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Device and method for coupling efficient biological treatment and sludge reduction of trademark fabric production wastewater

A technology for production wastewater and biological treatment, which is applied in the field of environmental protection and can solve the problems of large dosage of chemicals, difficulty in meeting discharge standards, and low treatment efficiency.

Pending Publication Date: 2021-08-20
HUZHOU SINY LABEL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high concentration of organic matter in wastewater and the presence of refractory organic matter, chemical methods such as coagulation sedimentation and advanced oxidation are generally used for treatment, which has the problems of large dosage of chemicals, high sludge output, and high cost of sewage treatment.
Biological treatment has the characteristics of low cost and wide application range of water quality. It is the mainstream process of sewage treatment. However, when dealing with refractory organic wastewater, there are problems of low treatment efficiency and difficulty in meeting discharge standards.

Method used

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  • Device and method for coupling efficient biological treatment and sludge reduction of trademark fabric production wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for high-efficiency biological treatment of wastewater from trademark fabric production coupled with sludge reduction, comprising the following steps:

[0032] (1) A trademark cloth production enterprise produces 450 t / d of finishing waste water during the production process, with a COD of about 4000 mg / L and a pH of 12, and produces 400 t / d of coating waste water with a COD of about 2700 mg / L , pH 6.8, total antimony concentration 2 mg / L. Such as figure 1 As shown, the finishing wastewater and coating wastewater are fully mixed in the neutralization tank. The COD of the effluent from the neutralization tank is about 3388 mg / L, and the pH is 10.5. Waste water is discharged into the regulating tank, and FeCl is added to the influent water of the regulating tank every day2 800 kg, or 0.94 kg FeCl 2 / t waste water, the pH of the waste water drops to 9.2. The effective pool volumes of the neutralization pool, regulating pool, and aerobic pool are respectively 8...

Embodiment 2

[0038] A method for high-efficiency biological treatment of wastewater from trademark fabric production coupled with sludge reduction, comprising the following steps:

[0039] A trademark fabric manufacturer discharges 350 tons of coating wastewater and 300 tons of finishing wastewater every day. Such as figure 1 As shown, the COD concentration of the two types of wastewater mixed in the neutralization tank is 4300 mg / L, the pH is 11, and FeCl is added to the water in the adjustment tank 2 650t / d, that is, the dosage is 1.0 kg FeCl 2 / t waste water, the pH of the waste water drops to 9.0. The hydraulic retention times of the neutralization tank, regulating tank and facultative tank are 20 h, 30 h and 40 h, respectively. The pH of the wastewater at the outlet of the adjustment tank is 8.0. 45% of the sludge in the first-stage sedimentation tank is returned to the adjustment tank, 20% is returned to the facultative tank, and 35% is discharged to the sludge thickening tank. ...

Embodiment 3

[0041] use as figure 1 The processing device for biological treatment, the method of high-efficiency biological treatment of waste water from trademark fabric production coupled with sludge reduction, which includes the following steps: Step 1): the finishing waste water and the coating waste water are reacted in the neutralization tank, the adjustment tank and the facultative tank, Then enter the first-level sedimentation tank for sedimentation, and add an appropriate amount of FeCl to the water in the adjustment tank 2 ; Step 2): Part of the sludge in the first-stage sedimentation tank is returned to the regulating tank, part of it is returned to the facultative tank, and a small part is discharged into the sludge thickening tank, and the sludge is dehydrated and then transported for disposal; Step 3): the The effluent from the first-level sedimentation tank is discharged into the aerobic tank. The aerobic tank adopts the operation mode of combining aeration and static sedim...

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Abstract

The invention discloses a device and a method for coupling efficient biological treatment and sludge reduction of trademark fabric production wastewater. The device comprises a neutralization tank, an adjusting tank connected with an outlet of the neutralization tank, a facultative tank connected with an outlet of the adjusting tank, a first-stage sedimentation tank connected with an outlet of the facultative tank, an aerobic tank connected with an outlet of the first-stage sedimentation tank, and a second-stage sedimentation tank connected with an outlet of the aerobic tank, and an outlet of the first-stage sedimentation tank and an outlet of the second-stage sedimentation tank are respectively connected with an inlet of the adjusting tank. According to the method disclosed by the invention, FeCl2 is added into inlet water of the adjusting tank, so that the pH of the alkaline wastewater is reduced, trace elements for growth of activated sludge microorganisms are provided, the activity of the microorganisms and the flocculation precipitability of the sludge are improved, and the biodegradation efficiency of the wastewater and the adsorption removal of antimony are improved. According to the method, the biological treatment efficiency of the wastewater can be improved while sludge reduction is realized, the operation is simple, the cost is relatively low, and engineering is easy.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for high-efficiency biological treatment of wastewater produced by trademark fabrics coupled with sludge reduction. Background technique [0002] Label fabric production belongs to one of the subdivided fields of the textile printing and dyeing industry. It mainly produces coated and uncoated label fabrics for printing labels. The types of products include ordinary ribbons, dyed label belts, coated belts, polyester belts, and cotton belts. , non-woven belts, etc., are widely used in clothing, shoes and hats, bags, toys, bedding, travel products, gift packaging and other fields that require trademarks. The production of trademarked fabrics mainly includes spinning, warping, bleaching and dyeing, setting, coating, calendering and other processes. The wastewater generated not only contains pollutants such as dyes and pastes contained in conventi...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/20C02F101/30C02F103/30
CPCC02F9/00C02F2103/30C02F2001/007C02F3/30C02F2301/043C02F2303/06C02F1/66C02F2305/06C02F2101/20C02F2101/30C02F1/281C02F3/006
Inventor 吴丹丹吴翔强洪彦
Owner HUZHOU SINY LABEL MATERIAL
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