System and method for advanced treatment and reuse of dyeing wastewater

A technology for advanced treatment of printing and dyeing wastewater, applied in water/sewage treatment, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of low pulverized coal adsorption efficiency, long hydraulic retention time, and electrode short circuit and other problems, to achieve the effect of long working life, short residence time and low equipment investment cost

Active Publication Date: 2010-07-14
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent application number 2008101951846 discloses "A Method for Advanced Treatment of Printing and Dyeing Wastewater". This method uses pulverized coal to statically adsorb the tail water that has undergone biochemical-physicochemical treatment. The adsorption efficiency is not high
The Chinese patent application with the application number 200710130832.5 discloses "A Method for Advanced Treatment of Textile Printing and Dyeing Wastewater". This method uses an electrocatalytic device filled with activated carbon to treat wastewater, and requires regular replenishment of activated carbon. Because activated carbon has good electrical conductivity, it is easy to appear. There is a certain potential safety hazard in the phenomenon of short-circuiting the electrodes.

Method used

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  • System and method for advanced treatment and reuse of dyeing wastewater

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Embodiment 1

[0032] Such as figure 1 As shown, on the basis of the traditional anaerobic-aerobic-coagulation process structure, the printing and dyeing wastewater advanced treatment and reuse system of the present invention is added: the system includes an intermediate water tank 1, an acidification tank 2, a salt water tank 3, and an electrochemical system 4 , PH neutralization pool 5 and reuse pool 6; the intermediate pool 4, acidification pool 5, electrochemical system 4, pH neutralization pool 5 and reuse pool 6 are connected in sequence via PPR pipes; the input of the salt pool 3 The end is connected to the intermediate pool, and the output end is connected to the electrochemical system; the electrochemical system 4 is composed of a potentiostat, an electrode group and an electrolytic cell. The electrode group is arranged in parallel and alternately with the anode group and the cathode group, and the cathode group is a mesh metal Titanium, the anode group is a mesh titanium-based Pt co...

Embodiment 2

[0039] Such as figure 1 As shown, on the basis of the traditional anaerobic-aerobic-coagulation process structure, the printing and dyeing wastewater advanced treatment and recycling system of the present invention is added: the system includes an intermediate water tank 1, an acidification tank 2, a salt water tank 3, and an electrochemical system 4 , PH neutralization pool 5 and reuse pool 6; the intermediate pool 4, acidification pool 5, electrochemical system 4, pH neutralization pool 5 and reuse pool 6 are connected in sequence via PVC pipes; the input of the salt pool 3 The end is connected to the intermediate pool, and the output end is connected to the electrochemical system; the electrochemical system 4 is composed of a potentiostat, an electrode group and an electrolytic cell. The electrode group is arranged in parallel and alternately with the anode group and the cathode group, and the cathode group is a mesh SUS304 Stainless steel, the anode group is a mesh titanium...

Embodiment 3

[0046] Such as figure 1 As shown, on the basis of the traditional anaerobic-aerobic-coagulation process structure, the printing and dyeing wastewater advanced treatment and reuse system of the present invention is added: the system includes an intermediate water tank 1, an acidification tank 2, a salt water tank 3, and an electrochemical system 4 , PH neutralization pool 5 and reuse pool 6; the intermediate pool 4, acidification pool 5, electrochemical system 4, pH neutralization pool 5 and reuse pool 6 are connected in sequence via PPR pipes; the input of the salt pool 3 The end is connected to the intermediate pool, and the output end is connected to the electrochemical system; the electrochemical system 4 is composed of a potentiostat, an electrode group and an electrolytic cell. The electrode group is arranged in parallel and staggered between the anode group and the cathode group, and the cathode group is a plate-shaped metal Copper, the anode group is a plate-shaped titan...

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Abstract

The invention discloses a system and method for advanced treatment and reuse of dyeing wastewater. The system comprises an intermediate pool, an acidification pool, a brine pool, an electrochemical system, a pH neutralizing pool and a reuse pool, wherein the intermediate pool, the acidification pool, the electrochemical system, the pH neutralizing pool and the reuse pool are sequentially connected, the input end of the salt water pool is connected with the intermediate pool; and the output end thereof is connected with the electrochemical system. The method comprises the steps: tail water after undergoing the traditional anaerobic-aerobic-coagulation treatment of dyeing wastewater is equalized in quantity and quality in the intermediate pool and then is led into the acidification pool, the pH value of the tail water is adjusted to be acidic by sulphuric acid, and the acidified tail water is pumped into the electrochemical system; the tail water is mixed with strong brine from the brine pool and then is treated by electrolytic oxidation; and then the tail water after undergoing the electrolytic oxidation is led into the pH neutralizing pool, the Ph value of the tail water is adjusted to 7 to 9 by caustic soda, and finally the tail water is sent to the reuse pool to be discharged or reused. The invention does not need add any oxidant and reductant, and has low operation cost andno secondary pollution.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and particularly relates to a system and method for electrochemical advanced treatment of printing and dyeing wastewater, which is suitable for advanced treatment or reuse of tail water after anaerobic-aerobic-coagulation treatment. Background technique [0002] The printing and dyeing process consumes a lot of water and is one of the major water users. Printing and dyeing wastewater has great changes in water quality, high impurity content, deep color, and extremely difficult to treat. It is a serious hazard to receiving water bodies. Its reuse rate is only 6% to 7%, which is the lowest level in various industries. With the rapid economic development, rapid population increase, and continuous deterioration of the environment, in the past ten years, some regions have successively promulgated local emission standards that are stricter than the original national standards to curb the trend of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/66C02F1/46C02F1/461
Inventor 杨洁李伟善徐宏康
Owner SOUTH CHINA NORMAL UNIVERSITY
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