title: Experimental study on biodegradation of dairy wastewater using bacterial isolate.
abstract: The activated sludge process facilitates the removal of carbonaceous BOD, the coagulation of colloidal solids and the stabilization of organic matter by a variety of microorganisms (principally bacteria). Bacillus sporogenes is one of the predominant bacteria found in dairy waste water. The bacteria Bacillus .sp was isolated from the dairy wastewater and inoculated into the samples taken from the dairy industry. Laboratory tests were carried out by inoculating varied cell concentrations and incubating under aerobic conditions to determine the removal of COD and protein from the samples. During the incubation, microbial growth was monitored by the measurement of optical density. The biodegradation ability of the native bacteria was also compared with the commercial inoculum of the same isolate. It was observed that the sample inoculated with 5 x 10(6) CFU/mL cell concentration showed a maximum protein degradation of 92.8% after 14 days and COD removal of 91.3% in 18 days. The COD removal was higher for the commercial inoculum and the protein removal was higher in the selected native strain.
authors.affiliation: VLB Janakiammal Polytechnic College, Coimbatore - 641 042, India.
authors.forename: Livingston Peter
authors.initials: LP
authors.lastname: Goldwyn
authors.forename: M K
authors.initials: MK
authors.lastname: Saseetharan
authors.forename: J
authors.initials: J
authors.lastname: Jeyanthi
authors.forename: Begum N
authors.initials: BN
authors.lastname: Nuzrat
mesh_terms: D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D003612:Dairying; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000382:microbiology*
chemical_list: D062065:Wastewater