Treatment of high strength wastewater in Sequencing Batch Bioreactors (SBBRS) using suspended and attached growth configuration. | [International Journal of Agriculture and Applied Sciences • 2012]

Author(s):

1. Beenish Saba: Department of Environmental Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan

2. Tariq Mahmood: Department of Environmental Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan

3. Bushra Zaman: Department of Environmental Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan

4. Azeem Khalid: Department of Environmental Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan

5. Sher Jamal Khan: Institute of Environmental Science and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad, Pakistan

Abstract:

Wastewater reclamation using cost effective technologies is a promising solution to meet stringent discharge standards. Present study illustrated wastewater treatment performance comparison of laboratory scale attach growth sequencing batch bioreactors (AGSBBRs) with two different bio-carriers taking suspended growth sequencing batch bioreactor (SGSBBR) as control. The removal of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) of polyurethane sponge and polystyrene suspended bio-carriers occupying 10% reactor volumes in AGSBBRs were determined. It was found that SGSBBR achieved the 97% ± 2 removal efficiency in 4 h hydraulic retention time (HRT). In case of AGSBBRs, the results showed 97% ± 2 and 98% ± 1 COD removal efficiencies with polyurethane while 97% ± 2 and 97.5% ± 1.2 for polystyrene at 4 h and 6 h HRT, respectively. The TN and TP removal efficiency was 69.7 ± 4% and 52 ± 4.8% in SGSBBR, 71 ± 0.17% and 51 ± 2.7% in polystyrene AGSBBR while 71.55 ± 0.67% and 58 ± 3.2% in polyurethane AGSBBR. It was concluded that enhanced performance with AGSBBR might be due to enforced anoxic/aerobic conditions in the inner layers of biofilm formed on bio-carriers which facilitated the required metabolic conditions for treating high strength wastewater.

Page(s): 1-7

DOI: DOI not available

Published: Journal: International Journal of Agriculture and Applied Sciences, Volume: 4, Issue: 1, Year: 2012

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