Choi, Dae hee Cho, Kyung jin Jung, Jin young 2024-01-12T03:02:14Z 2024-01-12T03:02:14Z 2022-06-30 2022-06 1369-703X https://pubs.kist.re.kr/handle/201004/76699 This study aimed to investigate the challenges based on field experience and their corresponded overcoming strategies in a single-stage sequencing batch reactor for deammonification process. During operating the pilot deammonification for 580 days, several challenges were faced that seriously deteriorated nitrogen removal performance. First, chemical-based dewatering system increased heavy metal concentrations in influent wastewater, which inhibited the microbial activity. Second, selective retention of anaerobic ammonium oxidation (ANAMMOX) biomass was required. Third, an unforeseen inflow of anaerobic digestion sludge caused various mechanical problems, which resulted in process failure. Fourth, the lack of experiences in the construction of large-scale reactors resulted in low energy efficiency. To overcome these challenges, we applied various operational strategies (i.e., changing dewatering system, use of newly developed physical microorganism separator (PMS) device, bio-augmentation, residual nitrite control, energy optimization, etc.). As a result, the single-stage deammonification was successfully operated with a high nitrogen removal rate (0.7 kg/m3/d) and low energy consumption (1.2 ± 0.1 kW h/kg N). English Elsevier BV Efficient overcoming strategies for the challenges faced in sidestream deammonification: Large-stage field experience Article 10.1016/j.bej.2022.108444 1 Biochemical Engineering Journal, v.183 Biochemical Engineering Journal 183 N scie scopus 000880650700003 Biotechnology & Applied Microbiology Engineering, Chemical Biotechnology & Applied Microbiology Engineering Article WASTE-WATER TREATMENT PARTIAL NITRITATION-ANAMMOX SEWAGE-TREATMENT PLANT NITROGEN REMOVAL REJECT WATER START-UP REACTOR SCALE DIGESTION AERATION Single-stage Sidestream deammonification Overcoming strategies ANAMMOX Field experience