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Integrated technology for deep purification treatment for printing and dyeing waste water

A technology for deep purification of printing and dyeing wastewater, applied in textile industry wastewater treatment, flotation water/sewage treatment, oxidized water/sewage treatment, etc.

Inactive Publication Date: 2010-01-27
ZHEJIANG STONE ENVIRONMENTAL ENG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology can not only effectively solve the pollution problem in the printing and dyeing industry and protect the environment, but also provide theoretical and technical support for promoting cleaner production in the printing and dyeing industry

Method used

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  • Integrated technology for deep purification treatment for printing and dyeing waste water
  • Integrated technology for deep purification treatment for printing and dyeing waste water
  • Integrated technology for deep purification treatment for printing and dyeing waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A textile printing and dyeing company has a dyeing and finishing wastewater treatment facility, and the effluent quality meets the secondary discharge standard of the "Discharge Standard of Water Pollutants for Textile Dyeing and Finishing Industry" (GB 4287-1992). In order to reduce the total discharge of COD, improve the water environment in the area, save water resources, and reduce production costs, the company requires advanced treatment of printing and dyeing wastewater and reuse in production. This process is now being used for a pilot test with an influent water volume of 100t / d.

[0021] The following table shows the water quality of the system feed water and the recycling standards applicable to the textile wet treatment requirements of the production workshop.

[0022]

[0023] Three months after the pilot project was officially implemented, the treatment effects of each treatment unit are as follows:

[0024] control index

[0025] The water re...

Embodiment 2

[0027] A company's printing and dyeing wastewater deep purification treatment project, the main source of wastewater is pre-treatment, dyeing and post-treatment in the printing and dyeing process, the treatment capacity is 150t / d, the dyes used are mainly reactive dyes, some are disperse dyes, and the auxiliaries used are alkali and The original starch and so on. The wastewater enters the process system after being treated by the company's internal wastewater station. The following are the relevant indicators of this process:

[0028]

[0029]

[0030] According to the above measured data, all water quality indicators of the project’s effluent have met or exceeded the requirements for reused water, and the effluent has been reused for pre-treatment and dyeing processes in the printing and dyeing process, with about 75% of the reused water used. According to the quality analysis of dyed products, its color fastness and soaping fastness are above grade 4. Therefore, the p...

Embodiment 3

[0032] A Knitting Co., Ltd. is an enterprise mainly engaged in the production of knitted gray fabrics and dyeing and finishing. The wastewater discharged from production contains a large amount of residual dyes, auxiliaries, sizing, waste alkali, fibers and inorganic salts, etc., with high organic content and large chroma. , pH changes greatly. The factory discharges 3000m of waste water every day 3 / d, wastewater CODcr is 1400mg / L, BOD is 200mg / L, SS is 400mg / L, color is 700 times, pH value is 7-9. The plant currently has a set of sewage treatment equipment. The treatment process is coagulation-sedimentation-hydrolytic acidification-aerobic-coagulation-sedimentation-biological filter. The first-level emission standard of the National Waste Emission Standard (GB4287-92). The discharged wastewater is now carried out a pilot test of 120t / d deep purification treatment using this process flow. The following is the relevant data after the process has been running stably for 3 mon...

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Abstract

The invention discloses integrated technology for reclaiming lightly-polluted printing and dyeing waste water or printing and dyeing waste water achieving a certain discharge standard through deep purification treatment for production. A related process of the technology mainly comprises an adjusting tank, a pressure moving bed bio-film reactor, a ceramsite and activated carbon biological filter, an air floating system, a laminated filter and an ultra-filtration and reverse osmosis system. The technology is characterized in that the technology improves the prior biochemical technology, and carries out process integration by combining technology such as ozone oxidation, air flotation, membrane separation and the like. The regeneration of the printing and dyeing waste water can be realized by adopting the treatment technology, and the regenerated water quantity can reach 70 to 80 percent; and the technology not only can effectively solve the pollution problem of the printing and dyeing industry and protect the environment, but also can provide theoretical and technical support for realizing closed-loop circulation of the printing and dyeing waste water and popularizing clean production in the printing and dyeing industry.

Description

technical field [0001] The invention relates to an integrated technology for lightly polluted printing and dyeing wastewater or printing and dyeing wastewater that has been treated to reach a certain discharge standard and then reused for production after deep purification. Background technique [0002] my country is a water-scarce country with per capita fresh water resources of only 2200m 3 , which is 1 / 4 of the world's average level, and the distribution is uneven. Some areas are seriously short of water. Even in the southeast coastal areas where water resources are relatively abundant, water quality-type water shortages are also caused by serious pollution. The printing and dyeing industry is not only a major user of water consumption, but also a major discharge of wastewater. Among all industrial industries in the country, the discharge of textile printing and dyeing wastewater ranks fifth, accounting for 7.5% of the national industrial wastewater statistical discharge,...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/78C02F3/02C02F1/24C02F1/44C02F103/30
CPCY02W10/10
Inventor 陈健波
Owner ZHEJIANG STONE ENVIRONMENTAL ENG CO LTD
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