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Recycling treatment process of printing and dyeing wastewater

A printing and dyeing wastewater treatment technology, applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effect of small amount, meeting the needs of production water and high recycling rate of wastewater

Inactive Publication Date: 2014-01-08
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a printing and dyeing wastewater reuse treatment process in order to overcome the defect that the water quality of the secondary biochemical effluent of printing and dyeing wastewater in the prior art still cannot meet the standards of reuse water and production water

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  • Recycling treatment process of printing and dyeing wastewater
  • Recycling treatment process of printing and dyeing wastewater
  • Recycling treatment process of printing and dyeing wastewater

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Embodiment 1

[0040] Secondary biochemical effluent (about 5000m 3 / d, the water quality parameters are shown in Table 1) After being homogenized in the adjustment tank for 1h, in the pipeline with PAC (25mg / L, with Al 3+ meter) mixing, the initial coagulation treatment was carried out under the condition of pH 8, and the rapid stirring (G value 500s -1 )1min, stirring slowly (G value 40s -1 ) for 15 minutes, precipitation for 1 hour, and the temperature is 25°C. After the mud and water are separated, the supernatant is pumped into the activated carbon / ozone bubbling reaction tower, and the chemical sludge is sent to the thickening tank, and then sent out for disposal after dehydration (the removed water returns to the regulating tank). The water yield in this process is above 94%.

[0041] In the bubbling reaction tower, gas-liquid reverse contact reaction, granular activated carbon (dosing 10g per unit reactor volume (L)) is flowing under the action of airflow (unit reactor volume (L) ...

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Abstract

The invention discloses a recycling treatment process of printing and dyeing wastewater, comprising the following steps of: (1) carrying out primary coagulation treatment on secondary biochemical output water of homogenized printing and dyeing wastewater; (2) carrying out active carbon / ozone oxidization treatment on liquid supernatant obtained from mud-water separation; (3) carrying out secondary coagulation treatment on output water from the step (2); and (4) filtering the liquid supernatant obtained from the step (3) and sequentially passing through cation exchange resin and anion exchange resin to obtain a product. The process has the advantages of being simple in flow, small in use amount of active and ozone, high in wastewater recycling rate (more than 75%), stable and efficient in operation, and good in applicability; and indexes of organic matters and inorganic salts in treated output water are better than those of FZ / T01107-2011 Water Quality Standard of Recycle Water of Textile Dyeing Industry and meet requirement of production water supply.

Description

technical field [0001] The invention relates to a printing and dyeing wastewater reuse treatment process. Background technique [0002] The printing and dyeing (dyeing and finishing) industry is a necessary link in the production chain of the textile industry, and its sewage discharge accounts for more than 80% of the textile industry, ranking fourth among all industries in the country (2009). In view of the current situation of national shortage of water resources and aggravated water pollution, national and regional pollutant discharge standards are becoming increasingly strict, which poses great challenges to the development of the printing and dyeing industry. The advanced treatment and reuse of wastewater for production is an important way to control pollutant discharge and achieve sustainable development. At present, the reuse rate of printing and dyeing wastewater is only 7% (2009), which is the lowest among all industries, and most of the reused water only plays a l...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/42C02F1/52C02F103/30
Inventor 刘勇弟钱飞跃孙贤波化艳娇
Owner EAST CHINA UNIV OF SCI & TECH