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

A macroporous resin, printing and dyeing wastewater technology, applied in chemical instruments and methods, textile industry wastewater treatment, water/sewage multi-stage treatment, etc., can solve problems such as resin blockage, resin work exchange capacity reduction, etc. The effect of saving investment and operating costs, prolonging the service life and regeneration cycle

Inactive Publication Date: 2014-10-15
NINGBO QINGSHUIYUAN WATER TECH
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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 waste

Method used

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

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[0026] The present invention will be described in further detail below in conjunction with the embodiments of the drawings.

[0027] Such as figure 1 Shown is the flow chart of the present invention,

[0028] A method for advanced treatment and reuse of printing and dyeing wastewater using macroporous resin pretreatment, including the following steps:

[0029] Step 1. Fenton reaction: Take the secondary treatment effluent of printing and dyeing wastewater and add acid to adjust the PH value to 3 to 6, then perform Fenton reaction. After the Fenton reaction is completed, add alkali to adjust the pH to 7 to 8, and then add polyacrylamide. Perform coagulation and precipitation; the solubility of polyacrylamide is 1ppm to 10ppm. The Fenton reaction uses ferrous sulfate and hydrogen peroxide as the Fenton reaction agent, and the time of the Fenton reaction is controlled within 1 to 3 hours.

[0030] The above-mentioned printing and dyeing wastewater secondary treatment effluent refers to...

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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 ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/30
Inventor 周宇松陶明杰奚吉刘中亲石申
Owner NINGBO QINGSHUIYUAN WATER TECH
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