Characterization of a marine origin aerobic nitrifying-denitrifying bacterium

Journal of Bioscience and Bioengineering
Haiyan ZhengZhi-Pei Liu

Abstract

The bacterial strain F6 was isolated from a biological aerated filter that is used for purifying recirculating water in a marine aquaculture system and was identified as Marinobacter sp. based on the analysis of its 16S rRNA gene sequence. Strain F6 showed efficient aerobic denitrifying ability. One hundred percent of nitrates and 73.10% of nitrites were removed, and the total nitrogen (TN) removal rates reached 50.08% and 33.03% under a high nitrate and nitrite concentration in the medium, respectively. N(2)O and (15)N(2), as revealed by GC-MS and GC-IRMS, were the products of aerobic denitrification. Factors affecting the growth and aerobic denitrifying performance of strain F6 were investigated. The results showed that the optimum aerobic denitrification conditions for strain F6 were the presence of sodium succinate as a carbon source, a C/N ratio of 15, salinity ranging from 32-35 g/L of NaCl, incubation temperature of 30°C, an initial pH of 7.5, and rotation speed of 150 rpm [dissolved oxygen (DO) 6.75 mg/L]. In addition, strain F6 was confirmed to be a heterotrophic nitrifier through its NO(2)(-) generation and 25.96% TN removal when NH(4)(+) was used as the sole N source. Therefore, strain F6, the first reported member o...Continue Reading

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Citations

Apr 26, 2015·Journal of Bioscience and Bioengineering·YuXiang LiuYongKang Lv
Nov 18, 2015·Applied Biochemistry and Biotechnology·Long-Jie GuoMeng Tian
Mar 6, 2015·International Journal of Systematic and Evolutionary Microbiology·Mio TakeuchiSusumu Sakata
Sep 13, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yifang ZhangYiheng Jiang
Oct 7, 2019·Journal of Applied Microbiology·Ankita RajtaPriyanka Pathania
Mar 14, 2020·Microbiology Resource Announcements·Ryan A NuttallPia H Moisander
Jul 17, 2021·Journal of Environmental Management·Prangya Ranjan RoutRao Y Surampalli

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