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A kind of cotton fabric printing and dyeing wastewater treatment method

A technology of printing and dyeing wastewater and treatment method, which is applied in the direction of textile industry wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. Biochemical feasibility, ensuring stable emission standards, and improving the effect of reaction efficiency

Active Publication Date: 2018-11-30
SHANDONG GAOMIAN INTELLIGENT FIBER DYEING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the electrolysis process, as the reaction proceeds, the electrodes will be continuously consumed. This method will produce a large amount of iron sludge, which increases the cost of wastewater treatment, and there are problems such as difficult control of the process and cumbersome operation.

Method used

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  • A kind of cotton fabric printing and dyeing wastewater treatment method
  • A kind of cotton fabric printing and dyeing wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In the electrochemical oxidation system, a boron-doped diamond electrode is used as the anode, and ordinary stainless steel is used as the cathode. Take 2L of cotton fabric printing and dyeing wastewater to adjust the pH value to 9, pump it into the electrochemical oxidation system, turn on the DC power supply, and set the current density to 200A / m 2 , turn on the circulation pump, and carry out the electrochemical oxidation reaction, and the reaction time is 3 hours. After the reaction was completed, it was measured that the COD in the water decreased from 3000mg / L to 910mg / L, the chromaticity decreased from 1200 times to 280 times, and the B / C increased from 0.1 to 0.34.

[0033] The electrochemically oxidized wastewater is continuously pumped into the carbon-loaded biological fluidization system for biodegradation. Among them, the activated carbon in the carbon-loaded biological fluidization system is shell carbon, and its content is maintained at about 450mg / L, the...

Embodiment 2

[0035]In the electrochemical oxidation system, a titanium-plated tin dioxide electrode is used as the anode, and 316L stainless steel is used as the cathode. Take 2L of cotton fabric printing and dyeing wastewater and adjust the pH value to 10, pump it into the electrochemical oxidation system, turn on the DC power supply, set the current density to 300A / m2, turn on the circulation pump, and carry out the electrochemical oxidation reaction for 2 hours. After the reaction was completed, it was measured that the COD in the water decreased from 3000mg / L to 800mg / L, the chromaticity decreased from 1200 times to 260 times, and the B / C increased from 0.1 to 0.36.

[0036] The electrochemically oxidized wastewater is continuously pumped into the carbon-loaded biological fluidization system for biodegradation. Among them, the activated carbon in the carbon-loaded biological fluidization system is shell carbon, and its content is maintained at about 350mg / L, the reaction temperature is...

Embodiment 3

[0038] In the electrochemical oxidation system, a titanium electrode plated with tin dioxide is used as the anode, and ordinary stainless steel is used as the cathode. Take 2L of cotton fabric printing and dyeing wastewater and adjust the pH value to 8, pump it into the electrochemical oxidation system, turn on the DC power supply, set the current density to 350A / m2, turn on the circulation pump, and carry out the electrochemical oxidation reaction for 2 hours. After the reaction was completed, it was measured that the COD in the water decreased from 3000mg / L to 690mg / L, the chromaticity decreased from 1200 times to 220 times, and the B / C increased from 0.1 to 0.4.

[0039] The electrochemically oxidized wastewater is continuously pumped into the carbon-loaded biological fluidization system for biodegradation. Among them, the activated carbon in the carbon-loaded biological fluidization system is coal-based carbon, and its content is maintained at about 300mg / L, the reaction t...

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Abstract

The invention relates to a treatment method of cotton fabric printing and dyeing wastewater. The treatment method comprises the following steps of (1) using an electrochemical oxidizing method to improve the biochemical feasibility of wastewater; pumping the cotton fabric printing and dyeing wastewater into an electrochemical oxidizing system, engaging a direct current power source, starting a circulating pump to perform electrochemical oxidizing reaction, oxidizing the degradation-resistant matters in the wastewater into small molecular easily-biodegradable matters, improving the biochemical feasibility of the wastewater, and damaging the color groups in the organic matters; (2) adopting a carbon-supported biological fluidizing method to further decrease the COD (chemical oxygen demand) and color of the wastewater, pumping the cotton fabric printing and dyeing wastewater after electrochemical oxidizing into a carbon-supported biological fluidizing system, adopting a solid, liquid and gas full-mixing type, and further decreasing the COD and color of the wastewater through three-phase fluidizing, adsorbing of active carbon, and degrading of biological flora. The method has the advantages that after treating, the color removal rate of the cotton fabric printing and dyeing wastewater is more than 90%; the COD removal rate is more than 95%; the wastewater can be stably drained by meeting the standard requirements.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment in the printing and dyeing industry, and in particular relates to a method for treating cotton fabric printing and dyeing wastewater. Background technique [0002] Cotton fabric printing and dyeing wastewater refers to the general term for all wastewater generated from cotton textiles in gray cloth, singeing, desizing, scouring, bleaching, mercerizing, dyeing, printing and other processes, mainly including desizing wastewater, scouring wastewater, bleaching wastewater, Mercerizing wastewater, dyeing wastewater, etc. The wastewater has the characteristics of complex composition, deep color, high chemical demand (COD), high toxicity, and difficult biodegradation. Due to the complexity of the production process and the characteristics of the waste water, it is difficult to treat the waste water. It is difficult to meet the discharge standard by a single treatment method, and a combinatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/4672C02F1/66C02F3/02C02F9/00C02F2103/30
Inventor 高潮曹静
Owner SHANDONG GAOMIAN INTELLIGENT FIBER DYEING TECH CO LTD
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