Heterotrophic nitrification and aerobic denitrification by Diaphorobacter polyhydroxybutyrativorans SL-205 using poly(3-hydroxybutyrate-co-3hydroxyvalerate) as the sole carbon source

文献类型： 外文期刊

第一作者： Zhang, Shusong

作者： Zhang, Shusong;Sun, Xingbin;Fan, Yueting;Zhang, Shusong;Fan, Yueting;Qiu, Tianlei;Gao, Min;Wang, Xuming;Wang, Xuming

作者机构：

关键词： Diaphorobacter polyhydroxybutyrativorans;Carbon source;Poly(3-hydroxybutyrate-co-3-hydroxyvalerate);Heterotrophic nitrification;Aerobic denitrification

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

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收录情况： SCI

摘要： A new strain of Diaphorobacter polyhydroxybutyrativorans (strain SL-205) was recently isolated and identified. SL-205 can utilize nitrate and nitrite for denitrification and ammonium for nitrification using poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) as the carbon source under aerobic conditions. SL-205 removed 99.11% of NH4+-derived N (83.90 mg/L), 95.02% of NO3-N (308.24 mg/L), and 84.13% of NO2-N (211.70 mg/L), with average removal rates of 1.73 mg NH4+-N/(L.h), 6.10 mg NO3-N/(L.h), and 4.95 mg NO2-N/(L.h). Nitrogen gas was the primary end-product, with negligible nitrous oxide accumulation during ammonium removal, accounting for 57.85% of the removed NH4+-N and 52.30% of the initial NH4+-N. Moreover, hydroxylamine oxidoreductase, nitrate reductase, and nitrite reductase were detected, further indicating that strain SL-205 underwent heterotrophic nitrification coupled with aerobic denitrification (NH4+ -> NH2OH -> NO2 -> NO3 -> NO2 -> N2O -> N-2). These results support the use of PHBV as a carbon source for nitrogen removal from water and wastewater by strain SL-205. (C) 2017 Elsevier Ltd. All rights reserved.

分类号： Q

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