Printing and dyeing waste water advanced treatment and recovery method

Abstract

The invention discloses a printing and dyeing waste water advanced treatment recovery method which comprises a waste water advanced treatment system formed by a biological treatment system and a follow-up materialization precision treatment system; wherein the biological treatment system comprises a grating collector well (1), an adjusting tank (2), an anaerobic hydrolysis acidification tank (3),an aerobic biological contact oxidation tank (4), a biochemistry settling tank (5) and a biological aerated filter (6); wherein the materialization precision treatment system comprises a compound water purification system (7), an active carbon adsorption system (8), an ion exchange resin (9) and a precise filtering system (10); the grating collector well (1), the adjusting tank (2), the anaerobichydrolysis acidification tank (3), the aerobic biological contact oxidation tank (4), the biochemistry settling tank (5) and the biological aerated filter (6), the water purification system (7), the active carbon adsorption system (8), the ion exchange resin (9) and the precise filtering system (10) form a set of complete yarn dyeing waste water advanced treatment technological process. The method is suitable for spinning printing and dyeing enterprises limited by output of supplying water or discharge of water and realizes the energy conservation and emission reduction of the spinning printing and dyeing enterprises and the reduced operational cost.

Description

technical field [0001] The invention relates to an advanced treatment method for printing and dyeing wastewater, including two parts: a biological treatment system and a physical and chemical treatment system, the two parts constitute a complete technological process for the advanced treatment of printing and dyeing wastewater, so as to realize the technological reuse of the advanced wastewater treatment. The present invention is applicable to textile printing and dyeing enterprises subject to water supply restrictions (especially water-shortage areas, including water-quality water-shortage areas) or drainage restrictions (total control of enterprise sewage discharge), and realizes energy-saving emission reduction and reduced operation of textile printing and dyeing enterprises cost. Background technique [0002] The textile dyeing and finishing industry is an important part of my country's national economy, and about 120 million people are directly engaged in the production...

AI Technical Summary

Problems solved by technology

Some studies have used the advanced treatment process of diatomite to realize the advanced treatment of printing and dyeing wastewater by using the functions of flocculation, adsorption and filtration of diatomite, but diatomite cannot remove salts and cannot solve the accumulation of salts problems, and a certain amount of physical and chemical sludge will be generated during the use process

There are also studies using the process of "ultrafiltration membrane + reverse osmosis membrane" to achieve advanced treatment of printing and dyeing wastewater by using membrane technology, but the investment and operation costs of the membrane process are too high, and the tail water of the biological treatment of dyeing and finishing wastewater contains a large amount of colloids , it is easy to cause membrane fouling, and the service life of the membrane will be greatly reduced

Images