Degradation of crude oil by indigenous microorganisms supplemented with nutrients.
Different kinds of mineral nutrients(NO3-N, NH4-N and PO4-P) were applied in the simulated oil-polluted seawater for enhancing oil biodegradation in the N/P ratio 10:1 and 20:1. Although indigenous microorganisms have the ability to degrade oil, adding nutrients accelerated biodegradation rates significantly. For the group amended with NO3-N and PO4-P in the ratio 10:1, the reaction rate coefficient was 4 times higher than the natural biodegradation. Chemical and microbiological analysis showed that the optimal N/P ratio in the system is 10:1, and microorganisms tend to utilize nitrate rather than ammonium as N source.
Xia
Wen-Xiang
WX
Department of Environmental Engineering, Ocean University of China, Qingdao 266003, China. xiawx2001@yahoo.com.cn
Zheng
Xi-Lai
XL
Li
Jin-Cheng
JC
Song
Zhi-Wen
ZW
Zhou
Li
L
Sun
Hao-Fen
HF
D001673:Biodegradation, Environmental; D003470:Culture Media; D007700:Kinetics; D008386:Marine Biology; D010578:Petroleum / Q000378:metabolism*; D014871:Water Microbiology
D003470:Culture Media; D010578:Petroleum