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Method for recycling textile dyeing and finishing wastewater

A technology for textile dyeing and finishing and wastewater recycling, which is applied in the field of water pollution control research to achieve high industrial application prospects, high water quality and stable operation.

Active Publication Date: 2011-09-21
JIANGSU SHANGDA WATER AFFAIR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to use the anaerobic-aerobic + ozone oxidation disinfection and decolorization process to address the problems of poor biochemical properties, high chroma and high ionic strength in printing and dyeing wastewater, and to strengthen the biodegradation and decolorization process

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  • Method for recycling textile dyeing and finishing wastewater
  • Method for recycling textile dyeing and finishing wastewater

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Embodiment 1

[0047] The multistage circulating aerobic treatment system used in the embodiment of the present invention is composed of anaerobic / anoxic reaction pool A and aerobic reaction pool O in series according to the mode of A-O-A-O-A-O-A, anaerobic / anoxic reaction pool A (effective volume 10L) and The effective volume ratio of the aerobic reaction tank O (effective volume 5L) is 2:1,

[0048] Inoculate the anaerobic granular sludge in the IC reactor (effective volume 50L), and then pass the debugging wastewater into it. Under the condition of neutral pH value, in the anaerobic environment, the sludge is acclimated at 20-40℃, and the COD of the wastewater is adjusted. The concentration starts from 200mg / L and increases the concentration every day (100mg / L increase rate per day) until the raw water enters. The PCR-DGGE method is used to detect the microbial ecology in the wastewater, and to track the IC reactor effluent and biogas production. When the IC reactor The effluent COD can b...

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Abstract

The invention discloses a method for recycling textile dyeing and finishing wastewater, which comprises the following steps of: regulating the pH of the textile dyeing and finishing wastewater in a regulating tank to be 7.0 by using acidic solution, performing coagulative precipitation in a coagulative precipitation tank by using an inorganic flocculating agent, and performing anaerobic treatmentin a high-efficiency anaerobic reactor; performing anaerobic / anoxic and aerobic circulation treatment in a multi-stage circulation aerobic treatment system, wherein the multi-stage circulation aerobic treatment system consists of anaerobic / anoxic reaction tanks A and aerobic reaction tanks O in an A-O-A-O-A-O-A staggered series connection mode; performing coagulative precipitation in a high-efficiency air floatation coagulative precipitation tank; and performing ozone oxidation and disinfection in an ozone oxidation tank to obtain recycled water. Compared with the conventional physical-chemical method, the technology has the advantages that: operating cost is obviously reduced, and over 30 percent of economic benefit is achieved. The quality of the treated water is high, and 70 percent ofrecycling rate can be achieved.

Description

(1) technical fields; [0001] The invention relates to a method for recycling and treating textile dyeing and finishing wastewater, which belongs to the field of water pollution control research. (two) background technology: [0002] Water is the basic condition for human survival and development, and the most important material basis irreplaceable in the production activities of human society. my country is a moderately water-scarce country, and water shortage causes the national industry and agriculture to lose 350 billion yuan every year, and the annual industrial output value loss is about 200 billion yuan. Insufficient supply and demand of water resources has increasingly become a "bottleneck" that affects social and economic development. An important reason for the serious shortage of water resources is the increasing trend of pollution. Among them, the discharge of industrial wastewater, especially textile printing and dyeing wastewater that does not meet the standards...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F103/30
Inventor 荆政郑展望丁青松
Owner JIANGSU SHANGDA WATER AFFAIR
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