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Bioremediation of highly contaminated oilfield soil: Bioaugmentation for enhancing aromatic compounds removal 被引量:1
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作者 Jun QIAO Chengdong ZHANG +1 位作者 Shuiming LUO Wei CHEN 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2014年第2期293-304,共12页
This study evaluated the effectiveness of different amendments--including a commercial NPK fertilizer, a humic substance (HS), an organic industrial waste (NovoGro), and a yeast-bacteria consortium--in the remedia... This study evaluated the effectiveness of different amendments--including a commercial NPK fertilizer, a humic substance (HS), an organic industrial waste (NovoGro), and a yeast-bacteria consortium--in the remediation of highly contaminated (up to 6% of total petroleum hydrocarbons) oilfield soils. The concentrations of hydrocarbon, soil toxicity, physicochemical properties of the soil, microbial population numbers, enzyme activities and microbial community structures were examined during the 90-d incubation. The results showed that the greatest degradation of total petroleum hydro- carbons (TPH) was observed with the biostimulation using mixture of NPK, HS and NovoGro, a treatment scheme that enhanced both dehydrogenase and lipase activities in soil. Introduction of exogenous hydrocarbon-degrading bacteria (in addition to biostimulation with NPK, HS and NovoGro) had negligible effect on the removal of TPH, which was likely due to the competition between exogenous and autochthonous microorganisms. None- theless, the addition of exogenous yeast-bacteria consor- tium significantly enhanced the removal of the aromatic fraction of the petroleum hydrocarbons, thus detoxifying the soil. The effect of bioaugmentation on the removal of more recalcitrant petroleum hydrocarbon fraction was likely due to the synergistic effect of bacteria and fungi. 展开更多
关键词 BIOREMEDIATION petroleum hydrocarbon bios- timulation BIOAUGMENTATION
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