Minimization of sludge production in biological processes: an alternative solution for the problem of sludge disposal

Autor:	P. Camacho, Etienne Paul, H. Debellefontaine, V. Geaugey, S. Deleris
Rok vydání:	2002
Předmět:	Environmental Engineering Activated sludge Waste management Wastewater Chemistry Biomass Nitrification Autotroph Aeration Effluent Water Science and Technology Mixed liquor suspended solids
Zdroj:	Water Science and Technology. 46:63-70
ISSN:	1996-9732 0273-1223
DOI:	10.2166/wst.2002.0291
Popis:	A combined system associating activated sludge and ozonation was evaluated for the treatment of urban wastewater. Experiments have shown that 70% reduction in sludge production can be reached (compared to a reference system running in low loaded conditions Yobs = 0.28 g VSS.g COD-1) by applying an ozone dosage of 0.05 g O3/g VSStreated. Recycling of the ozonated sludge to the aeration tank induces a slight increase in effluent COD, but the biological treatment performance is maintained. Nitrification capabilities are not altered by the sludge reduction process and active biomass measurements revealed that autotrophic biomass seems to be less affected than the heterotrophs. Significant improvements in sludge settling characteristics are observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::543ec973632a6145aa0ea572fbefe13d https://doi.org/10.2166/wst.2002.0291 Zobrazit plný text záznamu