Lee, J. W. Lee, K. H. Park, K. Y. Maeng, S. K. 2024-01-20T19:04:54Z 2024-01-20T19:04:54Z 2021-09-01 2010-06 0960-8524 https://pubs.kist.re.kr/handle/201004/131431 Hydrogen dissolution and hydrogenotrophic denitrification performance were investigated in a lab-scale packed bed reactor (PBR) by varying the hydrogen flow rate and hydraulic retention time (HRT). The denitrification performance was enhanced by increasing the hydrogen flow rate and HRT as a result of high dissolved hydrogen concentration (0.39 mg/L) and utilization efficiencies (79%). In this study, the hydrogen-to-water flow rate ratio (Q(g)/Q(w)) was found to be a new operating factor representing the two parameters of hydrogen flow rate and HRT. Hydrogen dissolution and denitrification efficiency were nonlinearly and linearly correlated with the Q(g)/Q(w), respectively. Based on its excellent linear correlation with denitrification efficiency, Q(g)/Q(w) should be greater than 2.3 to meet the WHO's guideline of nitrate nitrogen for drinking water. This study demonstrates that Q(g)/Q(w) is a simple and robust factor to optimize hydrogen-sparged bioreactors for hydrogenotrophic denitrification. (C) 2010 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD WASTE-WATER AUTOHYDROGENOTROPHIC DENITRIFICATION DEPENDENT DENITRIFICATION BIOFILM REACTOR MEMBRANE REMOVAL GROUNDWATER GAS PH Hydrogenotrophic denitrification in a packed bed reactor: Effects of hydrogen-to-water flow rate ratio Article 10.1016/j.biortech.2010.01.022 1 BIORESOURCE TECHNOLOGY, v.101, no.11, pp.3940 - 3946 BIORESOURCE TECHNOLOGY 101 11 3940 3946 scie scopus 000275999800020 Agricultural Engineering Biotechnology & Applied Microbiology Energy & Fuels Agriculture Biotechnology & Applied Microbiology Energy & Fuels Article WASTE-WATER AUTOHYDROGENOTROPHIC DENITRIFICATION DEPENDENT DENITRIFICATION BIOFILM REACTOR MEMBRANE REMOVAL GROUNDWATER GAS PH Hydrogenotrophic denitrification Packed bed reactor (PER) Hydrogen flow rate Hydraulic retention time (HRT)