Advanced treatment method and equipment for printing and dyeing wastewater

A technology for advanced treatment of printing and dyeing wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as increased turbidity of effluent, achieve load reduction, The removal effect is remarkable and the filter cycle is long

Inactive Publication Date: 2010-11-17
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combined process of the present invention has a very significant effect on the removal of turbidity substances in printing and dyeing wastewater, and the micro-flocculation deep-bed filtration process is used as a pretreatment process for ultrafiltration to a certain extent, which greatly reduces the load on the ultrafiltration membrane and reduces the cost of the membrane. The probability of pollution, and ultrafiltration as a follow-up treatment can solve the problem of increased turbidity in the initial stage of deep bed filtration due to the increase in filtration rate

Method used

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  • Advanced treatment method and equipment for printing and dyeing wastewater
  • Advanced treatment method and equipment for printing and dyeing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The waste water to be treated is sucked from the water tank by the lifting pump 11 through the raw water tank 10, and the flocculant is added by the peristaltic pump 3, and mixed with the sucked raw water in the pipeline mixer 4, and the water inlet mode of the pipeline mixer is lateral Flow into the water so that the flocculant and waste water can be mixed quickly and effectively. The mixing time is 6-8s. The mixed effluent directly enters the fiber ball filter column 5 through the connecting pipe. After the effluent enters the water storage tank 22, the pressurized water pump 24 passes through the security filter element 32 , and then enter the ultrafiltration membrane modules 39, 41 through the connecting pipes, the ultrafiltration membrane permeates the water and enters the clean water tank 31, and the concentrated solution can be mixed with the incoming water through the valve 26 and returned to the pressurized water pump 24 before entering the ultrafiltration membra...

Embodiment 2

[0031] The test raw water is taken from the effluent of the aerobic contact oxidation tank of the laboratory printing and dyeing wastewater treatment device. The turbidity of the wastewater is between 52.4 and 93.6 NTU. The chromaticity of the wastewater is mainly produced by the reactive dye reactive red K-2BP. The water passes through the raw water tank 10 by The lifting pump 11 sucks from the water tank, and the flocculant polyaluminum ferric chloride (PAFC) is added by the peristaltic pump 3, and the dosage is 10 mg / L, and mixed with the sucked raw water in the pipeline mixer 4, and the pipeline The water inlet method of the mixer adopts side flow water, so that the flocculant and waste water can be mixed quickly and effectively. The mixing time is 6-8s. The mixed effluent directly enters the fiber ball filter column 5 through the connecting pipe, and the filtration speed is 40m / h , the filtration period is 40 to 48 hours. After the effluent enters the water storage tank 22...

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Abstract

The invention relates to an advanced treatment method of printing and dyeing wastewater and the equipment thereof. The advanced treatment of the printing and dyeing wastewater is realized by the combined process of the ultrafiltration technology and the micro flocculation deep-bed filtration technology which take the self-made polyester high elastic yarn fiber ball filter material as the filter medium. The equipment comprises a fiber ball filter column (5) and an ultrafiltration membrane component (39), (41), etc. The combined process has remarkable removal effect on the turbid material in the printing and dyeing wastewater. Furthermore, the micro flocculation deep-bed filtration technology is taken as the pretreatment technology of the ultrafiltration to some extent, which greatly reduces the load of the ultrafiltration membrane and decreases the probability of occurrence of membrane pollution. At the same time, the ultrafiltration is taken as the subsequent treatment, which can solve the problem of raising water turbidity at initial stage caused by the increase of the filtration speed when the deep-bed filtration carries out.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a method and equipment for advanced treatment of printing and dyeing wastewater, which is combined with micro-flocculation deep-bed filtration technology and ultrafiltration technology using self-developed polyester high-elastic fiber ball filter material as the filter medium A combined process for advanced treatment of printing and dyeing wastewater. Background technique [0002] The rapid development of the textile printing and dyeing industry has also brought many negative impacts. At present, the problem of large water consumption and wastewater discharge in my country's printing and dyeing industry is particularly prominent. The water consumption per unit product is generally about three times that of developed countries. Although my country has started research on textile printing and dyeing wastewater treatment technology since the 1970s, due to factors such as capital inves...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/52
Inventor 刘亚男薛罡高品刘振鸿马钟瑛
Owner DONGHUA UNIV
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