Zero discharge processing EBM method for dyeing waste water

Abstract

The invention provides an EBM method for zero drainage treatment of dyeing wastewater. The method comprises that: step 1, a centrifuge dripping counter current washing process is carried out in a dyeing rinsing process; step 2, dyeing initial wastewater is subjected to standard-reaching treatment, step 2a, primary electro-oxidation is carried out, comprising micro-electrolysis, electro-oxidation,Fenton action and microwave, step 2b, biochemical treatment is carried out, comprising time delay anaerobism and short time aerobism, and superior bacteria is added in the same time, and step 2c, secondary electro-oxidation is carried out again after the biochemical treatment, comprising electrolytic flocculation, electric de-colorization and electro-oxidation; step 3, standard-reaching drainage water is subjected to deep purification treatment, which is to enter an electric desalination film system for treatment, plain water flows out after the standard-reaching drainage water is subjected to sand leach, fiber filtration, electric desalination and RO film in sequence, and can be recycled, and high concentrated water flows out from electric desalination. The treatment method saves water and energy, reduces COD drainage of the dyeing wastewater, and improves the de-colorization rate, the turbidity and the removal rate of ammonia nitrogen.

Description

Technical field [0001] The invention relates to a treatment method for the industrial wastewater of printing and dyeing enterprises, which saves water and energy, significantly reduces COD (chemical oxygen demand) discharge of printing and dyeing wastewater, improves decolorization rate, turbidity and ammonia nitrogen removal rate, and promotes the textile printing and dyeing industry Zero discharge of wastewater. Background technique [0002] The textile industry creates a large amount of GDP and absorbs a large number of employed people. It is a pillar industry of our country. The upstream industry of this industry is textile printing and dyeing. The environmental characteristic of the industry is that it consumes a lot of water resources and produces a lot of high pollution. Treat wastewater. It is estimated by literature that in 2006, the annual physical processing volume of China's printing and dyeing textiles was in the range of 4 to 5 million tons, and the annual waste wa...

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the problems of high water consumption, high energy consumption, high COD discharge, low decolorization rate, low turbidity, low COD ammonia nitrogen removal rate, and easy clogging of RO membrane in the existing printing and dyeing process. Problem, propose a zero-discharge treatment method for printing and dyeing wastewater that saves water and energy, significantly reduces COD (chemical oxygen demand) discharge of printing and dyeing wastewater, improves decolorization rate, turbidity and ammonia nitrogen removal rate, and promotes zero discharge of wastewater in the textile printing and dyeing industry

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