Enhanced biodegradation of hydrocarbons in petroleum tank bottom oil sludge and characterization of biocatalysts and biosurfactants

Journal of Environmental Management
S Hepziba SuganthiK Ramani

Abstract

Petroleum hydrocarbon removal from tank bottom oil sludge is a major issue due to its properties. Conventional physicochemical treatment techniques are less effective. Though the bioremediation is considered for the hydrocarbon removal from tank bottom oil sludge, the efficiency is low and time taking due to the low yield of biocatalysts and biosurfactants. The focal theme of the present investigation is to modify the process by introducing the intermittent inoculation for the enhanced biodegradation of hydrocarbons in the tank bottom oil sludge by maintaining a constant level of biocatalysts such as oxidoreductase, catalase, and lipase as well as biosurfactants. In addition, the heavy metal removal was also addressed. The microbial consortia comprising Shewanalla chilikensis, Bacillus firmus, and Halomonas hamiltonii was used for the biodegradation of oil sludge. One variable at a time approach was used for the optimum of culture conditions. The bacterial consortia degraded the oil sludge by producing biocatalysts such as lipase (80 U/ml), catalase (46 U/ml), oxidoreductase (68 U/ml) along with the production of lipoprotein biosurfactant (152 mg/g of oil sludge) constantly and achieved 96% reduction of total petroleum hydrocar...Continue Reading

Citations

Jan 11, 2020·FEMS Microbiology Reviews·Olivier N LemaireChantal Iobbi-Nivol
Jul 14, 2019·Applied and Environmental Microbiology·Olivier N LemaireChantal Iobbi-Nivol
Feb 16, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Xiumei TianHe Tian
Feb 2, 2021·Ecotoxicology and Environmental Safety·Qinghua BaoYuandong Ma
Aug 23, 2021·Environmental Science and Pollution Research International·Vivek Kumar GaurAshok Pandey

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