tank and directly enters the anoxic tank. DPB uses the PHB in the body as the electron donor and the NO provided by the nitrification tank. 3 - As an electron acceptor, it completes denitrification and denitrification and excess phosphorus uptake. The design of the rear fast aeration tank is mainly used ...

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Abstract

A process for treating sewage by A2N denitrifying to remove P includes pumping sewage in anaerobic pool, discharging the muddy water in medium deposition pool, discharging the supernatant in aerobic biomembrane mitrifying pool and the sludge in anoxic pool, discharging the water from said nitrifying pool to anoxic pool, discharging water from anoxic pool to high-speed aerating pool for absorbing residual P, pumping water in final deposition pool, draining the treated water, and pumping part of sludge back to anaerobic pool.

Description

(1) Technical field [0001] The invention relates to a sewage treatment method and its device. (two), background technology [0002] Water eutrophication caused by excessive discharge of nitrogen and phosphorus is one of the environmental issues that the government and the public are most concerned about. The removal of nitrogen and phosphorus for the purpose of controlling water eutrophication has become the main goal of sewage treatment in various countries. At present, almost all sewage treatment plants in my country are facing the same problem, that is, the removal effect of nitrogen removal and phosphorus removal cannot reach the best state at the same time. The limiting factors of denitrification and phosphorus removal; 2. The three types of microorganisms, nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria, have different physiological habits and required environmental conditions, but most sewage plants use single sludge systems, and microor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/52
Inventor 彭永臻王亚宜王淑莹
Owner BEIJING TANSI ENVIRONMENTAL PROTECTION TECHCO
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