Khan, M. Hammad Choi, Daehee Cho, Kyungjin Jung, Jinyoung 2024-01-19T23:02:18Z 2024-01-19T23:02:18Z 2022-01-25 2018-04 0964-8305 https://pubs.kist.re.kr/handle/201004/121507 This study investigated long-term deammonification operation, of 400 days, utilizing PVA/alginate carriers prepared with the addition of foaming agent (FA) adjusted from 0 to 1.2% (F-0 to F-1.2). FTIR spectra showed variations in the extent of crosslinking in the surface and the core areas of carriers. FA addition improved the already low crosslinking in the core areas and porosity in the surface areas, yielding higher endurance to internally produced gas. In the start-up period of continuous test, FA addition favored deammonification bacteria over denitrifiers. Increasing the FA decreased the extent and duration of heterotrophic denitrification that was superseded by deammonification after 30 d of operation. After 100 d, F-0.6 had the highest deammonification to denitrification ratio and gave a nitrogen removal rate (NRR) of 3.2 kg N.m(-3).d(-1) at 317 d of operation. Also, the 16S rRNA gene concentration of the deammonification bacteria was highest in F-0.6, which corresponded with the specific anammox activity (SAA) results. Overall, the improved PVA/alginate carriers gave higher SAA and deammonification bacteria concentration resulting in a stable long-term deammonification operation with high NRR. English Elsevier BV Long-term efficient deammonification operation with PVA/alginate carrier modified by foaming agent Article 10.1016/j.ibiod.2018.02.003 1 International Biodeterioration & Biodegradation, v.129, pp.148 - 155 International Biodeterioration & Biodegradation 129 148 155 N scie scopus 000429761000019 2-s2.0-85042091874 Biotechnology & Applied Microbiology Environmental Sciences Biotechnology & Applied Microbiology Environmental Sciences & Ecology Article ANAEROBIC AMMONIUM OXIDATION CONVENTIONAL ACTIVATED-SLUDGE ALCOHOL)/SODIUM ALGINATE GEL LANDFILL LEACHATE TREATMENT ANAMMOX BACTERIA GRANULAR SLUDGE START-UP PARTIAL NITRITATION POLYVINYL-ALCOHOL NITROGEN REMOVAL Long-term deammonification operation PVA/alginate Foaming agent Specific anammox activity Deammonification bacteria concentration Crosslinking