反硝化
拉伤
氮气
胞外聚合物
细胞外
化学
环境化学
好氧反硝化
硝酸盐
反硝化细菌
碳纤维
制浆造纸工业
碳氮比
废物管理
微生物
作者
Shuai Zhang,Junfeng Su,Zhijie Zheng,Shu Yang
标识
DOI:10.1016/j.biortech.2020.123733
摘要
Abstract This paper aims to determine the denitrification strategies of strain YSF15 in carbon scarcity condition from novel view of organic nitrogen, soluble microbial products (SMP) and extracellular polymeric substances (EPS). The batch tests demonstrated that strain YSF15 could achieve complete denitrification at C/N of 3.0. The conversion ratio of nitrogen gas accounted for 89.03%, 85.29% and 82.95% among total nitrogen in C/N systems from 3.0 to 5.0, respectively, indicating denitrification instead of assimilation was the major contribution to nitrogen removal. C/N could affect composition and content of organic nitrogen, SMP and EPS. The biodegradability of EPS was better than SMP, whereas polysaccharide (PS) likely correlated with nitrogen removal, predating the protein (PN). These results implied high biodegradability of EPS and more electron donors for denitrification both improved denitrification capacity of strain YSF15, which revealed the potential contribution of bacterium with production of biodegradable SMP or EPS in biological treatment process.
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