Primary Treatment of Distillery Effluent, Anaerobic Digestion, Biological Oxygen Demand, Adoption, Biomethane, Methane

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	Primary Treatment Anaerobic digestion of effluents in lagoons reduces B.O.D. to an extent of 80-90%. This process has advantages of relatively low capital investment and ease of adoption and operation, but requires large of adoption and operation, but requires large area of land for lagoons.
Therefore, anaerobic treatment in closed digestor involving generation of biomethane gas is more suitable (methane can also be used as a fuel for domestic and incineration require high capital investment, so that this may not be techno-economically viable under India conditions. By primary treatment, BOD is brought down to 5,000-10,000 ppm, which is still too high for disposal, keeping the standards fixed (100 ppm for land and 30 ppm for water).