Study on the biodegradation of crude oil by free and immobilized bacterial consortium in marine environment

被引：82
|
作者：
Chen, Qingguo [1 ]
Li, Jingjing [1 ]
Liu, Mei [1 ]
Sun, Huiling [1 ]
Bao, Mutai [2 ]
机构：
[1] Zhejiang Ocean Univ, Coll Marine Sci & Technol, Zhoushan, Peoples R China
[2] Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Qingdao, Peoples R China
来源：
PLOS ONE | 2017年 / 12卷 / 03期
关键词：
EXIGUOBACTERIUM SP PMA; PSEUDOMONAS-AERUGINOSA; MICROBIAL CONSORTIUM; DIESEL OIL; BIOREMEDIATION; HYDROCARBONS; ADSORPTION; ALGINATE; STRAINS; BEADS;
D O I：
10.1371/journal.pone.0174445
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Five strains of bacteria, namely, Exiguobacterium sp. ASW-1, Pseudomonas aeruginosa strain ASW-2, Alcaligenes sp. ASW-3, Alcaligenes sp. ASS-1, and Bacillus sp. ASS-2, were isolated from the Zhejiang coast in China. The mixed flora of the five strains performed well with degrading 75.1% crude oil (1%, w/v) in 7 days. The calcium alginate - activated carbon embedding carrier was used to immobilize bacterial consortium. Immobilized cells performed better than free ones in variations of environmental factors containing incubated temperature, initial pH, salinity of the medium and crude oil concentration. The degradation process of crude oil by immobilized bacteria was accelerated compared with that of the free ones. Bacterial consortium showed better performance on biodegradation of normal alkanes than that of PAHs. Improvement of immobilization on the biodegradation efficiency of normal alkanes (31.9%) was apparently high than that of PAHs (1.9%).
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页数：23
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