Title: Treatment of distillery anaerobic effluent in a hybrid biological reactor

Authors: Debabrata Mazumder, Somnath Mukherjee, Pradip K. Ray

Addresses: Civil Engineering Department, Bengal Engineering and Science University, Howrah 711103 (WB), India. ' Civil Engineering Department, Jadavpur University, Kolkata 700 032 (WB), India. ' Civil Engineering Department, Bengal Engineering and Science University, Howrah 711103 (WB), India

Abstract: The treatability of anaerobic effluent from a molasses-based distillery was studied in a shaft-type hybrid bioreactor under purely suspended growth and hybrid system containing 5 mm tyre-tube beads. The Ks, k, Y and k found as 111.29 mg/l, 0.026/h, 0.4607 and 0.0040/h respectively. The maximum COD removal was 51.7% at a loading rate of 5.250 kg d⁻¹ m⁻³. The overall removal rate was 0.0431, 0.0452, 0.0484 and 0.053/h under 0, 10, 20 and 30 g/l of beads respectively. When attached biomass increased, the cell synthesis part of oxygen utilisation coefficient gradually decreased and that for endogenous respiration increased.

Keywords: activated sludge; hybrid bioreactors; shaft-type bioreactor; tyre-tube beads; distillery wastewater; post-anaerobic effluent; wastewater treatment; pollution control; environmental pollution; molasses.

DOI: 10.1504/IJEP.2008.016897

International Journal of Environment and Pollution, 2008 Vol.32 No.1, pp.43 - 56

Published online: 28 Jan 2008 *

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