Optimization of a bacterial consortium for nitrobenzene degradation

Water Science and Technology : a Journal of the International Association on Water Pollution Research
D F JinY H Zhao

Abstract

Three bacterial strains, Arthrobacter sp. NB1, Serratia sp. NB2 and Stenotrophomonas sp. NB3, were isolated from contaminated sludge by using nitrobenzene as a sole source of carbon and nitrogen. It was observed that all three strains could degrade nitrobenzene at 400 mg/L initial concentration and mixed-cultivation of these strains could enhance the degradation of nitrobenzene compared with mono-cultivation. Mixture design was used for adjusting the proportions of each strain and the optimal ratio of inoculation size was NB1:NB2:NB3 = 4:4:5, where the nitrobenzene degradation percentage was two times higher than for by the single strain. The results of Plackett-Burman design indicated that Mg(2+), Ca(2+), Fe(2+), Zn(2+) and Mn(2+) had a positive effect on the degradation of nitrobenzene, while Cu(2+) and Co(2+) had a negative effect on it.

Citations

Jun 27, 2012·Applied Microbiology and Biotechnology·H MikeskováK Svobodová
Nov 29, 2012·Applied Microbiology and Biotechnology·Chuan XuMing Chen
Dec 22, 2019·Biotechnology Advances·Xiujuan QianKatrin Ochsenreither

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