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Wastewater treatment technology for textile dyeing and finishing industry

A technology of industrial wastewater and treatment process, applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, easy damage, high power consumption, etc.

Inactive Publication Date: 2010-05-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this process is that the current ozone generator equipment is expensive, easy to damage, and consumes a lot of power
It is also difficult for general enterprises to build activated carbon regeneration facilities

Method used

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  • Wastewater treatment technology for textile dyeing and finishing industry
  • Wastewater treatment technology for textile dyeing and finishing industry
  • Wastewater treatment technology for textile dyeing and finishing industry

Examples

Experimental program
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Embodiment 1

[0051] In order to verify a kind of textile dyeing and finishing industrial wastewater treatment process of the present invention, the wastewater treatment station of Changshu Lianyi Printing and Dyeing Co., Ltd. uses the treatment process of the present invention and the recommended process in "Technical Specifications for Textile Dyeing and Finishing Industrial Wastewater Treatment Engineering" HJ471-2009 processed separately. The standard recommended process is adjustment - coagulation sedimentation - anaerobic hydrolysis - contact oxidation - secondary sedimentation. The effluent water quality of each step of the two treatment processes is shown in Table 1 below.

[0052] Traditional treatment process, final effluent COD cr It is 150mg / L. And the treatment process of the present invention finally effluent COD cr It is 39mg / L, reaching the DB32 / 1072-2007 emission standard.

[0053] Table 1, Changshu Lianyi Printing and Dyeing Co., Ltd. adopts standard recommended proces...

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Abstract

The invention discloses a wastewater treatment technology for the textile dyeing and finishing industry. The technological process is as follows: leading wastewater to enter into a regulating tank for pre-aeration regulation treatment, then using a water pump for lifting to a coagulative precipitation tank for coagulative precipitation, then leading the wastewater to enter into an anaerobic / anoxic hydrolysis tank, transforming organic matters which are difficult to degrade to the organic matters which are easy to bio-degrade under the common action of anaerobic and anoxic microorganisms, further leading the wastewater to enter into a sludge-film symbiotic system which comprises both suspended activated sludge and biofilm sludge, and has the advantages of large biomass, abundant biological phases and high removal efficiency, and finally carrying out secondary settling, thereby leading the outlet water CODcr to be 30-60mg / L. Compared with other advanced treatment technologies, the technology has the advantages of strong operability, low operation cost, stable operation and the like.

Description

technical field [0001] The invention relates to a textile dyeing and finishing industrial wastewater treatment process, which belongs to the technical field of environmental protection. Background technique [0002] The outbreak of blue-green algae incidents in the Taihu Lake Basin prompted the promulgation and implementation of the DB32 / 1072-2007 standard "Discharge Limits of Main Water Pollutants from Urban Sewage Treatment Plants and Key Industries in the Taihu Lake Area". In the new standard, it is clearly stipulated that the COD in the wastewater discharged from the textile dyeing and finishing industry in the Taihu Lake area cr Must not exceed 60mg / L. Prior to this, the textile dyeing and finishing industry implemented the first-level standard in the "Discharge Standard of Water Pollutants for Textile Dyeing and Finishing Industry" DB32 / 670-2004, or the "Integrated Wastewater Discharge Standard" GB8978-1996, that is, the waste water COD cr Shall not exceed 100mg / L. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/30C02F103/30
Inventor 毕东苏郭小品
Owner SHANGHAI INST OF TECH
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