4.7 Article

Biodegradation of phenanthrene in bioaugmented microcosm by consortium ASP developed from coastal sediment of Alang-Sosiya ship breaking yard

期刊

MARINE POLLUTION BULLETIN
卷 74, 期 1, 页码 199-207

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2013.07.001

关键词

Bacterial consortium; Phenanthrene; Bioaugmentation; Petroleum hydrocarbon; Microcosm

资金

  1. Department of Science and Technology (DST), New Delhi, India
  2. CSIR New Delhi, India

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A phenanthrene-degrading bacterial consortium (ASP) was developed using sediment from the AlangSosiya shipbreaking yard at Gujarat, India. 16S rRNA gene-based molecular analyses revealed that the bacterial consortium consisted of six bacterial strains: Bacillus sp. ASP1, Pseudomonas sp. ASP2, Stenotrophomonas maltophilia strain ASP3, Staphylococcus sp. ASP4, Geobacillus sp. ASP5 and Alcaligenes sp. ASP6. The consortium was able to degrade 300 ppm of phenanthrene and 1000 ppm of naphthalene within 120 h and 48 h, respectively. Tween 80 showed a positive effect on phenanthrene degradation. The consortium was able to consume maximum phenanthrene at the rate of 46 mg/h/1 and degrade phenanthrene in the presence of other petroleum hydrocarbons. A microcosm study was conducted to test the consortium's bioremediation potential. Phenanthrene degradation increased from 61% to 94% in sediment bioaugmented with the consortium. Simultaneously, bacterial counts and dehydrogenase activities also increased in the bioaugmented sediment. These results suggest that microbial consortium bioaugmentation may be a promising technology for bioremediation. (C) 2013 Elsevier Ltd. All rights reserved.

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