Jo, Yeadam Cho, Kyungjin Choi, Hyungmin Lee, Changsoo 2024-01-19T17:33:41Z 2024-01-19T17:33:41Z 2021-09-05 2020-05 0960-8524 https://pubs.kist.re.kr/handle/201004/118684 This study investigated the single-stage partial nitritation and anammox (S-PNA) treatment of low-strength ammonia wastewater (<= 140 mg NH4+-N/L). Upflow dual-bed gel-carrier reactor (UDGR) with polyvinyl al- cohol cryogel biocarriers, developed in this study, was employed for the anammox biomass enrichment from conventional activated sludge and subsequent S-PNA experiments. Anammox biomass was successfully enriched from conventional activated sludge. The enriched anammox carriers were inoculated together with gel carriers containing nitrifying sludge into the S-PNA reactors. S-PNA activity developed rapidly, and the nitrogen removal efficiency and rate reached up to 90.1% (with complete ammonia removal) and 0.15 kg N/m(3).d, respectively, under low nitrogen loading conditions (0.10-0.17 kg N/m(3).d). The microbial community structure changed significantly while adapting to anammox and S-PNA conditions. Anammox was likely driven solely by a Candidates Jettenia population accounting for <= 49.4% of bacterial 16S rRNA genes. The results demonstrate that the UDGR-based S-PNA is suitable for treating low-strength wastewater. English Elsevier BV Treatment of low-strength ammonia wastewater by single-stage partial nitritation and anammox using upflow dual-bed gel-carrier reactor (UDGR) Article 10.1016/j.biortech.2020.123023 1 Bioresource Technology, v.304 Bioresource Technology 304 N scie scopus 000518852900059 2-s2.0-85079856122 Agricultural Engineering Biotechnology & Applied Microbiology Energy & Fuels Agriculture Biotechnology & Applied Microbiology Energy & Fuels Article CONVENTIONAL ACTIVATED-SLUDGE NITROGEN REMOVAL SP NOV. PARTIAL NITRIFICATION PILOT-SCALE GEN. NOV. START-UP BACTERIA COMMUNITY OXIDATION Anammox Partial nitritation PVA cryogel Single-stage treatment Upflow dual-bed gel-carrier reactor