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Method for treating dye wastewater by using modified fly ash

A dye wastewater and fly ash technology, applied in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., can solve problems such as environmental pollution, high toxicity of dye components, and human hazards

Active Publication Date: 2020-10-23
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The dye wastewater pollutes the water body and destroys the self-purification function of the water body. The dye components are highly toxic and have the risk of carcinogenicity. There are also biological substances such as chromium, lead, mercury, and arsenic in the dye wastewater. The degraded heavy metal salts pass through the food chain and accumulate in the human body, causing serious harm to the human body
[0005] Fly ash is a kind of granular solid waste discharged from coal-fired power plants. It occupies a large amount of land and causes serious environmental pollution. Currently There are also some studies on the treatment of dye wastewater with fly ash, but only using fly ash to directly treat dye wastewater is to use it to absorb organic matter in wastewater, and the treatment is not comprehensive and the efficiency is low.

Method used

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  • Method for treating dye wastewater by using modified fly ash
  • Method for treating dye wastewater by using modified fly ash
  • Method for treating dye wastewater by using modified fly ash

Examples

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Effect test

Embodiment 1

[0029] A method of utilizing modified fly ash to treat dye wastewater, comprising the following steps:

[0030] S1, fly ash modification: take 30g of fly ash, 10g of corn straw biochar, 10g of wheat straw biochar, 20g of sludge activated carbon, and 35g of calcium oxide, mix and roast at 600°C for 4h to obtain a fly ash mixture. Then add 210ml of hydrochloric acid with a mass fraction of 40% to wet the fly ash mixture and stir for 30 minutes to obtain modified fly ash;

[0031] The preparation process of the sludge activated carbon is as follows: take sludge from an urban sewage plant, add 4mol / L zinc chloride solution, stir for 3 hours, and then roast at 500°C for 2 hours to obtain sludge activated carbon;

[0032] The consumption ratio of described urban sewage plant sludge and described zinc chloride solution is 1g: 3ml;

[0033] S2. Preparation of white rot fungus mycelium dry powder: activate the white rot fungus strain, inoculate it in a white rot fungal culture medium ...

Embodiment 2

[0038] A method of utilizing modified fly ash to treat dye wastewater, comprising the following steps:

[0039] S1, Fly ash modification: take 30g of fly ash, 10g of corn straw biochar, 10g of wheat straw biochar, 20g of sludge activated carbon, and 30g of calcium oxide, mix and roast at 500°C for 2h to obtain a fly ash mixture. Then add 100ml of hydrochloric acid with a mass fraction of 30% to wet the fly ash mixture and stir for 20 minutes to obtain modified fly ash;

[0040] The preparation process of the sludge activated carbon is as follows: take sludge from an urban sewage plant, add 5mol / L zinc chloride solution, stir for 2.5 hours, and then roast at 550°C for 1 hour to obtain sludge activated carbon;

[0041] The consumption ratio of described urban sewage plant sludge and described zinc chloride solution is 1g:2ml;

[0042] S2. Preparation of white rot fungus mycelium dry powder: activate the white rot fungus strain, inoculate it in the white rot fungus culture mediu...

Embodiment 3

[0047] A method of utilizing modified fly ash to treat dye wastewater, comprising the following steps:

[0048]S1, Fly ash modification: Take 30g of fly ash, 10g of corn straw biochar, 10g of wheat straw biochar, 20g of sludge activated carbon, and 40g of calcium oxide, mix and roast at 750°C for 6h to obtain a fly ash mixture. Then add 330ml of hydrochloric acid with a mass fraction of 50% to wet the fly ash mixture and stir for 40min to obtain modified fly ash;

[0049] The preparation process of the sludge activated carbon is as follows: take sludge from an urban sewage plant, add 5mol / L zinc chloride solution, stir for 3.5 hours, and then roast at 600°C for 3 hours to obtain sludge activated carbon;

[0050] The consumption ratio of described urban sewage plant sludge and described zinc chloride solution is 1g: 4ml;

[0051] S2. Preparation of white rot fungus mycelium dry powder: activate the white rot fungus strain, inoculate it in a white rot fungus culture medium for ...

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Abstract

The invention relates to the field of dye wastewater treatment methods, and particularly discloses a method for treating dye wastewater by using modified fly ash, which specifically comprises fly ashmodification, white-rot fungus mycelium dry powder preparation and dye wastewater treatment. According to the method, the dye wastewater is treated by combining fly ash modification with white-rot fungi, so that various pollutants and harmful substances in the dye wastewater are greatly reduced, and efficient treatment of the dye wastewater is realized.

Description

technical field [0001] The invention relates to the field of dye wastewater treatment methods, in particular to a method for treating dye wastewater by using modified fly ash. Background technique [0002] The development of social economy has led to the development of the chemical industry. In the process of the development of the chemical industry, industrial wastewater is inevitably produced. Among them, dye wastewater is one of the most harmful wastewater in chemical wastewater; my country is a big dye country, and the output of dyes accounts for the world People's lives are inseparable from the dye industry. In order to meet people's needs for color and dyeing quality, there are more and more types of dyes, and they are moving in the direction of anti-photolysis, anti-oxidation, and anti-biodegradation. The development of dyes has made dye wastewater more and more difficult to treat, and the wastewater produced by the dye industry has posed a serious threat to the main wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/38C02F101/20
CPCC02F1/281C02F3/348C02F2209/08C02F2209/10C02F2101/20C02F2101/38C02F2101/308
Inventor 惠远锋辛丙靖刘伟樊雪
Owner JILIN INST OF CHEM TECH
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