Treatment method of dyestuff wastewater

A dye wastewater and treatment method technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem that wastewater is difficult to achieve better treatment effects, etc.

Active Publication Date: 2018-11-30
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current anaerobic-aerobic process is sometimes still difficult to achieve a good treatment effect on the chromaticity of w

Method used

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  • Treatment method of dyestuff wastewater
  • Treatment method of dyestuff wastewater
  • Treatment method of dyestuff wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The initial content of COD in the dye wastewater is 6000mg / L, the initial chroma is 200 times, and the initial content of SS is 600mg / L;

[0043] The dye wastewater is first homogenized through the regulating tank, and the hydraulic retention time of the dye wastewater in the regulating tank is 12h;

[0044] The dye wastewater after the adjustment tank enters the anaerobic reactor (UASB) for anaerobic treatment. The hydraulic retention time in the anaerobic reactor is 10h, and the oxidation-reduction potential in the anaerobic treatment process is -230mV. The sludge concentration in the tank is 8g / L;

[0045] The dye wastewater after anaerobic treatment enters the anaerobic-aerobic integrated membrane bioreactor (hereinafter referred to as AOMBR) for anaerobic-aerobic cycle treatment. The membrane filaments filled in the reactor are hollow fiber membranes containing quinone groups. The sludge concentration in the AOMBR reactor is 6000m g / L; AOMBR operates according to ...

Embodiment 2

[0051] The initial content of COD in the dye wastewater is 3200mg / L, the initial chroma is 300 times, and the initial content of SS is 300mg / L;

[0052] The dye wastewater is first homogenized through the regulating tank, and the hydraulic retention time of the dye wastewater in the regulating tank is 12h;

[0053] The dye wastewater after the adjustment tank enters the anaerobic reactor (UASB) for anaerobic treatment. The hydraulic retention time in the anaerobic reactor is 12h, and the medium oxidation-reduction potential in the anaerobic treatment process is -200mV. The sludge concentration in the tank is 8g / L;

[0054] The dye wastewater after anaerobic treatment enters the anaerobic-aerobic integrated membrane bioreactor (hereinafter referred to as AOMBR) for anaerobic-aerobic cycle treatment. The membrane filaments filled in the reactor are hollow fiber membranes containing quinone groups, AOMBR The sludge concentration in the reactor is 7500mg / L; AOMBR operates accordi...

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Abstract

The invention provides a treatment method of dyestuff wastewater. The treatment method comprises the following steps: firstly, carrying out homogenization treatment on the dyestuff wastewater so as tobalance the water quality of the dyestuff wastewater from different procedures; then carrying out anaerobic treatment on the homogenized dyestuff wastewater; carrying out the anaerobic treatment to remove a lot of COD (Chemical Oxygen Demand) and SS (Suspended Solids) in the dyestuff wastewater; finally, carrying out anaerobic-aerobic circulating treatment on the dyestuff wastewater subjected tothe anaerobic treatment in a membrane bioreactor. According to the treatment method, the membrane bioreactor is filled with a hollow fiber membrane containing quinonyl and the quinonyl is used as an electronic vector and can be used for accelerating enzyme-catalyzed reaction of dyestuff de-coloring in an anaerobic process, so that the aim of efficiently de-coloring is realized; in an aerobic treatment process, the COD and the SS in the wastewater are further removed, so that output water reaches first-grade emission standards. An embodiment result shows that the method provided by the invention is used for treating the dyestuff wastewater; the COD content in the output water is less than 100mg/L, the chroma is less than 20 times and the content of the suspended solids (SS) is 0.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for dye wastewater. Background technique [0002] Dyes are widely used in dyeing, coatings, pigments and textiles, and are a major cause of water pollution. The chemical structure of dyes is complex, biologically toxic and difficult to degrade by traditional methods. The amount of wastewater in printing and dyeing factories is relatively large, and 1 ton of textiles for printing and dyeing consumes 100 to 200 tons of water, of which 80% to 90% are discharged as wastewater. Dye-containing wastewater generally has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. [0003] Domestic printing and dyeing wastewater is mainly treated with biological treatment, especially aerobic biological treatment method acc...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34C02F101/30
CPCC02F3/1268C02F3/2853C02F3/301C02F3/342C02F2101/308B01D63/02B01D71/82B01D69/02B01D2325/20B01D71/36
Inventor 严滨
Owner XIAMEN UNIV OF TECH
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