title: Biodegradation of tech-hexachlorocyclohexane in a upflow anaerobic sludge blanket (UASB) reactor.
abstract: Biodegradability of technical grade hexachlorocyclohexane (tech-HCH) was studied in an upflow anaerobic sludge blanket reactor (UASB) under continuous mode of operation in concentration range of 100-200 mg/l and constant HRT of 48 h. At steady state operation more than 85% removal of tech-HCH (upto 175 mg/l concentration) and complete disappearance of beta-HCH was observed. Kinetic constants in terms of maximum specific tech-HCH utilization rate (k) and half saturation velocity constant (K(L)) were found to be 11.88 mg/g/day and 8.11 mg/g/day, respectively. The tech-HCH degrading seed preparation, UASB reactor startup and degradation in continuous mode of operation of the reactor is presented in this paper.
authors.affiliation: Environmental Biotechnology Division, National Environmental Engineering Research Institute, NEERI, Nehru Marg, Nagpur 440 020, India.
authors.forename: Praveena
authors.initials: P
authors.lastname: Bhat
authors.forename: M Suresh
authors.initials: MS
authors.lastname: Kumar
authors.forename: Sandeep N
authors.initials: SN
authors.lastname: Mudliar
authors.forename: T
authors.initials: T
authors.lastname: Chakrabarti
mesh_terms: D000693:Anaerobiosis; D001421:Bacteria, Anaerobic / Q000378:metabolism; D001673:Biodegradation, Environmental; D019149:Bioreactors; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D001556:Hexachlorocyclohexane / Q000378:metabolism*; D007700:Kinetics; D012722:Sewage
chemical_list: D012722:Sewage; D001556:Hexachlorocyclohexane