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Multi-point cyclic control anaerobic/anoxic parallel synchronous denitrification and dephosphorization method

A simultaneous nitrogen and phosphorus removal and cycle control technology, applied in anaerobic digestion treatment, chemical instruments and methods, aerobic and anaerobic process treatment, etc., can solve problems such as poor nitrogen and phosphorus removal effects, and achieve increased retention time, increase the quantity, and improve the effect of nitrogen and phosphorus removal

Inactive Publication Date: 2010-09-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of the contradiction between denitrification and dephosphorization existing in the existing sewage treatment method, and the effect of denitrification and dephosphorization is poor, and provides a multi-point cycle control anaerobic / anoxic parallel synchronous denitrification and dephosphorization Phosphorus method

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  • Multi-point cyclic control anaerobic/anoxic parallel synchronous denitrification and dephosphorization method

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specific Embodiment approach 1

[0019] Specific implementation mode 1: The multi-point circulation control anaerobic / anoxic parallel synchronous denitrification and phosphorus removal method in this embodiment is realized by the following methods: 1. The sewage to be treated enters the preliminary sedimentation tank and stands still for 0.5-1.0 hours, and the preliminary sedimentation tank effluent 30% to 70% (volume) of the sedimentation tank flows into the anaerobic zone, and the rest of the effluent from the preliminary sedimentation tank flows into the anoxic zone; 2. The effluent from the anaerobic zone and the anoxic zone are mixed and flow into the aerobic zone, and the hydraulic retention time of the aerobic zone is 4.0~6.0 hours; 3. The effluent from the aerobic zone flows into the secondary settling tank and stands still for 2.0~3.0 hours, and then the water can be discharged; the sludge in the secondary settling tank is discharged and discarded, and the rest are respectively returned to the anaerobi...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment differs from Embodiment 1 in that: in Step 1, the sewage to be treated enters the preliminary sedimentation tank and stands still for 0.7-0.9 hours. Other steps and parameters are the same as those in the first embodiment.

[0026] Embodiment 2: This embodiment is different from Embodiment 1 in that: in step 1, the sewage to be treated enters the preliminary sedimentation tank and stands still for 0.8 hours. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: This embodiment is different from Embodiment 1 in that: in step 1, the sewage to be treated enters the preliminary sedimentation tank and stands still for 0.9 hours. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention discloses a multi-point cyclic control anaerobic / anoxic parallel synchronous denitrification and dephosphorization method, and relates to a denitrification and dephosphorization method. The invention solves the existing problems of the mutual contradiction between denitrification and dephosphorization and the poor denitrification and dephosphorization effect in the traditional sewage treatment method. The method comprises the following steps of: 1. standing sewage to be treated in a preliminary sedimentation tank, and then respectively discharging the sewage into an anaerobic zone and an anoxic zone; 2. mixing the water discharged from the anaerobic zone and the anoxic zone, and leading the mixed water to flow into an aerobic zone; and 3. leading the water discharged from the aerobic zone to flow into a secondary sedimentation tank, standing, and discharging the water, wherein sludge in the secondary sedimentation tank, except the disused one by discharging, respectively flows back to the anaerobic zone and the aerobic zone, and nitrifying liquid in the aerobic zone flows back to the anoxic zone. The method solves the problem of the mutual contradiction between the denitrification and the dephosphorization, and achieves good denitrification and dephosphorization effect.

Description

technical field [0001] The invention relates to a method for removing nitrogen and phosphorus. Background technique [0002] At present, the urban sewage treatment mainly adopts the biological activated sludge method, and there are many kinds of treatment processes in the biological activated sludge method. 2 / O nitrogen and phosphorus removal process, oxidation ditch process, etc. A 2 / O process, as the simplest simultaneous nitrogen and phosphorus removal process in the system, is widely used in domestic and foreign urban sewage biological nitrogen and phosphorus removal sewage treatment plants due to its stable effect and wide adaptability. [0003] However, the process alternately operates three different environmental conditions of anaerobic, anoxic and aerobic, and different types of microbial flora such as phosphorus accumulating bacteria, denitrifying bacteria, and nitrifying bacteria coexist in the same sludge system, resulting in two major contradictions. , On t...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F3/28C02F3/30C02F3/02C02F1/58C02F3/34
CPCY02W10/10
Inventor 赫俊国韩宝平刘剑
Owner HARBIN INST OF TECH