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Reusing treatment method for printing and dyeing wastewater

A technology for printing and dyeing wastewater and treatment methods, which is applied in textile industrial wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve the problems of increased difficulty in industrial wastewater treatment, membrane fouling and rapid flux decline, Short service life and other issues, to achieve the effect of simple structure, increased specific surface area, and low infrastructure cost

Inactive Publication Date: 2015-08-12
南通大恒环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing ultrafiltration membrane and reverse osmosis membrane technologies are advanced, they have the disadvantages of increased difficulty in the treatment of highly polluted industrial wastewater, rapid membrane fouling and flux decline, short service life and high cost.

Method used

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  • Reusing treatment method for printing and dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 Shown: the method of the present invention can ensure that the treated effluent reaches the standard stably, and has been successfully operated on many engineering examples. The specific process is as follows:

[0030] (a) After the printing and dyeing wastewater passes through the grid, part of the suspended matter is removed and enters the adjustment tank. The specific operation after entering the coagulation sedimentation tank from the adjustment tank is: put flocculants and coagulants into the printing and dyeing wastewater, and pass through the mixer in the reaction zone. Stop the stirring effect, and control the stirring force and stirring time of the mixer, fully mix the flocculant, coagulant and wastewater, under the function of adsorption, net capture and bridge support of the flocculant and coagulant, the pollutants in the wastewater The flocs will eventually form flocs, and then in the separation area, the flocs will sink to the bottom of th...

Embodiment 2

[0037] On the basis of embodiment 1, change the running parameter in each operation, specifically as follows:

[0038] (a) After the printing and dyeing wastewater passes through the grid, part of the suspended matter is removed and enters the adjustment tank. The specific operation after entering the coagulation sedimentation tank from the adjustment tank is: put flocculants and coagulants into the printing and dyeing wastewater, and pass through the mixer in the reaction zone. Stop the stirring effect, and control the stirring force and stirring time of the mixer, fully mix the flocculant, coagulant and wastewater, under the function of adsorption, net capture and bridge support of the flocculant and coagulant, the pollutants in the wastewater The flocs will eventually form flocs, and then in the separation area, the flocs will sink to the bottom of the tank by their own gravity, and will be discharged into the sludge thickening tank by the scraper and suction machine that wo...

Embodiment 3

[0045] On the basis of embodiment 1, change the running parameter in each operation, specifically as follows:

[0046] (a) After the printing and dyeing wastewater passes through the grid, part of the suspended matter is removed and enters the adjustment tank. After entering the coagulation sedimentation tank from the adjustment tank, the specific operation is as follows: put flocculants and coagulants into the printing and dyeing wastewater, and pass through the agitator in the reaction zone. Stop the stirring effect, and control the stirring force and stirring time of the mixer, fully mix the flocculant, coagulant and wastewater, under the action of the adsorption, net capture and bridge function of the flocculant and coagulant, the pollutants in the wastewater With the initial coagulation of chemicals, flocs are finally formed, and then in the separation area, the flocs sink to the bottom of the tank by their own gravity, and are discharged into the sludge thickening tank by...

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Abstract

The present invention discloses a reusing treatment method for printing and dyeing wastewater. The innovation point is that the method comprises the following step: sequentially feeding the printing and dyeing wastewater into an adjusting pool, a coagulative precipitation tank, a compound aerating activated sludge reaction tank, a hydrolysis acidification pool, a contact oxidation pool, a secondary sedimentation tank, a membrane biological reaction tank and a reverse osmosis reaction tank for recovery processing. The reusing treatment method for printing and dyeing wastewater disclosed by the present invention guarantees stable operation of an advanced treatment system, particularly a reverse osmosis system. Pretreatment by a set coagulating sedimentation process is necessary. The wastewater is purified in the coagulative precipitation tank, and the pollution concentration of effluent is greatly reduced, so that the operation load of subsequent biochemical treatment facilities can be alleviated. An MBR process is added based on conventional secondary bio-treatment, and the quality of the discharging effluent is greatly improved through an efficient interception effect of a membrane on suspended solids and organic matters in the wastewater, so that the recovery of the wastewater by virtue of the reverse osmosis treatment is relatively reliable.

Description

technical field [0001] The invention relates to a recycling treatment method for printing and dyeing wastewater, which belongs to the technical field of environmental protection. Background technique [0002] The printing and dyeing industry is an important part of my country's industry, and its major water users are also major drainage users. With the implementation of the new standard "Water Pollutant Discharge Standard for Textile Dyeing and Finishing Industry" (GB4287-2012), the price of wastewater treatment water has risen, and at the same time, the lack of water resources As a result, the price of tap water has also continued to rise, which has prompted enterprises to integrate advanced wastewater treatment and reuse into the sewage treatment process as a technical means for energy saving and emission reduction. [0003] Printing and dyeing wastewater is one of the main industrial wastewater in my country. It has the characteristics of large water volume, high chroma, a...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
Inventor 陈建周志刚周爱霞王东升李培黄振宇曹斌陈跃曹鑫杰
Owner 南通大恒环境工程有限公司
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