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Method for removing benzene series compounds from industrial waste water

A technology for industrial wastewater and benzene series, which is applied in textile industrial wastewater treatment, water pollutants, chemical instruments and methods, etc., can solve the problems of difficult separation, difficult harvesting of single-celled algae, and high cost, and achieves easy cultivation and favorable The effect of popularization and application and large output

Inactive Publication Date: 2008-07-09
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, because the algae cells are too small, it is difficult to harvest a large number of single-celled algae; and it is difficult to separate, resulting in high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] The removal of benzene in papermaking wastewater of example 1

[0018] Select fresh emerald green, well-grown Clado algae to be fixed on a mesh carrier (a circle with a diameter of 15 cm) built by nylon ropes, place tap water for domestication and cultivation for 2 days, and domestication conditions: light intensity 3000lx, humidity 45%RH, The temperature was 18°C, and the light-dark cycle ratio was 12:12.

[0019] Take 5 L of papermaking wastewater with a benzene concentration of 156.22 mg / L and place it in a culture tank. The height of the waste water in the culture tank is 25 cm. Place the acclimatized net-shaped carrier loaded with Cladophora on the surface of the wastewater, so that the coverage rate of Cladophora reaches 75%. Treatment conditions: light intensity is 3000lx, humidity is 35-50%RH, temperature is 18°C, and the light-dark cycle ratio is 12 Under the condition of : 12, decontaminate with domesticated Cladophora for 2 hours.

[0020] Removal:

[0021...

example 2

[0022] The removal of toluene in example 2 papermaking wastewater

[0023] Select fresh emerald green, well-growing Cladophora and fix it on a mesh carrier (circular with a diameter of 15 cm) built by nylon ropes, and place it in tap water for domestication and cultivation for 2 days. The domestication conditions: light intensity 3000lx, humidity 40-50% RH, temperature 18°C, light-dark cycle ratio 12:12.

[0024] Take 5L of papermaking wastewater whose concentration of toluene is 92.14 mg / L and place it in a culture tank. The height of the waste water in the culture tank is 30 cm. Place the acclimatized net-shaped carrier loaded with Cladoides on the surface of the wastewater, so that the coverage of Cladoides reaches 75%. The treatment conditions: light intensity is 3000lx, humidity is 40%RH, temperature is 18°C, and the light-dark cycle ratio is 12:12 Under the condition of , decontaminate with domesticated Cladophora for 4 hours.

[0025] Removal:

[0026] The absorbance...

example 3

[0027] The removal of benzene in example 3 printing and dyeing wastewater

[0028] Select fresh emerald, well-growing Cladophora and fix it on a mesh carrier (circular with a diameter of 15 cm) built by nylon ropes, place it in tap water for domestication and culture for 2 days, and domestication conditions: light intensity 3000lx, humidity 35-50% RH, temperature 18°C, light-dark cycle ratio 12:12.

[0029] Take 5 L of printing and dyeing wastewater whose benzene concentration is 143.22 mg / L and place it in a culture tank, and the height of the waste water in the culture tank is 35 cm. Place the acclimatized net-shaped carrier loaded with Cladophora on the surface of the wastewater, so that the coverage rate of Cladophora reaches 75%. Treatment conditions: light intensity is 3000lx, humidity is 35-50%RH, temperature is 18°C, and the light-dark cycle ratio is 12 Under the condition of : 12, decontaminate with domesticated Cladophora for 2 hours.

[0030] Removal:

[0031] Th...

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Abstract

The invention provides a method for removing benzene homologues from industrial waste water, which comprising 1) choosing fresh, green and well-grown cladophora to attach to meshed carriers which are laying in tap water for domesticated incubation for 1-2 days and 2) placing the domesticated meshed carriers carried with cladophora on water surface of the industrial waste water with depth of 20-40cm and treatment time of 2-6 hours. The domesticating and treat conditions comprises light intensity of 2500-3500lx, moistness of 35-50%RH, temperature of 15DEG C-25DEG C and light-dark cycle ratio of 12:12. Benzene and toluene in the sewage are treated by employing the cladophora with one-time removal rate reaching 62.7-78.6%, and the invention is simple in operation devices, low investment and favorable for promotion and application.

Description

technical field [0001] The invention relates to a method for removing benzene series in industrial waste water, in particular to a method for removing benzene and toluene in industrial waste water by using large filamentous green alga Cladophora. Background technique [0002] Benzene and toluene have been included in the blacklist of priority pollutants in water in my country in recent years because of their "three-causing (teratogenic, carcinogenic, and mutagenic)" effects, endocrine-disrupting effects, and reproductive genotoxicity. [0003] The methods currently used to remove benzene and toluene in wastewater include the following: [0004] 1. Activated carbon treatment method: Activated carbon has a lot of micropores and a huge specific surface area, so it has strong physical adsorption capacity and can simply adsorb organic pollutants in wastewater, which is not conducive to large-scale application. [0005] 2. Ultraviolet light decomposition method: The substance abs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F3/32C02F101/34C02F103/30
Inventor 谢树莲樊兰英张猛冯佳刘晓铃
Owner SHANXI UNIV
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