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DOI: https://doi.org/10.4491/eer.2018.390
Kinetic modeling of organic and nitrogen removal from domestic wastewater in a down-flow hanging sponge bioreactor
Dinh Thi Nga1, Nguyen Trung Hiep2, and Nguyen Tri Quang Hung2
1Research Institute for Sustainable Development, Hochiminh City University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Hochiminh City, Vietnam
2Faculty of Environment and Natural Resources, Nong Lam University – Hochiminh City, Linh Trung Ward, Thu Duc District, Hochiminh City, Vietnam
Corresponding Author: Dinh Thi Nga ,Tel: +84979 902 124 , Email: dtnga@hcmunre.edu.vn
Received: November 5, 2018;  Accepted: March 23, 2019.
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ABSTRACT
A down-flow hanging sponge bioreactor was operated for the treatment of domestic wastewater. The Stover–Kincannon model was applied for kinetic evaluation of the reactor performance during the operational period. As a result, the coefficient of determination (R2) for straight lines of effluent concentration from the experimental data and from the predictive data of BOD5; NH4+-N; and TN were 0.9727; 0.9883; and 0.9934, respectively. The calculation of saturation value constant (Umax - g L-1 day-1) and maximum utilization rate constant (KB - g L-1 day-1) were 56.818 and 75.034 for BOD5; 2.960 and 4.713 for NH4+-N; 2.810 and 8.37 for TN, respectively. The study suggests that Stover–Kincannon model can be used for effective evaluation of kinetic removal of BOD5; NH4+-N; and TN from domestic wastewater treated in a DHS bioreactor.
Keywords: Domestic wastewater | Down-flow hanging sponge | Kinetic modelling | Removal efficiency | Stover-Kincannon model
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