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Method of advanced treatment of high concentration phosphorus sewage and recycling of phosphorus

A technology of advanced treatment and phosphorus recovery, which is applied in the directions of water/sewage multi-stage treatment, light water/sewage treatment, water/sludge/sewage treatment, etc. Large area and other issues

Active Publication Date: 2012-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the following problems in the current main technology of sludge removal and phosphorus removal: 1. The amount of sludge discharge is large, and the disposal of remaining sludge is difficult
[0014] Overcome the shortcomings of the existing conventional biochemical treatment process and membrane bioreactor process that the sludge disposal is difficult and occupies a large area through sludge removal and phosphorus removal

Method used

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  • Method of advanced treatment of high concentration phosphorus sewage and recycling of phosphorus
  • Method of advanced treatment of high concentration phosphorus sewage and recycling of phosphorus
  • Method of advanced treatment of high concentration phosphorus sewage and recycling of phosphorus

Examples

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Embodiment 1

[0033] In this embodiment, the sewage discharged from a certain chemical factory in Nanjing, which is inferior to Class V, is subjected to advanced treatment to reach the level of surface water Class III (TN < 15 mg / L), and the daily treatment capacity is 10 tons.

[0034] The micro-polluted water treatment steps of this embodiment are as follows:

[0035] a) Precipitation

[0036] The sewage collected by the sewage pipeline is filtered through the coarse grid to remove solid impurities and then enters the sand settling sump.

[0037] The water pump pumps up the sewage from the sand settling tank, filters a small amount of mud and sand through a fine grid, and then enters the adjustment tank. Through the circulating water pump and the connected jet device, the perforated aeration pipe installed at the bottom of the tank is used to aerate and stir the water body to maintain The water quality is relatively stable.

[0038] b) Convert phosphorus in sewage into phosphine and rem...

Embodiment 2

[0066] In this embodiment, the sewage discharged from a certain chemical factory in Nanjing, which is inferior to Class V, is subjected to advanced treatment to reach the level of surface water Class III (TN < 15 mg / L), and the daily treatment capacity is 10 tons.

[0067] The micro-polluted water treatment steps of this embodiment are as follows:

[0068] a) Precipitation

[0069] The sewage collected by the sewage pipeline is filtered through the coarse grid to remove solid impurities and then enters the sand settling sump.

[0070] The water pump pumps up the sewage from the sand settling tank, filters a small amount of mud and sand through a fine grid, and then enters the adjustment tank. Through the circulating water pump and the connected jet device, the perforated aeration pipe installed at the bottom of the tank is used to aerate and stir the water body to maintain The water quality is relatively stable.

[0071] b) Convert phosphorus in sewage into phosphine and rem...

Embodiment 3

[0099] In this embodiment, the sewage discharged from a certain pesticide factory in Nanjing, which is inferior to Class V, is subjected to advanced treatment to reach the level of surface water Class III (TN < 15 mg / L), with a daily treatment capacity of 15 tons.

[0100] The micro-polluted water treatment steps of this embodiment are as follows:

[0101] a) Precipitation

[0102] The sewage collected by the sewage pipeline is filtered through the coarse grid to remove solid impurities and then enters the sand settling sump.

[0103] The water pump pumps up the sewage from the sand settling tank, filters a small amount of mud and sand through a fine grid, and then enters the adjustment tank. Through the circulating water pump and the connected jet device, the perforated aeration pipe installed at the bottom of the tank is used to aerate and stir the water body to maintain The water quality is relatively stable.

[0104] b) Convert phosphorus in sewage into phosphine and rem...

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Abstract

The invention discloses a method of advanced treatment of high concentration phosphorus sewage and recycling of phosphorus. The method takes sewage in chemical plants or insecticide factories and includes: a, preliminary precipitation; b, phosphorous removal through conversion of the phosphorous in the sewage into phosphine; c, inducing supernatant after treatment into a coagulating basin, adding a coagulant, nano micropowder absorbent and a flocculant into the coagulating basin to enable particles in the water to coagulate so as to obtain a mixed liquor, inducing the whole mixed liquor to a sedimentation basin for sedimentation, and performing solid-liquid separation to obtain supernatant; and d, performing nitrogen and ultraviolet combined disinfection and recycling of the purified water. According to the method, the phosphine stored in an air reservoir is converted, sludge after the sewage treatment is recycled completely, organic pollutants are removed, denitrification is achieved, and the technical gap of efficient conversion and usage of the phosphine at present is filled.

Description

technical field [0001] The invention relates to the field of sewage treatment and recovery, in particular to a method for advanced treatment of high-concentration phosphorus sewage and phosphorus recovery and utilization. Background technique [0002] Phosphorus is a limited resource that cannot be naturally regenerated on the earth. There is a contradiction between the increasing shortage of terrestrial phosphorus mineral resources and the excessive phosphorus content in the water environment, which leads to eutrophication of water bodies. Eutrophication of water body is one of the main environmental problems at present, which seriously restricts the sustainable development of society and economy. Phosphorus, as a nutrient factor, is one of the important factors that induce eutrophication in water bodies. The phosphorus in water mainly comes from domestic sewage, detergents and industrial wastewater. How to effectively remove phosphorus in wastewater has always been a hot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/32
Inventor 牛晓君
Owner SOUTH CHINA UNIV OF TECH
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