Effect of cycle period and substrate composition on phosphorous removal potential of a laboratory-scale sequencing batch reactor

Gargi Biswas, Anupam Debsarkar, Somnath Mukherjee, Siddhartha Datta, Sunil Kumar and Ackmez Mudhoo

International Journal of Environmental Technology and Management, 2011, vol. 14, issue 1/2/3/4, 252-268

Abstract: The performance of a laboratory-scale sequencing batch reactor (SBR) of 20-litre capacity was evaluated for simultaneous removal of soluble COD (SCOD), NH₄⁺–N and phosphorus by changing the compositions and concentrations of substrates under different combinations of REACT period. The total cycle period of 10 h comprised 0.5 h FILL period, 8 h REACT period, 1 h SETTLE period and 0.5 h IDLE/DRAW period with the react period being divided into two combinations of anoxic (A) and aerobic (O) react period namely (4 h + 4 h) (A/O) and (3 h + 3 h + 2 h) (A/O/A). The initial SCOD concentration was kept constant at 2000 mg/l while the initial NH₄⁺–N concentrations were taken as 90 mg/l and 180 mg/l as N tentatively. Results for total phosphorus accumulation capacity indicated that the A/O/A combination was more conducive to total phosphorus uptake at 90.26 mg P/g MLVSS than the A/O combination in the aerobic reaction period which followed the initial 3-h anoxic react period.

Keywords: sequencing batch reactors; cycle period; phosphorus removal; environmental technology; substrate composition; wastewater treatment. (search for similar items in EconPapers)
Date: 2011
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