[Effect of Elodea nuttallii-Immobilized Nitrogen Cycling Bacteria on the Mechanism of Nitrogen Removal in Polluted River Water].

• DOI: 10.13227/j.hjkx.201702120
• Publication Date: 2017-11-08
• Authors: Hao Wang; Zhengkui Li; Yi‐Pin Zhang; Bangjing Ding
• Keywords: Anammox

Surface water, Elodea nuttallii and undisturbed sediment cores from the Qinshui River in Gonghu Bay were collected to carry out a simulation experiment laboratory study effect of nuttallii-immobilized nitrogen-cycling bacteria on nitrogen removal mechanisms river water. In this study, transformation fate ammonium among four different treatment groups investigated by using stable 15 N isotope pairing technique combined with high-throughput sequencing technology[Treatment A:bare sediment, Treatment B:sediment+immobilized cycling (INCB), C:sediment+E. nuttallii, D:sediment+INCB+E. nuttallii]. The results mass-balance model showed that there three pathways ultimate nitrogen:precipitated sediments, absorbed E. consumed microbial processes[denitrification anaerobic oxidation (ANAMMOX)]. percentages assimilated NH4+ 25.44% 19.79% for treatments C D. storage ratio accounted 7.94%, 5.52%, 6.47% 4.86% A, B, C, D, respectively. proportion lost as N-labelled gas 16.06%, 28.86%, 16.93% 33.09% groups, Denitrification anammox bacterial primary processes N2 N2O production. abundance diversity microorganisms was relatively higher (E-INCB) assemblage technology applied. Furthermore, rates 24%, 34.38%, 48.84% 57.74% These show E-INCB may improve capacity