Printing and dyeing wastewater treatment system

Abstract

The invention belongs to the water treatment industry, and discloses a printing and dyeing wastewater treatment system. The system comprises a regulating tank, an anaerobic tank, a contact oxidation tank, a secondary sedimentation tank, a carbon fiber ionic membrane treatment device, a coagulating sedimentation tank (6), a middle tank, a filter, an ion exchange tower, a middle water recycling tank and a sludge thickener (12). According to the invention, the existing mature wastewater treatment device is optimally recombined, and by the measures of optimizing the anaerobic reaction tank, applying the carbon fiber ionic membrane treatment device in an advanced treatment system, and connecting a manganese sand filter, an ultrafilter and the ion exchange tower in series, not only the problem of advanced treatment of printing and dyeing wastewater is effectively solved, but also the COD(Chemical Oxygen Demand), chroma, SS(Suspended Solids), total hardness, pH and the like of the water all reach the water recycling standards in the printing and dyeing industry; and the cost of investment of the whole process disclosed by the invention is low, and the operating cost for treating 1 ton wastewater is only 2 yuan, which is 1 / 3 of that of the existing printing and dyeing wastewater recycling process.

Description

technical field [0001] The invention belongs to the water treatment industry and relates to a printing and dyeing wastewater treatment system. Background technique [0002] The textile industry is a traditional pillar industry in my country, including five parts: textile, printing and dyeing, chemical fiber, clothing and textile special equipment manufacturing. With the rapid development of the national economy, my country's printing and dyeing industry has also entered a period of rapid development. The level of equipment and technology has been significantly improved, and the production process and equipment have been continuously updated. Printing and dyeing enterprises, especially private printing and dyeing enterprises, have developed very rapidly. [0003] However, there is a certain gap between the technology, equipment and management level of my country's textile printing and dyeing industry and developed countries. The energy consumption and water consumption per un...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a solution that has a good treatment effect and the investment and operation cost is only the cost of membrane treatment in view of the unsatisfactory advanced treatment effect of printing and dyeing wastewater in the prior art, the large investment in reverse osmosis membrane treatment, and the high operating cost. 1 / 3 of printing and dyeing wastewater treatment system

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