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Printing and dyeing wastewater treatment method

A technology for printing and dyeing wastewater and its treatment method, which is applied in the textile industry wastewater treatment, water/sewage treatment, natural water treatment and other directions, can solve the problems of difficulty in stably reaching the standard discharge, affecting the effect of wastewater, and high treatment costs, achieving obvious economic benefits and environmental protection. Benefit, Avoiding Inhibitory Effects, Mitigating Pollution Effects

Inactive Publication Date: 2017-05-17
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These treatment methods have high treatment costs, unstable effects, and are difficult to meet the discharge standards stably.
Due to the addition of sulfuric acid in the biochemical method, a large amount of H is produced in the process of anaerobic or hydrolytic acidification 2 S, causing serious secondary pollution, in addition, due to a large amount of SO 4 2- The existence of inhibiting the growth of microorganisms seriously affects the effect of wastewater biochemical treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Treat 1m per day 3 Printing and dyeing wastewater (pH10.7, COD Cr 5600mg / L, BOD 5 1100mg / L, chroma 320, aniline 24mg / L, T-N98mg / L), after CO 2 Adjust pH (6.5), iron powder reduction (add iron powder 5g per liter of wastewater, 8min, 40°C, CO 2 Pressure 0.1MPa per cubic meter of wastewater input ultrasonic power is 4kW), hydrolytic acidification (4h), aerobic biochemical (4h) and activated carbon biological filter tower (hydraulic load is 100m 3 / m 2 .d. The total thickness of activated carbon is 1m), and the effluent quality is COD Cr 50mg / L, BOD 5 8mg / L, chromaticity 8, T-N9mg / L, aniline was not detected.

Embodiment 2

[0008] Embodiment 2: 60m is processed every day 3 Printing and dyeing wastewater (pH10.5, COD Cr 6300mg / L, BOD 5 1250mg / L, chroma 330, aniline 28mg / L, T-N 102mg / L), CO 2 Adjust pH (6.8), iron powder reduction (add iron powder 10g per liter of wastewater, 15min, 25°C, CO 2 Pressure 0.3MPa, input ultrasonic power per cubic meter of wastewater is 2kW), hydrolytic acidification (6h), aerobic biochemical (6h) and porous ceramsite biological filter tower (hydraulic load is 150m 3 / m 2 .d. The total thickness of porous ceramsite is 2m), and the effluent quality is COD Cr 57mg / L, BOD 5 9mg / L, chroma 7, T-N 10mg / L, no aniline detected.

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PUM

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Abstract

The invention discloses a printing and dyeing wastewater treatment method which includes the treatment processes of CO2 neutralization, pressurized iron powder reduction under the action of ultrasonic waves, hydrolytic acidification, aerobiotic and biological filtration tower treatment and the like. Treated wastewater can be stably discharged in an up-to-standard manner.

Description

technical field [0001] The invention relates to a treatment method for printing and dyeing wastewater. Background technique [0002] Printing and dyeing is an important process in the textile industry. Printing and dyeing can increase the color of textiles and improve the quality of human life. In the printing and dyeing process, printing and dyeing wastewater will inevitably be produced, and the COD of the wastewater Cr The concentration is high, the chroma is large, and the alkalinity is high. If it is directly discharged into the environment, it will cause serious pollution to the environment. At present, the treatment methods of printing and dyeing wastewater mainly include biochemical treatment methods, physical chemical methods and chemical treatment methods. These treatment methods have high treatment costs and unstable effects, making it difficult to meet the discharge standards stably. Due to the addition of sulfuric acid in the biochemical method, a large amoun...

Claims

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Application Information

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IPC IPC(8): C02F9/14B01D53/78B01D53/62C02F103/30C02F103/38C02F101/30
CPCB01D53/62B01D53/78C02F1/36C02F1/66C02F1/705C02F3/02C02F3/28C02F3/34C02F9/00C02F2001/007C02F2101/308C02F2101/38C02F2103/30C02F2209/08C02F2209/16Y02C20/40
Inventor 龙炳清匡茜熹陈亚平
Owner SICHUAN NORMAL UNIVERSITY
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