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Treatment method of printing and dyeing wastewater

A technology for printing and dyeing wastewater and treatment methods, which is applied in water/sewage treatment, biological water/sewage treatment, neutralized water/sewage treatment, etc. Significant economic and environmental benefits, avoid inhibition, improve efficiency

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 (pH10.8, COD Cr 5800mg / L, BOD 5 1230mg / L, chroma 350, aniline 20mg / L, T-N 103mg / L), after CO 2 Adjust pH (6.5), iron-manganese-zinc composite powder reduction (add 5g of iron-manganese-zinc composite powder 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 44mg / L, BOD 5 6mg / L, chroma 10, T-N 12mg / L, no aniline detected.

Embodiment 2

[0008] Embodiment 2: 60m is processed every day 3 Printing and dyeing wastewater (pH10.3, COD Cr 6600mg / L, BOD 5 1300mg / L, chroma 360, aniline 27mg / L, T-N100mg / L), CO 2 Adjust pH (6.8), iron-manganese-zinc composite powder reduction (add 10g of iron-manganese-zinc composite powder 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 38mg / L, BOD 5 5mg / L, chroma 9, T-N 10mg / L, no aniline detected.

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PUM

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Abstract

The invention provides a treatment method of printing and dyeing wastewater. The method comprises steps of CO2 neutralization, pressurizing reduction of iron and manganese composite powder under ultrasonic action, hydrolytic acidification, aerobic treatment, biofilter treatment and the like, and the treated wastewater can be stably discharged up to the standard.

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): C02F9/14C02F101/32
CPCC02F1/52C02F1/66C02F1/705C02F3/02C02F3/34C02F9/00C02F2101/32C02F2101/322
Inventor 龙炳清曾凡芸刁剑
Owner SICHUAN NORMAL UNIVERSITY