Effect of cycle period and substrate composition on phosphorous removal potential of a laboratory‐scale sequencing batch reactor
Source: International Journal of Environmental Technology and Management, Volume 14, Numbers 1-4, March 2011 , pp. 252-268(17)
Publisher: Inderscience Publishers
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.
Document Type: Research Article
Affiliations: 1: Department of Civil Engineering, Jadavpur University, Kolkata 700 032, India. 2: National Environmental Engineering Research Institute (NEERI), Council of Scientific and Industrial Research (CSIR), I-8, Sector 3: C
Publication date: 2011-03-01
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