Treatment device and treatment method for dyeing and printing auxiliary wastewater
A technology for printing and dyeing auxiliaries and treatment devices, which is applied in the field of refractory biodegradable chemical wastewater treatment, can solve the problems of increased operating cost, low denitrification rate, and low treatment efficiency of refractory organic matter, and achieves a high degree of automation and operation management. Convenience, long-term stable and reliable treatment effect
Inactive Publication Date: 2013-11-13
ZHEJIANG UNIV +1
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Problems solved by technology
This kind of series process has disadvantages such as high operating cost due to external carbon source, low treatment efficiency of refractory organic matter, and low nitrogen removal rate in the treatment of printing and dyeing auxiliaries wastewater.
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[0019] Take the pilot project of wastewater treatment of printing and dyeing auxiliaries in a large-scale printing and dyeing auxiliaries production enterprise as an example. The wastewater treatment capacity of printing and dyeing auxiliaries is 6 tons per day. l. Printing and dyeing auxiliary wastewater mainly contains surfactants, emulsifiers, defoamers, cosolvents, stearic acid, polyether polyols, toluene diisocyanate, melamine, alkyl polyoxyethylene ethers, hydroxyethyl acrylate, methyl Refractory organic substances such as acrylates.
[0020] The treatment device for printing and dyeing auxiliary wastewater handles the above-mentioned wastewater through the following steps:
[0021] 1) The wastewater of printing and dyeing auxiliaries enters the coagulation and sedimentation tank 1, and the coagulation and sedimentation agents polyaluminum chloride and polyacrylamide are added. The mass ratio of polyaluminum chloride and polyacrylamide to the wastewater of printing and ...
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Abstract
The invention relates to a treatment device and treatment method for dyeing and printing auxiliary wastewater, belonging to the technical field of nonbiodegradable chemical industry wastewater treatment. The treatment device and treatment method for dyeing and printing auxiliary wastewater aim to overcome the defective characteristics of high nondegradable organic substance concentration and lack of carbon sources in the dyeing and printing auxiliary wastewater. The device main body is composed of a coagulative precipitation tank, a hydrolysis and acidification tank, a denitrification tank and an MBR (membrane bioreactor) reaction tank, a buffer loop tank and the like. The invention mainly utilizes reinforced hydrolysis and acidification of the hydrolysis and acidification tank to convert the nonbiodegradable organic substances and enhance the carbon source content in the wastewater, and utilizes the denitrification tank and the MBR reaction tank to remove nitrogen and organic substances. The device has the advantages of high automatic control degree, stable and reliable treatment effect and moderate operating cost, is convenient for management, and can adapt to great fluctuations of water quality.
Description
technical field [0001] The invention relates to a treatment device for printing and dyeing auxiliary wastewater and a treatment method thereof, and belongs to the technical field of refractory biodegradable chemical wastewater treatment. Background technique [0002] In recent years, my country's printing and dyeing auxiliaries industry has developed rapidly. After 2000, the output of printing and dyeing auxiliaries in my country has maintained a growth rate of about 10%. At present, there are more than 1,500 kinds of textile printing and dyeing auxiliaries in 29 categories, including leveling agents, defoamers, dyeing accelerators, emulsifiers, dispersants, adhesives, color fixing agents, fluorescent whitening agents, insurance powder etc. During the production process, printing and dyeing auxiliaries manufacturers will discharge a large amount of refractory and high-concentration organic wastewater with complex components and variable properties. Because of the high conc...
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IPC IPC(8): C02F9/14
Inventor 吴伟祥孙斌孙法迁井上公平张好峰平冈睦久
Owner ZHEJIANG UNIV