Printing and dyeing wastewater deep treatment method and equipment

A technology for advanced treatment of printing and dyeing wastewater, applied in textile industry wastewater treatment, water/sewage treatment, special compound water treatment, etc., can solve the problems of limited water quality improvement, achieve low cost, improve use efficiency, and reduce adsorption load Effect

Pending Publication Date: 2019-04-09
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

[0004] The discharge of industrial wastewater in the textile dyeing and finishing industry ranks third in China's industrial wastewater discharge. Reuse of reclaimed water after advanced treatment of printing and dyeing wastewater through ultrafiltration workshops can effectively alleviate the shortage of water resources, but the extent to which ordinary advanced treatment can improve water quality limited

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  • Printing and dyeing wastewater deep treatment method and equipment

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Embodiment Construction

[0026] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0027] refer to figure 1 , In one embodiment, an advanced treatment equipment for printing and dyeing wastewater, including a Fenton / coagulation / sedimentation system and a biological activated carbon filter.

[0028] The Fenton / coagulation / sedimentation system includes a regulating tank, a Fenton reaction tank and a sedimentation tank, the pH is adjusted before the Fenton reaction in the regulating tank, and the catalyst is added at the tail end of the regulating tank; Hydrogen peroxide is added in the early stage of the Fenton reaction tank, PFS is added in the middle and late stages of the Fenton reaction tank according to the water quality conditions, and lye is added at the end of the Fenton reaction tank to adjust the pH of the effluent; in the se...

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Abstract

The invention provides a printing and dyeing wastewater deep treatment method and equipment. The method comprises the following steps: regulating the pH value in an adjustment tank before a Fenton reaction, and adding a catalyst at the tail end of the adjustment tank; adding hydrogen peroxide in the early stage of a Fenton reaction tank, and adding PFS in the middle-late stage of the Fenton reaction tank according to the water quality condition, and adding an alkaline liquor at the tail end of the Fenton reaction tank to adjust the pH value of effluent; adding PAC at the coagulation section ofa sedimentation tank, and adding PAM accordingly, performing a coagulation reaction, and separating mud and water at the sedimentation section of the sedimentation tank; and performing biodegradationand adsorptive filtration on the effluent of the sedimentation tank in a bio-activated carbon filter tank. The printing and dyeing wastewater deep treatment method and equipment have low cost and efficient treatment.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method and equipment for advanced treatment of printing and dyeing wastewater. Background technique [0002] With the rapid development of industry, a lot of refractory wastewater has been produced. Among them, the wastewater produced by textile dyeing and finishing has the characteristics of refractory degradation and heavy metal residues. After this kind of industrial wastewater enters the environmental water body, it will cause serious damage to aquatic organisms and even human health. hazards. In order to remove the biodegradability of refractory organic matter in wastewater and explain some of the refractory organic matter, the Fenton process is widely used. The Fenton process can oxidatively degrade many types of organic matter, because the essence of the Fenton reaction is H 2 o 2 in Fe 2+ Under the catalytic action, it can generate oxidation-reduction potential second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/30C02F101/30
CPCC02F9/00C02F3/00C02F1/722C02F1/66C02F1/56C02F1/5236C02F2101/30C02F1/283C02F1/001C02F2103/30C02F2305/026
Inventor 吴乾元胡洪营杜鑫
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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