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Dyeing and finishing waste water recycling method

A technology for dyeing and finishing wastewater and wastewater, applied in the field of textile printing and dyeing, can solve the problem of low recycling rate of wastewater, and achieve the effect of reducing enterprise cost and improving water utilization rate.

Pending Publication Date: 2020-01-17
ZHEJIANG TONGHUI TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is a printing and dyeing wastewater reuse treatment method in the disclosed technology, it adds the MBR process on the basis of the traditional secondary biological treatment. Through the efficient interception of suspended matter and organic matter in the wastewater by the membrane, the quality of the treated water is greatly improved. Reverse osmosis treatment and reuse of wastewater is more reliable, but the recycling rate of wastewater in this method is low

Method used

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Embodiment Construction

[0009] The present invention will be further described below with regard to specific embodiment:

[0010] A dyeing and finishing wastewater recycling method, the wastewater is treated in stages, wherein, the first waste water is diverted to the reclaimed water reuse pool and the MBR filter pool after passing through the waste water tank, the filter tank, and the air flotation tank; After the settling tank and the biochemical tank, the flow is diverted. Part of the wastewater that meets the discharge indicators is directly discharged outside, part of the wastewater enters the discharge adjustment tank, and the other part of the wastewater enters the MBR filter tank after being treated by the air flotation tank and sand filter tank, and is filtered by the MBR filter tank The wastewater enters the reclaimed water reuse tank, among which, polyacrylamide is added to the wastewater of the filter tank and the primary sedimentation tank, and the separated wastewater after flocculation ...

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Abstract

The invention discloses a dyeing and finishing waste water recycling method. The waste water is subjected to segment treatment, wherein the first path of waste water is divided to a reclaimed water recycling pool and an MBR filtering pool after passing through a waste water pool, a filtering pool and an air floatation pool; and the second path of waste water is divided after passing through a primary settling pool and a biochemical pool, one part of waste water according with the discharging index is directly discharged outside, and one part of waste water enters an external discharge regulating pool. According to the dyeing and finishing waste water recycling method, the recycling rate is high and the utilization rate of water is increased.

Description

Technical field: [0001] The invention relates to the field of textile printing and dyeing, in particular to a method for recycling dyeing and finishing wastewater. Background technique: [0002] Printing and dyeing wastewater is one of the main industrial wastewater in my country. It has the characteristics of large water volume, high chroma, and complex composition, which causes serious pollution to the environment. Printing and dyeing wastewater has complex components and is one of the most difficult industrial wastewater to treat. [0003] At present, the unit operations of printing and dyeing wastewater treatment at home and abroad can be divided into physical treatment, chemical treatment and biological treatment according to the principle. Although there is a printing and dyeing wastewater reuse treatment method in the disclosed technology, it adds the MBR process on the basis of the traditional secondary biological treatment. Through the efficient interception of sus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/001C02F1/24C02F1/52C02F3/1268C02F9/00C02F2001/007C02F2103/30C02F2209/08C02F2209/14
Inventor 沈洪良丁月明孙金根沈王振王佳俊夏东明
Owner ZHEJIANG TONGHUI TEXTILE