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Method for treating printing and dyeing wastewater

A technology for printing and dyeing wastewater and a treatment method, applied in the field of water treatment, can solve the problems of large investment in reverse osmosis membrane treatment, high operating cost, unsatisfactory effect of advanced treatment of printing and dyeing wastewater, etc., and achieves stable operation, power saving and investment cost. low effect

Inactive Publication Date: 2011-01-19
JIANGSU QINGHAN ENVIRONMENTAL PROTECTION TECH
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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 process

Method used

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  • Method for treating printing and dyeing wastewater

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Embodiment 1

[0021] The process flow is as follows:

[0022] Waste water → grid → regulating tank → pulse anaerobic reactor → biological contact oxidation tank → secondary sedimentation tank → carbon fiber ion membrane treatment device → coagulation sedimentation tank → intermediate tank → manganese sand filter → precision filter → ion exchange tower →Reclaimed water reuse pool

[0023] The printing and dyeing wastewater is filtered through a 2mm grid to remove impurities with large particles before entering the regulating tank. The wastewater is fully stirred and mixed in the regulating tank to uniform the water quality and quantity, and reduce the pH of the wastewater to within 11. The effluent of the regulating tank is pumped to the pulse anaerobic reactor, and the facultative microorganisms in the activated sludge in the pulse anaerobic reactor acidify and hydrolyze the macromolecular organic matter, degrade the macromolecules into small molecular biochemical substances, and improve th...

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Abstract

The invention belongs to water treatment industries and discloses a method for treating printing and dyeing wastewater. The method comprises the following steps of: the printing and dyeing wastewater is introduced into a pulse anaerobic reactor for anaerobic treatment; effluent subjected to the anaerobic treatment enters a biological contact oxidation pond; the effluent from the biological contact oxidation pond automatically flows into a secondary clarifier for solid-liquid separation; and the effluent from the secondary clarifier enters an advanced treatment system for advanced treatment so as to finally obtain recyclable reclaimed water. The advanced treatment system comprises a carbon fiber ionic membrane treatment device, a coagulative precipitation tank, a manganese sand filter, a precise filter and an ion exchange tower. The method optimally recombines the conventional mature wastewater treatment processes and has low investment cost. The operational cost is 2 Yuan for treating 1 ton of wastewater and is one third of that of the conventional printing and dyeing wastewater recycling process.

Description

technical field [0001] The invention belongs to the water treatment industry and relates to a method for treating printing and dyeing wastewater. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F103/30
Inventor 邵志军李洪芳
Owner JIANGSU QINGHAN ENVIRONMENTAL PROTECTION TECH
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