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In late 1990s, it was found that the biogas with enhanced hydrogen content is possible from organic wastes. This was achieved by a biological process by employing a consortium of bacteria to generate hydrogen from distillery effluent.

Following the successful demonstration at the pilot-scale, biohydrogen production facility at the industrial scale was created in the premises of EID Parry, Nellikuppam, Cuddalore district to treat 100m3 distillery spent wash by a consortium of bacteria. This process significantly reduced the oxygen demands (BOD & COD) of the wastewater and generated nearly 18 m3 of biogas having 60% hydrogen content.