Biological combined reactor used for printing and dyeing waste water processing, device and method

Abstract

The invention provides a biological combined reactor used for printing and dyeing waste water processing. The reactor comprises an anaerobic baffling reacting zone, an anaerobic return chamber and an aerobiotic dynamic reaction zone. The water inlet of the reactor is disposed in the anaerobic baffling reacting zone. The anaerobic baffling reacting zone is compartmented into two or more baffling chambers by compartmenting walls. The baffling chambers are provided with vertical baffling plates and inoculated with active particle sludge accounting for one third to a half of the effective volume of the baffling chambers. The aerobiotic dynamic reaction zone is compartmented into a first compartment, a second compartment and a third compartment by two baffling plates. The second compartment is inoculated with one third to a half of the active particle sludge. The second compartment is provided with a grating net and an aerating system is disposed on the grating net. The first compartment and the third compartment are respectively provided with a bag type membrane assembly. The invention also provides a printing and dyeing waste water processing device comprising the reactor and a printing and dyeing waste water processing method by utilization of the reactor. The reactor, the device and the method are advantaged by simple process, low cost, stable running, good discharging water quality, and the like.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a device and method suitable for treating mixed printing and dyeing wastewater with high COD concentration, high ammonia nitrogen, and high chroma produced in processes such as alkali weight reduction and desizing. Background technique [0002] The comprehensive treatment of industrial wastewater has become one of the major problems to be solved in contemporary environmental work. Among them, the water consumption of the textile dyeing and finishing industry is the second largest among all industries in my country, and the wastewater discharge ranks the sixth in the country, of which printing and dyeing wastewater accounts for more than 80% of the national textile wastewater discharge. Existing printing and dyeing factories mainly process pure cotton fabrics, cotton, chemical fiber blended fabrics, and purified fiber fabrics, which are usually divided into main processing proc...

AI Technical Summary

Problems solved by technology

In fact, in the process of printing and dyeing wastewater treatment, alkali reduction wastewater, printing wastewater and other high-concentration printing and dyeing wastewater are mixed for post-treatment, which not only increases the difficulty and cost of comprehensive printing and dyeing wastewater treatment, but also makes it difficult for conventional wastewater treatment processes to achieve Up-to-standard discharge after high standard treatment

[0003] Refractory complex organic substances such as macromolecular polymers, dyes, PVA, and additives produced in the various treatment processes of printing and dyeing wastewater are dissolved into a large amount of alkali reduction printing and dyeing wastewater, which greatly increases the cost of alkali reduction and desizing printing and dyeing. Due to the difficulty of wastewater treatment, traditional biological treatment methods cannot achieve good treatment results.

Therefore, printing and dyeing wastewater has the characteristics of complex water quality, large water volume, and difficult biological treatment, which has always been a hot spot and difficulty in the field of wastewater treatment.

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