Title: Performance evaluation of a shaft-type hybrid bioreactor for the removal of carbonaceous organic matter

Authors: Subrata Hait; Debabrata Mazumder

Addresses: Environmental Engineering and Management Programme, Department of Civil Engineering, Indian Institute of Technology, Kanpur, Uttar Pradesh – 208 016, India ' Department of Civil Engineering, Bengal Engineering and Science University, Shibpur, P.O.- Botanic Garden, Howrah, West Bengal – 711 103, India

Abstract: In comparison to an activated sludge process, the organics removal performance of a lab-scale hybrid bioreactor of volume 14.5 L was studied using waste automobile tyre-tube beads as bio-carrier. Batch study was performed using synthetic wastewater with soluble chemical oxygen demand (COD) ranging between 1000-3500 m/L for a period up to 9 h under purely suspended growth as well as hybrid condition with bio-carrier concentrations in the range of 10-30 g/L of reactor volume. Hybrid condition showed significant improvement in biomass settleability and organics removal with average COD removal efficiency of 89.6% as compared to 70.6% under purely suspended growth condition.

Keywords: activated sludge; deep-shaft reactors; suspended growth system; hybrid bioreactors; wastewater treatment; carbon oxidation; performance evaluation; carbonaceous organic matter; automobile tyres; tyre tube beads; biocarriers; chemical oxygen demand; COD.

DOI: 10.1504/IJEE.2012.050803

International Journal of Environmental Engineering, 2012 Vol.4 No.3/4, pp.337 - 351

Published online: 31 Dec 2014 *

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