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Authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device

A technology of chemical phosphorus removal and biological nitrogen removal, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of high chemical cost and large consumption, and solve the problem of carbon source Insufficient, small footprint, and the effect of reducing the dosage of external medicine

Inactive Publication Date: 2014-11-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found in practice that high iron salt phosphorus removal technology also faces disadvantages such as high cost of chemicals and large consumption

Method used

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  • Authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device
  • Authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device

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Embodiment Construction

[0016] like figure 1 , 2 As shown, the self-generated high-iron chemical phosphorus removal-anaerobic iron oxidation biological nitrogen removal integrated device is sequentially equipped with chemical flocculation and sedimentation zone I, ferrous salt supplement zone II, denitrification and phosphorus removal zone III and three-phase separation zone IV; The chemical flocculation sedimentation zone I is provided with a solid-liquid separation dephosphorization zone 2 and a slow flocculation dephosphorization zone 5 from bottom to top, and a chemical sludge discharge port 1 is provided at the bottom center of the solid-liquid separation dephosphorization zone 2 for solid-liquid separation The dephosphorization zone 2 and the slow flocculation dephosphorization zone 5 are directly connected, and the upper center of the slow flocculation dephosphorization zone 5 is provided with a bell mouth 4; the top of the chemical flocculation sedimentation zone I is connected to the ferrous...

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Abstract

The invention discloses an authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device. The device is provided with a chemical flocculation settling area, a ferrous salt supplement area, a nitrogen and phosphorus removal area and a three-phase separation area from bottom to top, wherein the chemical flocculation settling area is provided with a solid-liquid separation phosphorus removal area and a slowly flocculating phosphorus removal area, the ferrous salt supplement area is provided with a zero-valent iron filling area, the nitrogen and phosphorus removal area is provided with a rapidly settling phosphorus removal area and a ferrous oxidization biological nitrogen removal area from inside to outside, the three-phase separation area is provided with a gas release area and a settling area, and the settling area is provided with a biological sludge discharge port, a reflux port, an overflow weir and a water outlet. According to the device, the matrix of the phosphorus removal process and the nitrogen removal process can be recycled; by using biological denitrificatio and authigenic ferric salt chemical phosphorus removal agent, the cost for removing phosphorus is lowered; zero-valent iron such as cheap iron residue / scrap iron is dissolved by acid ferric salt phosphorous removal reaction solution so as to provide ferrous salt matrix for biological denitrification, and the purpose of processing waste with waste is achieved; by using autotroph for denitrification, the problem of insufficient carbon source in biological denitrification of wastewater is effectively solved.

Description

technical field [0001] The invention relates to a nitrogen and phosphorus removal device, in particular to an authigenic high-iron chemical phosphorus removal-anaerobic iron oxidation biological nitrogen removal integrated device. Background technique [0002] Eutrophication of water body is an important environmental problem facing our country. According to my country's "National Environmental Statistical Bulletin" and "China Environmental Status Bulletin", in 2012, among the 62 nationally controlled key lakes (reservoirs), eutrophic water bodies accounted for 86.7%, and the main pollution indicator causing water eutrophication is total nitrogen. and total phosphorus. Therefore, nitrogen and phosphorus removal from wastewater has become an important way to prevent and control water eutrophication. [0003] Wastewater biological treatment technology is a commonly used wastewater treatment technology. After biological treatment (secondary treatment), the COD concentration b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52C02F1/72
Inventor 郑平张萌王茹沈小晶张宗和詹恩超张吉强王振希
Owner ZHEJIANG UNIV
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