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Recycling and processing method for printing and dyeing wastewater

A treatment method and technology for printing and dyeing wastewater, which is applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of increased difficulty in industrial wastewater treatment, short service life, membrane pollution and ventilation Rapid decline in volume and other issues, to achieve the effect of solving in-depth processing problems, economical methods, and easy large-scale promotion

Active Publication Date: 2013-09-18
HUBEI JUNJI WATER TREATMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the existing ultrafiltration membrane and reverse osmosis membrane technologies are advanced, they have the disadvantages of increased difficulty in the treatment of highly polluted industrial wastewater, rapid membrane fouling and flux decline, short service life and high cost.

Method used

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Experimental program
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Embodiment Construction

[0022] The following is a 9000m of the present invention 3 / d Printing and dyeing wastewater separation treatment and reuse engineering case:

[0023] A printing and dyeing textile sewage treatment plant, including the first phase sewage treatment system (5000m 3 / d) and the second phase of reclaimed water treatment system (4000m 3 / d).

[0024] 1 Jacquard wastewater and concentrated water treatment system

[0025] 1500m 3 Acid waste water from acid wax workshop / d, Jacquard workshop 2500m 3 / d Alkaline waste water, film-containing concentrated water and flushing water of reclaimed water system 1000m 3 / d, three streams of waste water are pumped to the concentrated water collection tank for stirring and mixing. Add 1-3kg / t of ferrous sulfate to waste water, add acid to control the pH value to 10, form ferrous hydroxide precipitate, and add 2g / t of waste water to dissolve and flocculate with polyacrylamide. After the muddy water is separated in the sedimentation tank...

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PUM

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Abstract

The invention relates to a recycling and processing method for printing and dyeing wastewater, which comprises the following steps of: mixing, neutralizing and coagulating the wastewater of acid wax and jacquard workshops and then performing biochemical treatment, so as to discharge the wastewater reaching the required standards; processing the wastewater of blanching and coloring workshop by the processes of adjusting, coagulating, hydrolytic-acidification, contact-oxidization, coagulation and chemical adding processes, so as to discharge the wastewater reaching the required standards; and then producing recycled water by adopting active carbon adsorption and then using ultra-filtration membrane and reverse osmosis membrane. The recycle water recovering rate of the recycled water treatment system is greater than 50%, the water quality index is better than that of tap water, and the influence to the printing and dyeing is avoided.

Description

technical field [0001] The invention relates to a recycling treatment method for printing and dyeing wastewater, which belongs to the technical field of environmental protection. Background technique [0002] Printing and dyeing wastewater is one of the main industrial wastewater in my country. It has the characteristics of large water volume, high chroma, and complex composition, which causes serious pollution to the environment. According to its source, printing and dyeing wastewater mainly includes the wastewater produced in the process of dyeing, milling and wool scouring in wool spinning mills with lanolin, acid dyes and auxiliaries as the main pollutants. , mercerizing, dyeing and printing wastewater with pulp, dyes, auxiliaries, fiber wax and pectin as pollutants, ramie gum and dyes in the process of degumming, dyeing and finishing in ramie textile printing and dyeing factories Wastewater with sericin, dyes and auxiliaries as the main pollutants in silk textile m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/30
Inventor 许榕刘鲁建董俊聂忠文刘松张芙蓉
Owner HUBEI JUNJI WATER TREATMENT
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