Method for advanced treatment and reuse of printing and dyeing wastewater pre-processed by macroporous resin

Abstract

The invention discloses a method for advanced treatment and reuse of printing and dyeing wastewater pre-processed by macroporous resin. The method comprises the following steps: taking the printing and dyeing wastewater for the secondary treatment; performing conducting Fenton reaction precipitation, ultra-filtrate membrane filtration, macroporous resin absorption and reverse osmosis membrane separation on discharged wastewater subjected to the treatment, wherein the output water of the reverse osmosis membrane is adopted as the high-quality water for recycling for enterprises, and the concentrated water of the reverse osmosis membrane is emitted on standard, or is emitted to a sewage plant through nano tubes for centralized processing. The method has the advantages that (1) the regular pre-processing technology and multi-media filtration procedure before the macroporous resin is eliminated, and the investment and operation cost is reduced; (2) the ultra-filtrate membrane filtration is adopted as the pre-processing of the macroporous resin, the input water quality is improved, pollutants, such as suspended solids, in water are greatly reduced, the service life and the regeneration period are prolonged, and the operation cost is lowered; (3) the macroporous resin absorption is added as the pre-processing of the reverse osmosis membrane on the basis of the ultra-filtration, the input water quality of the reverse osmosis membrane is improved, pollution is relieved, the service life and the cleaning period are prolonged, and the water output of the reverse osmosis membrane is improved.

Description

Technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a method for advanced treatment and reuse of printing and dyeing wastewater using macroporous resin pretreatment. Background technique [0002] China is already one of the 13 countries in the world with extremely poor water resources. The per capita water resources are less than 1 / 4 of the world average. The serious pollution of the water environment makes the already scarce water resources worse. The shortage of water resources and pollution of the water environment have severely restricted the sustainable development of my country's economy and society. Sewage recycling is an inevitable choice to realize the sustainable use of water resources; sewage recycling is the use of sewage as a resource for regeneration and recycling. [0003] my country is the world's largest printing and dyeing country, and the output of printing and dyeing fabrics accounts ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this invention is that the secondary effluent directly enters the resin, and the suspended matter in the wastewater will deposit on the resin, which will block the micropores of the resin, thereby reducing the working exchange capacity of the resin.

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