Biological treatment of sulphate-rich wastewaters\nemploying dissimilatory sulphate reducing bacteria as\nremedial agents is an attractive technique and has gained\nimportance in the last few years. Industrial effluents enriched\nwith sulphates are generally deficient in electron\ndonors. And thus cannot be treated biologically without\nsupplementation of carbon through an external source. For\nscalable operations, however, the carbon source must not be\nexpensive. In this context, present study reports the efficiency\nof biological sulphate reduction using sugarcane\nbagasse as a cost-effective carbon source. An average\n0.00391 �± 0.001 gL-1 day-1 (3.91 mgL-1 day-1) sulphate\nreduction was observed reaching maximally to 0.00466 �±\n0.001 gL-1 day-1 (4.66 mgL-1 day-1) while employing\nDesulfovibrio fructosovorans-HAQ2 and Desulfovibrio piger-\nHAQ6 in a 60-day trial of anaerobic incubation using\nsugarcane bagasse as growth substrate. These findings will\nbe helpful in developing economical bioremediation processes\ntending to operate for a longer period of time to\nreduce sulphate contents of contaminated waters.
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