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Clean Technologies and Environmental Policy

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01.06.2011 | Original Paper

Effect of ozonation and ultrasonication pretreatment processes on co-digestion of tannery solid wastes

verfasst von: K. Sri Bala Kameswari, Chitra Kalyanaraman, K. Thanasekaran

Erschienen in: Clean Technologies and Environmental Policy | Ausgabe 3/2011

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Abstract

Studies were carried out by the application of ozonation and ultrasonication as pretreatment processes on primary and secondary sludge generated during treatment of tannery wastewater to enhance the soluble chemical oxygen demand (SCOD). Further, co-digestion (simultaneous digestion of two or more substrates) studies were carried out in batch reactors using the fleshings (a solid waste generated during the processing of raw hides or skins into finished leather) along with the primary and the secondary sludge wherein biogas generation was compared with and without pre-treated sludge using ozone and ultrasonication processes, respectively. It was found that, application of pretreatment processes enhanced biogas generation by 45% in the case of ozone pre-treated sludge and 53% by ultrasonication processes, respectively, in conjunction with the fleshings. However, considering the optimum contact time required, application of ultrasonication as a pretreatment process was found to be the most appropriate and viable process to enhance the SCOD. This pretreatment process has the potential for implementation in tanneries using the shortest possible ultrasonication time to minimize energy cost when compared with ozonation time.

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Titel: Effect of ozonation and ultrasonication pretreatment processes on co-digestion of tannery solid wastes
verfasst von: K. Sri Bala Kameswari
Chitra Kalyanaraman
K. Thanasekaran
Publikationsdatum: 01.06.2011
Verlag: Springer Berlin Heidelberg
Erschienen in: Clean Technologies and Environmental Policy / Ausgabe 3/2011
Print ISSN: 1618-954X
Elektronische ISSN: 1618-9558
DOI: https://doi.org/10.1007/s10098-010-0334-0

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