Jeong, Dawoon Lee, Chang-Ha Lee, Seockheon Bae, Hyokwan 2024-01-19T17:33:20Z 2024-01-19T17:33:20Z 2021-09-05 2020-05 0964-8305 https://pubs.kist.re.kr/handle/201004/118663 The effects of water permeation intensity on nitrifying bacterial activity, forward osmosis (FO) membrane performance, and bacterial community structure were investigated in an osmotic membrane bioreactor (OMBR). Ammonia was partially oxidized by controlling acidification buffer concentration. Then, the FO module was externally integrated with a nitrifying bioreactor to examine nitrifying bacterial activity in response to the increased salinity. The salinity gradually increased from 2.7 to 45.7 g.L-1 total dissolved solids (TDS). Inhibition of nitrite-oxidizing activity was initiated at a salt concentration of 36.2 g.L-1 TDS. Complete ammonia-oxidizing bacteria inhibition occurred at 45.7 g.L-1 TDS. Illumina high-throughput sequencing revealed that the bacterial community responded to the operational conditions such as the ammonia loading rate and salt concentration. Only two species, Nitrosomonas eutropha and Nitrobacter winogradskyi, were responsible for nitrification in the OMBR. The cellulose triacetate FO membrane showed poor rejection efficiencies for ammonia, nitrite, and nitrate. The FO module was capable to maximally recover 107.8% water in the OMBR. However, the water permeation intensity should be appropriately adjusted to avoid nitrification failure by maintaining the optimal salinity as lower than 35 g.L TDS, which is equivalent to water permeation efficiency of 107.8% in this study. English Elsevier BV MUNICIPAL WASTE-WATER OSMOSIS-MEMBRANE COMMUNITY STRUCTURE PHOSPHORUS SALINITY REMOVAL BIOFILM SYSTEM RECOVERY AMMONIA Nitrification stability and membrane performance under different water permeation intensity of an osmotic membrane bioreactor Article 10.1016/j.ibiod.2020.104962 1 International Biodeterioration & Biodegradation, v.150 International Biodeterioration & Biodegradation 150 scie scopus 000528555000008 2-s2.0-85083039081 Biotechnology & Applied Microbiology Environmental Sciences Biotechnology & Applied Microbiology Environmental Sciences & Ecology Article MUNICIPAL WASTE-WATER OSMOSIS-MEMBRANE COMMUNITY STRUCTURE PHOSPHORUS SALINITY REMOVAL BIOFILM SYSTEM RECOVERY AMMONIA Osmotic membrane bioreactor Water permeation intensity Salt concentration Nitrification Bacterial community structure