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Sewage denitrification and phosphorous removal system

A technology for nitrogen and phosphorus removal and sewage, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems such as the reduction of total nitrogen and total phosphorus content, and the difficulty of sewage treatment to meet standards , to increase the nitrification rate, solve the difficulty of reaching the standards for total nitrogen and total phosphorus in the effluent, and reduce the use of fillers

Active Publication Date: 2017-05-31
深圳市万木水务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the problems existing in the prior art, the present invention provides a novel deep denitrification and dephosphorization treatment process for sewage with the function of denitrification and dephosphorization. Effectively solve the problem of difficult sewage treatment standards

Method used

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  • Sewage denitrification and phosphorous removal system
  • Sewage denitrification and phosphorous removal system

Examples

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Embodiment example 1

[0048] Such as figure 2 The sewage nitrogen and phosphorus removal treatment system shown in A is composed of anaerobic tank, mud-water separation unit, anoxic tank, aerobic tank, and secondary sedimentation tank connected in sequence, and a nitrification unit is also installed. Influent flow Q=10L / h, the anaerobic tank is equipped with the inlet of raw water and return sludge 1 of the secondary settling tank, the nitrification unit only includes the nitrification tank, and the supernatant separated by the mud-water separation unit enters with the return sludge 2 of the secondary settling tank Nitrification tank, the mixed solution from the nitrification tank and the sludge from the mud-water separation unit enter the anoxic tank, the mixed solution from the anoxic tank enters the aerobic tank, and the mixed solution from the aerobic tank enters the secondary settling tank, and the secondary settling tank is set There is a water outlet, part of the sludge from the secondary s...

Embodiment example 2

[0052] Such as figure 2 The sewage nitrogen and phosphorus removal treatment system shown in B is composed of anaerobic tank, mud-water separation unit, anoxic tank, aerobic tank, and secondary sedimentation tank connected in sequence, and a nitrification unit is also installed. Influent flow Q=10L / h, the anaerobic tank is provided with the inlet of raw water and secondary sedimentation tank return sludge 1, the nitrification unit includes mixing tank and nitrification tank, the supernatant separated by the mud-water separation unit and the secondary sedimentation tank return sludge 2 Enter the mixing tank, the mixed solution flowing out of the mixing tank enters the nitrification tank, the mixed solution flowing out of the nitrification tank and the sludge flowing out of the mud-water separation unit enter the anoxic tank, the mixed solution flowing out of the anoxic tank enters the aerobic tank, and the aerobic tank flows out The mixed solution enters the secondary settling...

Embodiment example 3

[0057] Such as image 3 The sewage denitrification and phosphorus removal treatment system shown is composed of anaerobic tank, mud-water separation unit, anoxic tank, aerobic tank, and secondary sedimentation tank connected in sequence, and a nitrification unit is also provided. Influent flow Q=10L / h, the anaerobic tank is provided with the inlet of raw water and secondary sedimentation tank return sludge 1, the nitrification unit includes mixing tank and nitrification tank, the supernatant separated by the mud-water separation unit and the secondary sedimentation tank return sludge 2 Enter the mixing tank, the mixed solution flowing out of the mixing tank enters the nitrification tank, the mixed solution flowing out of the nitrification tank and the sludge flowing out of the mud-water separation unit enter the anoxic tank, the mixed solution flowing out of the anoxic tank enters the aerobic tank, and the aerobic tank flows out The mixed solution enters the secondary settling...

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Abstract

The invention provides a sewage denitrification and phosphorous removal system. The sewage denitrification and phosphorous removal system comprises an anaerobic tank, a mud-water separation unit, a nitrification unit, an oxygen-poor tank, an aerobic tank and a secondary sedimentation tank, wherein raw water and reflowing sludge 1 of the secondary sedimentation tank enter the anaerobic tank; a mixed solution of the anaerobic tank enters the mud-water separation unit; supernatant of the mud-water separation unit and reflowing sludge 2 of the secondary sedimentation tank enter the nitrification unit; a mixed solution of the nitrification unit and sludge of the mud-water separation unit enter the oxygen-poor tank; a mixed solution in the oxygen-poor tank sequentially enters the aerobic tank and the secondary sedimentation tank. The sewage denitrification and phosphorous removal system provided by the invention can realize deep denitrification and phosphorous removal of municipal wastewater treatment and is applicable to newly built sewage plants, and modification of built sewage treatment plants is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to the nitrogen and phosphorus removal treatment of sewage. [0002] technical background [0003] The efficient removal of nitrogen and phosphorus has always been the focus and difficulty of urban sewage treatment. If the nitrogen and phosphorus in the tail water do not meet the standards, it will easily cause serious water pollution problems such as eutrophication of the water body. The "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) promulgated in 2002 put forward higher discharge requirements for sewage treatment, the specific standard is NH 4 + -N≤5mg / L, TN≤15mg / L, TP≤0.5mg / L (Class A standard). Some local governments have formulated more stringent discharge standards, such as Beijing's Comprehensive Water Pollution Discharge Standard (D11 / 307-2013). Therefore, both the construction of new sewage plants and the upgrading o...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/302
Inventor 李继吕小梅张东方
Owner 深圳市万木水务有限公司
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