title: Respirometric monitoring for the determination of effective height and reaction rate constant in up-flow autotrophic denitrification reactor packed with sulfur.
abstract: A novel technology for the removal of nitrogen from wastewater, autotrophic denitrification process with sulfur particle, has been developed. A respirometer was employed for the monitoring of nitrogen gas produced in the reactor. It was found that the autotrophic denitrification studied by gas production rate and nitrate depletion rate followed a first order reaction from the relationship. The reaction rate constant based on effective volume, k(N) was ranged from 2.67 to 3.07 h(-1). The effective height was around 23.8 and 50% of the total height for 11.8 and 5.9 h of packed bed contact time, respectively. It was assumed that the reaction rate constants were similar in each experimental condition, PBCT = 11.9 and 5.9 h because there was little gradient of biomass concentration within 50% of the total height. The respirometry was found to be a simple and fast way to monitor the denitrification process. The method was especially useful for the determination of kinetic parameters.
authors.affiliation: Bio-Environmental Engineering Laboratory (BEEL), Department of Environmental Science and Engineering, Kwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju, Republic of Korea. iskim@kjist.ac.kr
authors.forename: In S
authors.initials: IS
authors.lastname: Kim
authors.forename: Wooshin
authors.initials: W
authors.lastname: Park
mesh_terms: D007700:Kinetics; D009573:Nitrites / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
chemical_list: D009573:Nitrites; D013455:Sulfur