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Method and device for efficient biochemical treatment of refractory wastewater

A biochemical treatment device and refractory technology, applied in the field of water treatment, can solve problems such as poor effect, difficult treatment, and substandard discharge, and achieve the effects of wide application range, good treatment effect and short residence time

Inactive Publication Date: 2014-04-02
GO HIGHER ENVIRONMENT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a method and device for high-efficiency biochemical treatment of refractory wastewater, which solves the problems of difficult treatment, poor effect and substandard discharge in the prior art

Method used

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  • Method and device for efficient biochemical treatment of refractory wastewater
  • Method and device for efficient biochemical treatment of refractory wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A papermaking wastewater, raw water COD Cr 1000mg / L~1500mg / L, BOD 5 It is 100mg / L~200mg / L. It is oxidized by the micro-electrolytic oxidation tank first, and then biochemically treated by the bioreactor. After being treated by the Fenton oxidation tank, the wastewater COD Cr Reduced to 300mg / L~600mg / L, BOD 5 reduced to 100mg / L~150mg / L; after being treated by MBR pool, the wastewater COD Cr Reduced to 50mg / L~80mg / L, reaching the emission standard.

[0062] The membrane module set in the MBR pool is an anti-fouling flat membrane module, and the membrane flux is 10L / m 2 h; Micro-electrolytic oxidation pool can be replaced by one or more of anaerobic acidification pool or hydrolytic acidification pool; Fenton oxidation pool can be replaced by ozone oxidation pool, chemical oxidation pool, electro-oxidation pool or photocatalytic oxidation pool one or more of .

Embodiment 2

[0064] A printing and dyeing wastewater, raw water COD Cr 5000mg / L~7000mg / L, BOD 5 300mg / L~500mg / L; first undergo oxidation treatment in anaerobic acidification tank, then biochemical treatment in bioreactor; then after treatment in ozone oxidation tank, the wastewater COD Cr Reduced to 400mg / L~600mg / L, BOD 5 reduced to 100mg / L~200mg / L; after being treated by the MBR pool, the wastewater COD Cr Reduced to 70mg / L ~ 80mg / L, reaching the emission standard.

[0065] The membrane module set in the MBR pool is an anti-fouling flat membrane module, and the membrane flux is 30L / m 2 h; the anaerobic oxidation pool can be replaced by one or more of micro-electrolytic oxidation pools or hydrolytic acidification pools; the ozone oxidation pool can be replaced by chemical oxidation pools, Fenton oxidation pools, electro-oxidation pools or photocatalytic oxidation pools one or more of .

Embodiment 3

[0067] A coking wastewater, raw water COD Cr 5000mg / L~7000mg / L, BOD 5 300mg / L~500mg / L; first undergo oxidation treatment in anaerobic acidification tank, then biochemical treatment in bioreactor; then after treatment in ozone oxidation tank, the wastewater COD Cr Reduced to 400mg / L~600mg / L, BOD 5 reduced to 100mg / L~200mg / L; after being treated by the MBR pool, the wastewater COD Cr Reduced to 60mg / L~70mg / L, reaching the emission standard.

[0068] The membrane module set in the MBR pool is an anti-pollution flat membrane module, and the membrane flux is 15L / m 2 h; the anaerobic oxidation pool can be replaced by one or more of micro-electrolytic oxidation pools or hydrolytic acidification pools; the ozone oxidation pool can be replaced by chemical oxidation pools, Fenton oxidation pools, electro-oxidation pools or photocatalytic oxidation pools one or more of .

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Abstract

The invention discloses a method and a device for efficient biochemical treatment of refractory wastewater, and is used for solving problems that existing refractory wastewater treatment difficulty is great, effect is poor, and treated wastewater does not reach emission standards. The device comprises a regulating reservoir, a gas-floating tank, a pre-degrading tank, an intermediate water tank, a biological reactor, an advanced oxidizing tank and an MBR (Membrane Bioreactor) tank, wherein the regulating reservoir is used for regulating inlet water; the gas-floating tank is used for removing organic suspended substances in the wastewater; the pre-degrading tank is used for degrading part of biological refractory organic substances; the intermediate water tank is used for regulating inlet water of the biological reactor; the biological reactor is used for primary biological degradation; the advanced oxidizing tank is used for oxidizing un-degraded substances; the MBR tank is used for re-biological degradation; a membrane assembly is arranged in the MBR tank; the regulating reservoir, the gas-floating tank, the pre-degrading tank, the intermediate water tank, the biological reactor, the advanced oxidizing tank and the MBR tank are connected in sequence. The device and the method disclosed by the invention are adopted to lower degradation difficulty of refractory wastewater, and are high in degradation efficiency; refractory pollutants in the degraded wastewater are greatly reduced, the degraded wastewater is low in turbidity, and emission standards can be achieved.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method and device for treating refractory wastewater. Background technique [0002] Refractory wastewater refers to wastewater that is difficult to be decomposed by microorganisms, the decomposition speed is slow, and the decomposition is not complete. It mainly comes from industrial wastewater such as coking wastewater, pharmaceutical wastewater, petrochemical / oil wastewater, textile / printing and dyeing wastewater, chemical wastewater, and paint wastewater. . This type of wastewater includes toxic and refractory organic pollutants such as polycyclic aromatic hydrocarbons, halogenated hydrocarbons, heterocyclic compounds, organic phenolic compounds, organophosphorus pesticides, surfactants, and organic dyes. The chemical oxygen consumption is high, and general microorganisms have almost no degradation effect on it. With the development of synthetic technology, the output of ref...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 陈福泰
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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