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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 water/sewage treatment, biological water/sewage treatment, neutralized water/sewage treatment, etc. Significant economic and environmental benefits, avoid inhibition, improve efficiency

Inactive Publication Date: 2017-04-26
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 5700mg / L, BOD 5 1150mg / L, chroma 330, aniline 24mg / L, T-N 108mg / 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, 3h, 25°C, CO 2 Pressure 0.1MPa), 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 38mg / L, BOD 5 4mg / L, chromaticity 8, T-N 13mg / L, no aniline detected.

Embodiment 2

[0008] Embodiment 2: 60m is processed every day 3 Printing and dyeing wastewater (pH11, COD Cr 7000mg / L, BOD 5 1450mg / L, chroma 410, aniline 30mg / L, T-N96mg / 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, 1h, 40°C, CO 2 Pressure 0.3MPa), 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 44mg / L, BOD 5 7mg / L, chroma 12, T-N 16mg / L, no aniline detected.

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PUM

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Abstract

The invention discloses a treatment method for printing and dyeing wastewater. The treatment method for the printing and dyeing wastewater comprises the working procedures such as CO2 neutralization, pressurization and iron-aluminum-manganese composite powder reduction, hydrolytic acidification, aerobic treatment and biological filtration tower treatment. Treated wastewater can stably achieve standardized discharge.

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 龙炳清胡德军唐勇
Owner SICHUAN NORMAL UNIVERSITY
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