Wastewater pretreatment with ultrasonic irradiation to reduce toxicity

Gonze, E.; Fourel, L.; Gonthier, Y.; Boldo, P.; Bernis, A.

doi:10.1016/s1385-8947(99)00021-2

Cited by 72 publications

(31 citation statements)

References 27 publications

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“…Cell disintegration is proportional to supplied energy [9,10]. High frequencies promote oxidation by radicals, whereas low frequencies promote mechanical and physical phenomena like pressure waves [11]. With complex influents, radical performance decreases.…”

Section: Introductionmentioning

confidence: 99%

Solubilisation of waste-activated sludge by ultrasonic treatment

Bougrier

Carrère

Delgenès

2005

Chemical Engineering Journal

406

177

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Section: Introductionmentioning

confidence: 99%

Solubilisation of waste-activated sludge by ultrasonic treatment

Bougrier

Carrère

Delgenès

2005

Chemical Engineering Journal

406

177

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“…However, wastewater treatment using sonication in combination with other conventional oxidation methods is recommended (Sangave et al, 2007;Sangave and Pandit, 2006). Pre-treatment of distillery waste water with sonication has been shown to increase the biodegradability during conventional aerobic oxidation (Sangave and Pandit, 2006) and reduce the toxicity of the original effluent (Gonze et al, 1999). In our study, sonication alone was not effective in reducing color, COD, total phenolics and toxicity.…”

Section: Effect Of Sonication On the Effluents -Stepmentioning

confidence: 54%

A novel hybrid technology for remediation of molasses-based raw effluents

Verma

Raghukumar

Naik

2011

Bioresource Technology

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A novel three-step technology for treatment of four molasses-based raw industrial effluents, varying in their COD, color and turbidity is reported here. Sequential steps involved in this treatment are; (1) sonication of the effluents, (2) whole-fungal treatment of these by a ligninolytic marine fungus and (3) biosorption of the residual color with heat-inactivated biomass of the same fungus. Sonication reduced the foul odor and turbidity of the effluents. It increased biodegradability of the effluents in the second stage of treatment. Laccase production in the presence of all the four effluents was directly correlated with their decolorization. After the third step, a reduction of 60-80% in color, 50-70% in COD and 60-70% in total phenolics were achieved. Comparative mass and nuclear magnetic resonance spectra indicated increasing degradation of the effluent components after each stage. Toxicity (LC(50) values) against Artemia larvae was reduced by two to five folds.

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“…A survey of the relevant literature revealed evidence that BPA becomes degraded when exposed to ultrasound [32e34]. This phenomenon is due to the reaction of BPA with the hydroxyl radicals generated from the dissociation of water and oxygen during the sonication through an acoustic cavitation process [35]. The main degradation product generated was the monohydroxylated form of BPA, as shown in Fig.…”

Section: Development Of the Sers Methodsmentioning

confidence: 99%