Choi, Minkyu Cho, Kyungjin Jeong, Dawoon Chung, Yun-Chul Park, Joonhong Lee, Seockheon Bae, Hyokwan 2024-01-19T23:31:46Z 2024-01-19T23:31:46Z 2021-09-03 2018-02 1093-4529 https://pubs.kist.re.kr/handle/201004/121733 In this study, the effects of the ammonium loading rate (ALR) and inorganic carbon loading rate (ILR) on the nitrification performance and composition of a nitrifying bacterial community were investigated in a moving bed biofilm reactor, using poly(vinyl alcohol) (PVA) sponge cubes as a supporting carrier. Between the two ALRs of 0.36 and 2.16 kg-N m(-1) d(-1), stable partial nitritation was achieved at the higher ALR. Inorganic carbon was dosed at high levels: 33.1, 22.0, 16.4, 11.0, and 5.4times the theoretical amount. Nonetheless, nitrification efficiency was not affected by the ILR at the two ALRs. Quantitative PCR analysis of ammonia- and nitrite-oxidizing bacteria revealed that ALR is an important determinant of partial nitritation by accumulating ammonia-oxidizing bacteria in the nitrification system. In comparison, two nitrite-oxidizing bacterial genera (Nitrobacter and Nitrospira) showed almost the same relative abundance at various ALRs and ILRs. Terminal restriction fragment length polymorphism targeting the gene of ammonia monooxygenase subunit A revealed that Nitrosomonas europaea dominated under all conditions. English Taylor & Francis Effects of the ammonium loading rate on nitrite-oxidizing activity during nitrification at a high dose of inorganic carbon Article 10.1080/10934529.2018.1439854 1 Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering, v.53, no.8, pp.708 - 717 Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering 53 8 708 717 N scie scopus 000439892100004 2-s2.0-85042380520 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article BIOLOGICAL NITROGEN REMOVAL WASTE-WATER NITRIFYING BACTERIA COMMUNITY STRUCTURE DISSOLVED-OXYGEN AIRLIFT REACTOR PERFORMANCE ACCUMULATION AOB DENITRIFICATION Ammonium loading rate inorganic carbon nitrification nitrifying bacterial community