环境化学
寡养单胞菌
硝化作用
污染物
生物修复
氮气
铵
沉积物
微生物种群生物学
硝酸盐
环境科学
化学
生物
生态学
污染
假单胞菌
细菌
有机化学
古生物学
遗传学
作者
Xiaomei Su,Binbing Xue,Yuyang Wang,Muhammad Zaffar Hashmi,Hongjun Lin,Jianrong Chen,Rongwu Mei,Zhen Wang,Fenglian Sun
标识
DOI:10.1016/j.ecoenv.2019.04.067
摘要
Identifying indigenous bacterial community and exploring the potential of native microorganisms are crucial for in situ bioremediation of nitrogenous pollutants in water bodies. This study evaluated the bacterial communities of sediment samples from a nitrogen polluted river, and revealed the possible environmental factors shaping the bacterial populations. Importantly, viable but non-culturable bacteria which possessed nitrogen removal capabilities in indigenous population of the sediments were explored by resuscitation promoting factor (Rpf). It was found that the sediments from upstream (URS) and lower stream (LRS) of Puyang river showed both different pollutants levels and bacterial community. Nitrate nitrogen, organic carbon and ammonium nitrogen probably had a significant effect on bacterial compositions between URS and LRS. From URS and LRS, a total of thirteen strains with heterotrophic nitrification ability were resuscitated by Rpf addition, which belonged to genera Bacillus, Pseudomonas, Stenotrophomonas and Acinetobacter. Among them, the strain Pseudomonas sp. SSPR1 was found to display high removal capabilities of simultaneous nitrification and denitrification, and the average ammonium and nitrate removal rates were 2.23 and 0.86 mg/(L·h), respectively. These resuscitated strains could be considered to be used for biological nitrogen removal in rivers and their receiving water bodies.
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