Method and device for processing high-concentration undegradable waste water by using jet flow membrane bioreactor (MBR)

A high-concentration, refractory technology, applied in the direction of anaerobic digestion, sustainable biological treatment, chemical instruments and methods, etc., can solve the problems that restrict the large-scale and wide application of MBR, the difficulty of cross-flow velocity on the surface, and serious membrane fouling, etc. Achieve excellent and stable effluent quality, accelerate sludge granulation, and improve water flow conditions

Inactive Publication Date: 2011-02-02
GO HIGHER ENVIRONMENT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the position of the membrane module, MBR can be divided into separate type (also known as external type) and submerged type (also known as built-in type, integrated type). It is difficult to increase the speed, which leads to serious membrane fouling and high energy consumption, which restricts the large-scale and extensive application of MBR in wastewater treatment.

Method used

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  • Method and device for processing high-concentration undegradable waste water by using jet flow membrane bioreactor (MBR)
  • Method and device for processing high-concentration undegradable waste water by using jet flow membrane bioreactor (MBR)

Examples

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example 1

[0028] Example 1: The source of sewage is wastewater from a coking plant, and the water quality condition is: COD Cr The content is 3000~5000mg / L, the BOD content is 700~900mg / L, the total nitrogen is 220mg / L, and the SS is 600mg / L. After compound anaerobic bed-intermediate pool-jet flow MBR-small pore ultrafiltration membrane system-multi-effect oxidation system, the intermediate pool uses O 3 As an oxidant, the ultrafiltration membrane used in the small pore ultrafiltration membrane system has a molecular weight cut-off of 1000 Daltons. Final effluent COD Cr 50mg / L, the total nitrogen concentration is less than 10mg / L, and the chromaticity is less than 15, meeting the industry's first-class discharge standard A;

example 2

[0029] Example 2: The source of sewage is wastewater from a dye chemical factory, and the water quality condition is: CODCr Content 10000~20000mg / L, BOD content 1800~5000mg / L, SS 1200mg / L. After compound anaerobic bed-intermediate pool-jet flow MBR-small pore ultrafiltration membrane system-multiple oxidation system, the intermediate pool uses H 2 o 2 / O 3 As an oxidant, the ultrafiltration membrane used in the small-pore ultrafiltration membrane system has a molecular weight cut-off of 30,000 Daltons. Final effluent COD Cr It is 50mg / L, and the chromaticity is less than 15, reaching the first-class A standard of the industry.

example 3

[0030] Example 3: The sewage water quality condition is: COD Cr The content is 10000~15000mg / L, the BOD content is 1800~3000mg / L, and the SS is 1200mg / L. After compound anaerobic bed-intermediate pool-jet flow MBR-small pore ultrafiltration membrane system-multi-effect oxidation system, the intermediate pool uses H 2 o 2 / Iron carbon is used as an oxidant, and the molecular weight cut-off of the ultrafiltration membrane used in the small pore ultrafiltration membrane system is 5000 Daltons. Final effluent COD Cr It is 50mg / L, and the chromaticity is less than 15, reaching the first-class A standard of the industry.

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Abstract

The invention discloses a method and a device for processing high-concentration undegradable waste water by using a jet flow membrane bioreactor (MBR). The main process is performed in a hybrid anaerobic reactor, an intermittent tank, the jet flow MBR, a small-aperture ultrafiltration membrane system and a multiple-effect oxidation system. The device comprises a regulating tank, the hybrid anaerobic reactor, the intermittent tank, the jet flow MBR, the small-aperture ultrafiltration membrane system and the multiple-effect oxidation system in turn. The method and the device have the advantages that: the oxidation effects of the hybrid anaerobic reactor and the intermittent tank fully improve the biochemical property of the waste water; organics are effectively removed from the jet flow MBR and the membrane pollution is effectively controlled; operation energy consumption is low and noises are low; the cut-off molecular weight of a small-aperture ultrafiltration membrane in the small-aperture ultrafiltration membrane system is 1,000 to 30,000 dalton, so that the chemical oxygen demand (COD) and the chroma of the micromolecular organics can be further removed; and the effluent of the whole system has a high quality and reaches the first-grade A discharge standards of the industry, and the COD of the effluent is less than or equal to 50mg / L, so that the high-concentration undegredable waste water is treated effectively and discharged after meeting standards.

Description

technical field [0001] The invention relates to a method and a device for treating high-concentration refractory wastewater, in particular to a method and a device for treating high-concentration refractory wastewater by jet flow MBR. Background technique [0002] High-concentration refractory organic wastewater is mainly wastewater produced in the production processes of coking plants, coal chemical industry, dyestuffs, pesticides, pharmaceuticals, and chemicals. Wastewater pollutants have high concentration, high toxicity, and high salt content, which is difficult to biodegrade. Toxic and harmful pollutants in wastewater enter the water body and remain for a long time, and accumulate in human and animal bodies through the food chain, which has strong toxicity, carcinogenic and mutagenic effects. With the rapid development of industry and agriculture, people have synthesized more and more organic substances, among which refractory organic substances account for a large prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/44C02F9/14C02F1/72C02F3/28C02F1/78
CPCY02W10/10
Inventor 陈福泰范正虹郝福锦刘海宁
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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