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Toxicity reduction and recycling system and treatment method for biotreated effluent in printing and dyeing industry

A tail water and biochemical technology, applied in the direction of biological water/sewage treatment, water/sewage treatment, water treatment parameter control, etc., can solve the problems of high operating cost and inability to reduce biological toxicity, achieve low operating cost, and realize comprehensive biological Toxicity, toxicity-reducing effects

Active Publication Date: 2017-01-25
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems that the existing printing and dyeing wastewater treatment methods cannot reduce biological toxicity and high operating costs, the present invention provides a biochemical tail water toxicity reduction and reuse system and treatment method in the printing and dyeing industry, which will be based on magnetic resin reactors. Adsorption unit and ecological Units and filtration units are combined to form an integrated water treatment system to achieve advanced treatment of printing and dyeing wastewater to meet the US EPA wastewater biotoxicity discharge standard

Method used

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  • Toxicity reduction and recycling system and treatment method for biotreated effluent in printing and dyeing industry
  • Toxicity reduction and recycling system and treatment method for biotreated effluent in printing and dyeing industry
  • Toxicity reduction and recycling system and treatment method for biotreated effluent in printing and dyeing industry

Examples

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Effect test

Embodiment 1

[0038] The wastewater treatment scale of a printing and dyeing textile park is 6,000 tons / day. After the traditional biochemical process, the concentration of COD in the effluent is 80-100mg / L, the concentration of ammonia nitrogen is 3-5mg / L, the concentration of total nitrogen is 1.0-5.0mg / L, and the concentration of total phosphorus is 0.3 -1.0mg / L, such as figure 1 As shown, a biochemical tail water toxicity reduction and reuse system in the printing and dyeing industry is used for advanced treatment of wastewater. The treatment devices used include V-shaped filters (2 sets, length 5.5 meters × width 3.5 meters × height 4.0 meters), Intermediate pool (1, length 11.0m x width 5.5m x height 4.0m), magnetic resin reactor (1, diameter 5.0m x height 8.0m), anaerobic pond (1, length 295m x width 72m × 5 meters high), surface flow wetlands (2, length 180 meters × width 85 meters × height 1.5 meters) and ecological ponds (1 building, length 120 meters × width 60 meters × height 2 ...

Embodiment 2

[0049] A textile printing and dyeing park produces 3,000 tons of sewage per day. After traditional biochemical treatment, the effluent COD concentration is 95-140mg / L, ammonia nitrogen concentration is 2-4mg / L, total nitrogen concentration is 5-10mg / L, and total phosphorus concentration is 0.5-1.5 mg / L. The treatment method steps are basically the same as in Example 1, the difference is that the resin reactor adopted is a hydraulic circulation stirring mode (the magnetic resin reactor provided in Example 1 of Chinese Invention Patent No. ZL201110127627.X), The hydraulic retention time is 40 minutes, and the annual ratio of resin dosage to treated water is 1:300. The treatment devices used include V-shaped filters (2, 4.0 m long x 2.8 m wide x 3.5 m high), an intermediate pool (1, 6.0 m long x 3.5 m wide x 4.0 m high), a magnetic resin reactor ( 1 building, 3.5 meters long × 3.5 meters wide × 7.0 meters high), anaerobic pond (1 building, 208 meters long × 50 meters wide × 5 me...

Embodiment 3

[0051] The daily sewage production of a textile printing and dyeing park is 5,000 tons. After traditional biochemical treatment, the effluent COD concentration is 75-100mg / L, ammonia nitrogen concentration is 2-5mg / L, total nitrogen concentration is 1.0-4.5mg / L, and total phosphorus concentration is 0.5- 1.0mg / L. The steps of the treatment method are basically the same as in Example 1, except that the hydraulic retention time of the resin reactor is 30 minutes, and the ratio of resin dosage to treated water is 1:300. The treatment device used includes a V-shaped filter (1 set, 7.5 meters long × 4.0 meters wide × 4.5 meters high), an intermediate pool (1 set, 10.0 meters long × 4.5 meters wide × 4.5 meters high), a magnetic resin reactor ( 1 building, diameter 6.0 meters x height 6.0 meters), anaerobic pond (1 building, length 252 meters x width 68 meters x height 4.5 meters), surface flow wetland (3 buildings, length 150 meters x width 46 meters x height 2.0 meters ) and ecol...

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Abstract

The invention discloses a toxicity reduction and recycling system and a treatment method for biotreated effluent in the printing and dyeing industry, and belongs to the technical field of deep treatment of printing and dyeing wastewater. The system comprises a V-shaped filtering pond, a middle water pond, a magnetic resin reactor, an anaerobic pond, a surface flow wetland and an ecological pond, wherein the magnetic resin reactor is reasonably combined with ecosystems such as the ecological pond and a constructed wetland; the filtering pond is used for removing suspended organic matters in the biotreated effluent by filtering in order to lower turbidity; magnetic resin is used for adsorbing soluble organic pollutants in the biotreated effluent in order to lower chromaticity and biological toxicity. An alternative anaerobic-aerobic process is formed by a pond-wetland-pond combination to further lower the concentration of organic matters, nitrogen, phosphorus and toxic pollutants in a water body in order to form a set of biotreated effluent recycling method which runs stably, makes effluent be up to surface water IV and US EPA (Environmental Protection Agency) wastewater biological toxicity standards, has a landscape function and is suitable for printing and dyeing textile zones.

Description

technical field [0001] The invention belongs to the technical field of advanced treatment of printing and dyeing wastewater, and more specifically relates to a toxicity reduction and reuse system and treatment method of biochemical tail water in the printing and dyeing industry. Background technique [0002] Printing and dyeing wastewater has low biodegradability and high biological toxicity due to large water volume, high concentration of organic pollutants (PVA slurry, rayon alkali hydrolyzate, new additives, etc.), deep color, high alkalinity, and large water quality changes. It is recognized as one of the more difficult industrial wastewater. [0003] At present, the advanced treatment technologies for printing and dyeing wastewater mainly include physical methods, chemical methods and biological methods, but a single treatment process has its own defects, and cannot have a good treatment effect on all water quality indicators, and often requires different treatment meth...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F101/16
CPCC02F9/00C02F2101/308C02F2101/105C02F2101/16C02F3/30C02F3/34C02F3/32C02F1/488C02F1/001C02F1/285C02F2303/14C02F2303/16C02F2209/08C02F2209/14C02F2209/16
Inventor 施鹏李冬梅李爱民丁新春双陈冬戴建军李睿华曹勋
Owner NANJING UNIV
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