title: Oxidative destabilization of dissolved organics and E. coli in domestic wastewater through immobilized cell reactor system.
abstract: Domestic wastewater contains a considerable amount of pathogenic organisms besides non-biodegradable organics. The conventional technologies followed for the treatment of domestic wastewater are less efficient in removing pathogenic organisms despite substantial removal of dissolved organics. The focal theme of the present investigation was to use a chemo-autotrophic activated carbon oxidation (CAACO) system, an immobilized cell reactor using chemoautotrophs (Bacillus sp.) for the treatment of domestic wastewater. The oxidation of organics and Escherichia coli in wastewater is controlled by the parameters space time, O(2)/COD, bed height and cod loading. The scheme comprised of anaerobic treatment, sand filtration and CAACO treatment removed BOD. COD, Total organic carbon (TOC), dissolved protein, total Kjeldhal nitrogen (TKN) and bacterial count (most probable number (MPN)) by 81%, 92%, 84%, 94%, 93% and 99.9997%, respectively. The low concentration of E. coli in the CAACO-treated wastewater was completely eliminated through UV irradiation in 3 min at 254 nm.
authors.affiliation: Department of Environmental Technology, Central Leather Research Institute, Adyar, Chennai, Tamil Nadu, India. t.ganesansekaran@hotmail.com
authors.forename: G
authors.initials: G
authors.lastname: Sekaran
authors.forename: K
authors.initials: K
authors.lastname: Ramani
authors.forename: A
authors.initials: A
authors.lastname: Ganesh Kumar
authors.forename: B
authors.initials: B
authors.lastname: Ravindran
authors.forename: L
authors.initials: L
authors.lastname: John Kennedy
authors.forename: A
authors.initials: A
authors.lastname: Gnanamani
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D001407:Bacillus / Q000378:metabolism* / Q000528:radiation effects; D019149:Bioreactors; D002244:Carbon / Q000302:isolation & purification / Q000378:metabolism; D004926:Escherichia coli / Q000378:metabolism* / Q000528:radiation effects; D006798:Housing; D006801:Humans; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism; D009930:Organic Chemicals / Q000302:isolation & purification / Q000378:metabolism*; D010084:Oxidation-Reduction; D011506:Proteins / Q000302:isolation & purification / Q000378:metabolism; D013997:Time Factors; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014873:Water Pollutants / Q000302:isolation & purification / Q000378:metabolism / Q000528:radiation effects
chemical_list: D009930:Organic Chemicals; D011506:Proteins; D014873:Water Pollutants; D002244:Carbon; D009584:Nitrogen