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Printing and dyeing wastewater processing method

A treatment method and technology for printing and dyeing wastewater, which can be applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve problems such as poor biodegradability, high concentration of pollutants, and unsatisfactory effects , to achieve the effect of low treatment cost and less sludge output

Inactive Publication Date: 2013-01-02
KUNSHAN WANFENG GARMENT
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Problems solved by technology

[0003] However, because the printing and dyeing wastewater contains a variety of dye intermediates, a large amount of inorganic raw materials and various water-soluble dyes, the concentration of pollutants is high, the chroma is high, and the biodegradability is poor. When the traditional treatment method is used for treatment, the effect is very unsatisfactory.

Method used

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  • Printing and dyeing wastewater processing method

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Embodiment Construction

[0010] Such as figure 1 Shown, a kind of processing method of printing and dyeing wastewater of the present invention comprises the steps:

[0011] The raw wastewater is passed through the grid, regulating tank, anaerobic tank, iron aeration tank, contact oxidation tank 1, sedimentation tank 1, contact oxidation tank 2, sedimentation tank 2, artificial wetland, and finally discharged. Among them, the sludge generated in the iron aeration tank, contact oxidation tank and sedimentation tank flows back into the anaerobic tank for internal digestion.

[0012] The following is a detailed description of the various processes mentioned above in conjunction with the implementation

[0013] (1) Grille. Before the waste water enters the treatment system, the coarse impurities in the waste water should be separated by grille to protect the treatment facilities from damage and avoid pipeline blockage.

[0014] (2) Regulating pool. Due to the high discharge concentration, complex compo...

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Abstract

The invention provides a printing and dyeing wastewater processing method. The method comprises the following steps: allowing raw wastewater to respectively go through a grating, an adjustment pool, an anaerobic pool, an iron aeration pool, a first contact oxidation pool, a first sedimentation pool, a second contact oxidation pool, a second sedimentation pool and a constructed wetland; and discharging, wherein sludge generated in the iron aeration pool, the contact oxidation pools and the sedimentation pools backflows to the anaerobic pool for internal digestion. The method completely which adopts a biological process and thoroughly discards general physical and chemical processing processes has the advantages of no need of the addition of chemical drugs comprising a coagulant or the like, less sludge output, and low processing cost. The printing and dyeing wastewater processed through the technology completely accords with a discharge requirement.

Description

technical field [0001] The invention relates to environmental protection engineering, in particular to a treatment method for printing and dyeing wastewater Background technique [0002] Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high chroma, high alkalinity, and large changes in water quality. In recent years, due to the development of chemical fiber fabrics, the rise of imitation silk and the progress of printing and dyeing finishing technology, PVA size, rayon alkali hydrolyzate (mainly phthalates), new additives, etc. are difficult to biochemically degrade A large amount of organic matter enters the printing and dyeing wastewater. At present, printing and dyeing wastewater is usually treated by biological-physical and chemical composite methods. The physical and chemical methods are generally coagulation sedimentation or coagulation air flotation, and the biochemical methods are generally hydrolytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/30
Inventor 姚建平
Owner KUNSHAN WANFENG GARMENT
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