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Method for treating dye wastewater with high concentration by using technology combining ultrasound wave with enzyme

A technology for the treatment of dye wastewater and technology, which is applied in the field of industrial organic wastewater treatment, can solve the problems of decreased adsorption capacity of activated carbon, short service life of activated carbon, and reduction of dye wastewater, so as to achieve not easy loss, efficient and stable degradation effect, and good degradation effect Effect

Inactive Publication Date: 2010-06-16
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are many pretreatment methods for dye wastewater, the most common of which is physical method such as activated carbon adsorption. Although it can absorb and remove some organic matter in water, the activated carbon has a short service life and difficult regeneration. Soluble dyes, poor adsorption effect
In recent years, some advanced oxidation technologies such as ultrasonic oxidation have also become one of the hot methods for pretreatment of dye wastewater, but the single use of ultrasonic oxidation reduces the chroma and COD of dye wastewater Cr concentration, the effect is not obvious

Method used

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  • Method for treating dye wastewater with high concentration by using technology combining ultrasound wave with enzyme
  • Method for treating dye wastewater with high concentration by using technology combining ultrasound wave with enzyme
  • Method for treating dye wastewater with high concentration by using technology combining ultrasound wave with enzyme

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Embodiment 1

[0014] Embodiment 1: to the treatment of methyl orange wastewater

[0015] like figure 1 As shown, the COD Cr 5000ML of methyl orange wastewater with a concentration of 500mg / L is passed into the sonochemical reactor, and the treated granular activated carbon is loaded. The particle size of the activated carbon is 1.5-4.0mm. Laccase is attached to the surface and pores of the activated carbon. Activated carbon and water for aeration. The frequency of the sonochemical reactor is adjusted to 40kHz, the power is 40W, the temperature is controlled at 15-35°C, and the reaction time of the dye wastewater in the sonochemical reactor is 10min. After activated carbon adsorption, ultrasound, and laccase degradation of methyl orange wastewater, the decolorization rate reaches 70%, and the BOD 5 / COD Cr When the value is greater than 0.7, the biodegradability of wastewater is improved, which fully meets the requirements of subsequent biological treatment. Subsequent biological treatm...

Embodiment 2

[0016] Embodiment 2: to the processing of actual dye wastewater

[0017] The main components in the actual dye wastewater are azo dyes.

[0018] like figure 2 As shown, the COD Cr 5000ML of actual dye wastewater with a concentration of 2000mg / L is passed into the sonochemical reactor after removing large suspended particles, and loaded with treated granular activated carbon. The particle size of activated carbon is 1.5-4.0mm. With laccase attached, activated carbon and water are aerated. The frequency of the sonochemical reactor is adjusted to 40kHz, the power is 40W, the temperature is controlled at 15-35°C, and the reaction time of the dye wastewater in the sonochemical reactor is 10min. The actual dye wastewater after activated carbon adsorption, ultrasonic and laccase degradation, the decolorization rate reaches 60%, BOD 5 / COD Cr When the value is greater than 0.5, the biodegradability of wastewater is improved, which fully meets the requirements of subsequent biolo...

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Abstract

The invention relates to a method for treating dye wastewater with high concentration by using a technology combining ultrasound wave with enzyme, comprising the following steps of: feeding the treated active carbon in a sonochemical reactor; attaching enzyme to the surface of the active carbon and holes; filtering and removing large-particle suspended substances in the dye wastewater; introducing the large-particle suspended substances into the sonochemical reactor; under the aeration condition, radiating the fluidized state active carbon to which the enzyme is attached by using ultrasound wave with the frequency 40kHz and the power of 40W; generating a hydroxyl free radical with extremely-strong oxidation capacity and adsorption and decolorization reaction of the active carbon by using the coupling action of ultrasound-enzyme technology, thereby improving the biochemical property of the wastewater; and enabling the treated dye wastewater flowing out of the sonochemical reactor and then entering a bioreactor for further degrading. The invention has remarkable decolorization effect of the wastewater and greatly improves the biochemical property when being used as a pretreatment method of the dye wastewater with high concentration.

Description

Technical field: [0001] The invention relates to a treatment method for industrial organic waste water, in particular to a method for treating high-concentration dye waste water with ultrasonic and enzyme technology, which is suitable for organic waste water containing azo dyes. Background technique: [0002] Dye wastewater is one of the difficult-to-treat industrial wastewater recognized at home and abroad, and its treatment difficulties are mainly manifested in the following two aspects: one is high chroma, which is difficult to decolorize efficiently; the other is COD Cr High concentration, most of the organic matter BOD in water 5 / COD Cr The value is around 0.3, biochemical but difficult to biochemical. It is difficult to achieve the expected goal by ordinary fungus biological direct treatment, because most of the organic matter in the dye wastewater has strong biological toxicity, which will inhibit the activity of microorganisms and affect the COD Cr Removes and de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F1/36C02F1/28
Inventor 程建萍唐志国陈长琦汪家权
Owner HEFEI UNIV OF TECH
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