Inderscience Publishers

Treatment of distillery anaerobic effluent in a hybrid biological reactor

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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

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