Printing and dyeing wastewater grading treatment method

A technology for the treatment of printing and dyeing wastewater and its quality, which is applied in the textile industry wastewater treatment, water/sewage treatment, biological water/sewage treatment, etc. The total amount of pollutants discharged, the reduction of treatment costs, and the effect of expanding the scope of application

Inactive Publication Date: 2015-03-04
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If all the wastewater is mixed together, the conventional process can meet the treatment standards, but it is difficult or even impossible to reuse the treated effluent

Method used

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  • Printing and dyeing wastewater grading treatment method
  • Printing and dyeing wastewater grading treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of rare earth catalytic oxidizing agent: adopt the waste residue of 3wt% from the rare earth production plant (mainly cerium oxide, accounting for 70% of mixed rare earth oxides, other light rare earth oxides such as lanthanum oxide and neodymium oxide), in the Add 0.1wt% copper shavings to the waste residue, mix the resulting mixture with silicate in a weight ratio of 1:2, slowly add water in stages to make a non-fluid paste, leave it to solidify for 24 hours, and obtain a mixed rare earth catalyst , the radiation dose at 0.1m is less than 0.3μsv; the mixed rare earth catalyst is dispersed into a particle size of 2-10mm, and the mixed rare earth catalyst with a particle size of 2-10mm, coke with a particle size of 3-10mm and particle size of 3 -15mm pig iron is mixed in a weight ratio of 1:5:100 to obtain a mixed rare earth-iron-carbon catalytic oxidant, and the mixed rare earth-iron-carbon catalytic oxidant is packed in a 60-mesh nylon fiber bag to obta...

Embodiment 2

[0027] The preparation of rare earth catalytic oxidant: adopt the waste residue of 5wt% from the rare earth production plant (mainly cerium oxide, accounting for 70% of mixed rare earth oxides, other light rare earth oxides such as lanthanum oxide and neodymium oxide), in the Add 0.1wt% copper shavings to the waste residue, mix the resulting mixture with silicate in a weight ratio of 1:2, slowly add water in stages to make a non-fluid paste, leave it to solidify for 24 hours, and obtain a mixed rare earth catalyst , the radiation dose at 0.1m is less than 0.3μsv; the mixed rare earth catalyst is dispersed into a particle size of 2-10mm, and the mixed rare earth catalyst with a particle size of 2-10mm, coke with a particle size of 3-10mm and particle size of 3 -15mm pig iron is mixed in a weight ratio of 1:5:100 to obtain a mixed rare earth-iron-carbon catalytic oxidant, and the mixed rare earth-iron-carbon catalytic oxidant is packed in a 200-mesh nylon fiber bag to obtain a ra...

Embodiment 3

[0030] The preparation of rare earth catalytic oxidant: adopt the waste residue of 1wt% from rare earth production plant (mainly cerium oxide, accounting for 70% of mixed rare earth oxides, other light rare earth oxides such as lanthanum oxide and neodymium oxide), in the Add 0.1wt% copper shavings to the waste residue, mix the resulting mixture with silicate in a weight ratio of 1:2, slowly add water in stages to make a non-fluid paste, leave it to solidify for 24 hours, and obtain a mixed rare earth catalyst , the radiation dose at 0.1m is less than 0.3μsv; the mixed rare earth catalyst is dispersed into a particle size of 2-10mm, and the mixed rare earth catalyst with a particle size of 2-10mm, coke with a particle size of 3-10mm and particle size of 3 -15mm pig iron is mixed in a weight ratio of 1:5:100 to obtain a mixed rare earth-iron-carbon catalytic oxidant, and the mixed rare earth-iron-carbon catalytic oxidant is packed in a 200-mesh nylon fiber bag to obtain a rare e...

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Abstract

The invention provides a printing and dyeing wastewater grading treatment method which is characterized by comprising the following steps: independently treating concentrated wastewater of which the COD value is 8000-50000mg/L and the pH value is 13-14 in printing and dyeing wastewater without regulating the pH value, and directly performing rare-earth catalyzed oxidation for 0.5-8 hours under the aeration condition, wherein a rare-earth catalyzed oxidizing agent is added into a rare-earth catalyzed oxidation pool; standing, naturally settling and separating so as to obtain effluent, or adding 0.015-0.030 percent of XSD accelerant, carrying out an aeration reaction for 0.5-2 hours, adding a coagulant for carrying out a coagulation reaction, and separating to obtain the effluent, wherein the COD value is less than or equal to 200mg/L, and the requirement on the discharged centralized sewage treatment plant in the textile dyeing industrial water pollutant discharge standard of GB4287-2013 is met. The fresh wastewater is subjected to rare-earth catalyzed oxidation treatment and is separated for recycling, the textile dyeing industrial recycled water quality standard of FZ/T01107-2011 is met, the reuse rate is 85 percent, and the amount of discharged wastewater and the total amount of discharged pollutants in the printing and dyeing mill are greatly reduced.

Description

technical field [0001] The invention relates to a separate treatment of high-concentration wastewater such as pre-treatment refining and dyeing and dilute wastewater such as washing in the textile printing and dyeing industry. Background technique [0002] my country is the largest textile country in the world, and its output has accounted for 60% of the world. In the textile industry, the printing and dyeing industry is an indispensable intermediate industry with the highest technical content, but it is also an industry with high energy consumption and the largest discharge of pollutants, especially wastewater. , In my country's industrial sectors, water pollution discharge is second only to the paper industry, ranking second, and it is one of the two major industries under the key control of the Ministry of Environmental Protection. Printing and dyeing wastewater is high-concentration organic wastewater, which is difficult to treat. At the same time, because the printing an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F9/04C02F9/14
CPCC02F1/52C02F1/725C02F1/74C02F3/1268C02F9/00C02F2101/308C02F2103/30
Inventor 刘振鸿马春燕奚旦立吴伟江
Owner DONGHUA UNIV
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