Pak, Dae Won 장원석 2024-01-13T14:01:13Z 2024-01-13T14:01:13Z 2021-09-29 https://pubs.kist.re.kr/handle/201004/107567 English ammonium ion exchanging media natural zeolite biofilter Effect of media characteristic on nitrifying bacterial population in biofilter Conference 1 Proceedings 3rd IWA International Specialised Conference on Microorganisms in Activated Sludge and B, pp.156 - 158 Proceedings 3rd IWA International Specialised Conference on Microorganisms in Activated Sludge and B 156 158 UK