Kim, I. Lee, H. H. Chung, Y. C. Jung, J. Y. 2024-01-20T21:00:52Z 2024-01-20T21:00:52Z 2021-09-03 2009-09 0273-1223 https://pubs.kist.re.kr/handle/201004/132216 Biofilm and granule reactors were employed to remove nitrogen via an anammox reaction applying synthetic nitrogen wastewater, whose concentration was in the range of 20 to 1,400 mg N/L as total nitrogen. A biofilm reactor was packed with non-woven fabric and a granule reactor was filled with anaerobic granular sludge taken from the brewery wastewater treatment plant. Both reactors were seeded with Planctomycetes KSU-1 and operated for 450 days. The biofilm reactor showed high NH4+-N and NO2--N removal efficiencies of over 88% and 94%, respectively, until total nitrogen concentration was reached at 800 mg N/L. However, the biofilm reactor showed severe inhibition at over 1,000 mg N/L of total nitrogen due to nitrogen overloading. The granule reactor revealed better nitrogen removal performance than the biofilm reactor, showing high NH4+-N and NO2--N removal efficiencies of over 90%, even at a total nitrogen concentration of 1,400 mg N/L. However, aggregation of anammox bacteria grown in the sludge bed after long-term operation resulted in the deterioration of nitrogen. The removal ratio of NH4+-N and NO2--N was close to 1:1, suggesting other reactions related to ammonium oxidation could occur simultaneously. Free ammonia inhibition as well as NO2--N could be significant when high-strength nitrogenous wastewater was applied. English IWA PUBLISHING ANAEROBIC AMMONIUM OXIDATION SEQUENCING BATCH REACTOR MICROBIAL COMMUNITY BACTERIA DIVERSITY REMOVAL High-strength nitrogenous wastewater treatment in biofilm and granule anammox processes Article 10.2166/wst.2009.133 1 WATER SCIENCE AND TECHNOLOGY, v.60, no.9, pp.2365 - 2371 WATER SCIENCE AND TECHNOLOGY 60 9 2365 2371 scie scopus 000271936500018 2-s2.0-74049158636 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article ANAEROBIC AMMONIUM OXIDATION SEQUENCING BATCH REACTOR MICROBIAL COMMUNITY BACTERIA DIVERSITY REMOVAL anammox biofilm free ammonia granule nitrogen removal ratio