Microelectrolytic treatment process of printing and dyeing waste water

A technology for treating process, printing and dyeing wastewater, applied in textile industry wastewater treatment, return water treatment, multi-stage water treatment, etc. Effect of SS concentration

Pending Publication Date: 2017-11-17
云南今业生态建设集团有限公司
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  • Application Information

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Problems solved by technology

At present, the printing and dyeing wastewater treatment process of such textile enterprises generally adopts "coagulation pretreatment + A 2 /O biological treatment + coagulation treatment + air flotation + filtration" combination process, b

Method used

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  • Microelectrolytic treatment process of printing and dyeing waste water

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Embodiment Construction

[0031] Such as figure 1 As shown, a micro-electrolysis treatment process of printing and dyeing wastewater is carried out according to the following steps:

[0032] (1) Wastewater pretreatment:

[0033] A. Air flotation treatment: After the wastewater from each workshop is collected, it is pumped to the air flotation tank, and at the same time, air is introduced into the air flotation tank to perform air flotation treatment on the wastewater to remove suspended matter in the water. The residence time of the wastewater in the air flotation tank is 2 hours;

[0034] B. Conditioning treatment: the effluent of the air flotation tank is lifted to the regulating tank by a pump, the wastewater is pre-acidified, and perforated aeration pipes are arranged in the regulating tank.

[0035] Perforated aeration is carried out in the regulating tank, and the wastewater is stirred and homogenized. The residence time of the wastewater in the regulating pond is 36 hours, and the effluent of...

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Abstract

The invention belongs to the field of treatment of chemical waste water and particularly relates to a microelectrolytic treatment process of printing and dyeing waste water. The microelectrolytic treatment process has the characteristics that an air flotation pool is arranged at the most front end to remove suspended solids in the water, simultaneously carrying out iron-carbon microelectrolytic reaction according to the characteristics of the waste water, carrying out ring opening and chain breaking on nonbiodegradable pollutants in the waste water so as to improve the biodegradability of the waste water, effectively enhance the pretreatment effect and create beneficial conditions for following biochemical treatment; due to addition of a submersible stirring machine in an anaerobic pool, the hydrolytic acidification degree of the waste water is improved; a flat-plate membrane is arranged in an aerobic pool, and by utilization of a membrane bioreactor (MBR) technology, separation of HRT (Hydraulic Retention Time) from SRT (Sludge Retention Time) is realized, sludge load is increased, the biological treatment is stabilized, the SS (Suspended Solid) concentration in the discharged water is effectively reduced and the sewage treatment load is increased, so that the effect of biological treatment of the process is effectively stabilized and the quality of the discharged water is stabilized; and with the purpose of preventing the condition of unstable system operation, active carbon is utilized for adsorption and filtration to guarantee the standard of the discharged water and the deep treatment effect.

Description

technical field [0001] The invention belongs to the field of chemical wastewater treatment, and in particular relates to a micro-electrolysis treatment process for printing and dyeing wastewater. Background technique [0002] The textile printing and dyeing industry is one of the industrial sectors in my country that consumes a large amount of water and discharges a large amount of wastewater. According to incomplete statistics, domestic printing and dyeing enterprises discharge 3 to 4 million tons of wastewater every day. The discharged wastewater contains the entrainment of the fiber raw material itself, as well as the slurry, postal agents, dyes and chemical additives used in the processing process. It has the characteristics of high biochemical oxygen demand, high chroma, and high pH value, and is difficult to treat. of industrial wastewater. [0003] For textile enterprises that use cotton production scraps mainly denim to reprocess fiber production, the production pr...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/12C02F103/30C02F101/30
CPCC02F9/00C02F11/122C02F3/302C02F2101/308C02F2001/007C02F2103/30C02F2301/08C02F2301/04C02F1/24C02F1/283C02F1/001C02F1/46176C02F1/56C02F1/5236C02F1/66
Inventor 邓辅商邓辅唐曾郴林
Owner 云南今业生态建设集团有限公司
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