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Treatment method for printing and dyeing wastewater

A technology for printing and dyeing wastewater and treatment methods, which is applied in textile industry wastewater treatment, water/sewage treatment, biological water/sewage treatment, etc. It can solve problems such as difficult to meet the standard discharge, affect the effect of wastewater, and the effect is unstable, and achieve obvious economical results. Benefits and environmental benefits, avoidance of inhibitions, effects of increased efficiency

Inactive Publication Date: 2017-04-26
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), manganese powder reduction (add manganese 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 72mg / L, BOD 5 10mg / L, chroma 13, T-N 14mg / L, no aniline 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), manganese powder reduction (add manganese 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 80mg / L, BOD 5 11mg / L, chroma 17, T-N 18mg / L, no aniline was detected.

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PUM

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Abstract

The invention provides a treatment method for printing and dyeing wastewater. The treatment method comprises treatment procedures of neutralizing by CO2, pressurizing manganese powder under the action of ultrasonic wave and reducing, carrying out hydrolytic acidification, carrying out aerobic treatment, treating by a biological filtration tower and the like. The treated wastewater can be discharged after stably reaching standards.

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): C02F9/14C02F103/30C02F101/30C02F101/16
CPCC02F1/66C02F1/705C02F3/30C02F3/34C02F9/00C02F2101/105C02F2101/16C02F2101/30C02F2103/30
Inventor 龙炳清龚婕王杰才
Owner SICHUAN NORMAL UNIVERSITY
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