Degradation of Chrysene by Enriched Bacterial Consortium

Frontiers in Microbiology
Sagar VaidyaDatta Madamwar

Abstract

Chrysene is a high molecular weight (HMW), polycyclic aromatic hydrocarbon (PAH) known for its recalcitrance and carcinogenic properties and sparsely soluble (0.003 mg/L) in aqueous medium. Due to these refractory properties, bioavailability of chrysene is very low and therefore is persistence in the environment escaping the metabolism by microorganisms. However, few bacterial and fungal strains are reported to degrade chrysene, but with lower efficiency, requiring additional/extraneous carbon sources (co-substrates) for it's complete mineralization. In this study, development, enrichment and characterization of bacterial consortium ASDC, consisting of Rhodococcus sp., ASDC1; Bacillus sp. ASDC2; and Burkholderia sp. ASDC3 were reported. Chrysene was utilized as a sole source of carbon and energy by the consortium, having maximum degradation rate of 1.5 mg/L/day and maximum growth rate of 0.125/h, under optimized conditions of pH 7.0, 37°C under aeration of 150 rpm on gyrating shaking. Chrysene degradation was unaffected in presence of other PAHs like pyrene, fluoranthene, naphthalene, phenanthrene, benzene, toluene and xylene, individually as well as in mixture. The results revealed that peptone, ammonium nitrate, sodium succin...Continue Reading

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Citations

Feb 7, 2020·International Journal of Systematic and Evolutionary Microbiology·Roland C WilhelmDaniel H Buckley
May 14, 2020·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Vivek Parab, Manju Phadke
Nov 24, 2019·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Thapelo P MalematjaTonderayi Matambo
Mar 20, 2019·Bioprocess and Biosystems Engineering·Dunia A Al FarrajRoua Al-Kufaidy
Nov 24, 2020·Frontiers in Microbiology·Avani Bharatkumar PatelDatta Madamwar

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