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A kind of treatment method of dye wastewater

A dye wastewater, treatment method technology, applied in textile industry wastewater treatment, water/sewage treatment, special compound water treatment, etc. Stabilization, organic load reduction and toxicity suppression effects

Inactive Publication Date: 2018-01-30
胡恩宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Harm human health, seriously damage water, soil and ecological environment, causing unimaginable consequences

Method used

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  • A kind of treatment method of dye wastewater
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Embodiment 1

[0043] A printing and dyeing factory mainly processes dyeing and finishing treatment of cotton, hemp, and chemical fibers. The high-concentration wastewater generated mainly comes from desizing wastewater, scouring wastewater, dyeing wastewater, and printing wastewater. The types of dyes are complex, and the COD concentration, color high degree. The water quality indicators are shown in Table 1. Adopt processing method of the present invention to process, operate as follows:

[0044] Dye wastewater enters the flocculation tank, FeCl 3 The addition amount is 35mg / g (COD cr ), FeCl 3, Diatomaceous earth and lime are added in a mass ratio of 15:3:1, stirring and reacting for 5-15 minutes before precipitation. Add sulfuric acid to the supernatant to adjust the pH to 6 and then enter the UASB anaerobic reaction tank for a residence time of 6 hours. The pool effluent enters the CASS reaction pool, the residence time is 8 hours, and the dissolved oxygen concentration is 4-6mg / L....

Embodiment 2

[0048] A printing and dyeing factory mainly processes the dyeing and finishing treatment of cotton, hemp, chemical fibers, etc. The comprehensive wastewater generated mainly comes from desizing wastewater, cooking wastewater, dyeing wastewater, printing wastewater, bleaching wastewater and other processes. High degree. The water quality indicators are shown in Table 2. Adopt processing method of the present invention to process, operate as follows:

[0049] Dye wastewater enters the flocculation tank, FeCl 3 The addition amount is 15mg / g (COD cr ), FeCl 3 , Diatomaceous earth and lime are added in a mass ratio of 10::2:0.5, stirring and reacting for 5-15 minutes before precipitation. Add sodium hydroxide to the supernatant to adjust the pH to 7, then enter the IC anaerobic reaction tank, the residence time is 6 hours, the effluent from the anaerobic tank enters the hydrolysis acidification tank, the residence time is 18 hours, the concentration of dissolved oxygen is 0.2-0...

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Abstract

The invention provides a dye wastewater treatment method, which is used for treating high-concentration dye wastewater or dyeing and finishing integrated wastewater through the steps o f pretreatment, biological treatment, homogeneous adjusting, deep treatment, final sedimentation and drainage and the like. The method is wide in concentration and chromaticity ranges of applicable organic matters, high in organic matter degradation rate, and high in decolorization rate, and the water quality of treated dye wastewater is stable, and meets the requirements of Discharge Standards of Water Pollutants for Dyeing and Finishing of Textile Industry (GB 4287-1992).

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a treatment method for dye wastewater. Background technique [0002] The dye industry is a high energy consumption and high pollution industry. According to estimates, for every 1 ton of dye produced in my country, about 744m of wastewater is discharged. 3 , about 10-20% of dyes are released into water during production and use. The basic raw materials for dye production are benzene series, naphthalene series, anthraquinone, aniline and benzidine compounds, and most of them are mixed with metals in the production process. , salts and other substances chelated, most of the dyes are toxic and refractory organic substances, with strong chemical stability, carcinogenic, teratogenic, and mutagenic effects, resulting in dye wastewater becoming one of the most difficult industrial wastewater to treat. It is characterized by high alkalinity, high content of organic pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/32C02F1/5236C02F1/725C02F3/02C02F3/28C02F9/00C02F2103/30C02F2305/10
Inventor 胡恩宁
Owner 胡恩宁