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Optimization Removal of COD and Nitrogen at Different Hydraulic Retention Times in Biocord-Integrated Fixed-Film Activated Sludge Syste

Nguyen Thi Tuyet Nhi, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Phan Thi Thuy Van, Nguyen Thi Thao, Nguyen Thi Thanh Truc, Tran Le Truong Khanh Hung, Do Thi Ngoc Tay, Huynh Tan Nhut, Nguyen Trung Hiep, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam (+4 others)
2022 Environment and Natural Resources Journal  

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Although conventional activated sludge has been demonstrated to be a feasible approach for extracting nitrogenous chemicals and organic pollutants from wastewater, it still has a number of drawbacks. In this research, a pilot-scale biocord-integrated fixed-film activated sludge (Biocord-IFAS) reactor fed with actual domestic wastewater was operated to examine the effect of varying hydraulic retention time (HRT) on the COD and nitrogen removal. The type of material employed in this study is
more » ... us polypropylene (biocord), which is a major difference. The contribution of the Biocord-IFAS to COD removal efficiency reached 94.2% at HRT of 8 h and gradually decreased to 82.9% when HRT was reduced to 4 h. During the investigation period, a slight decrease in nitrification was found at a shorter HRT. The NH4+-N removal efficiencies at HRTs of 10, 8, 6, and 4 h were 97.8%, 98.7%, 97.1%, and 96.3%, respectively. The average effluent nitrate concentration was 5.3 mg/L with HRTs from 10 to 6 h, but over 30 mg/L with an HRT of 4 h. The SEM analysis results show that microorganisms have formed on the biocord surface. The results of this research have demonstrated the potential application of IFAS reactors in bioremediation procedures employing biocord material with great processing efficiency.
doi:10.32526/ennrj/20/202100254 fatcat:xloc2m3mirenffu7clqighpvra
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Nguyen Thi Tuyet Nhi, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Phan Thi Thuy Van, Nguyen Thi Thao, Nguyen Thi Thanh Truc, Tran Le Truong Khanh Hung, Do Thi Ngoc Tay, Huynh Tan Nhut, Nguyen Trung Hiep, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Faculty of Environment and Natural Resources, Nong Lam University-Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam, Research Institute for Sustainable Development, Ho Chi Minh University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Ho Chi Minh City 700000, Vietnam. "Optimization Removal of COD and Nitrogen at Different Hydraulic Retention Times in Biocord-Integrated Fixed-Film Activated Sludge Syste." Environment and Natural Resources Journal 20.4 (2022) 1-8