Optimized remediation of anaerobically digested molasses spent wash from biogas plant and simultaneous production of lactic acid

Isolates of lactic acid bacteria were obtained by enrichment using anaerobically digested molasses spent wash (ADMSW), a dark brown colored effluent with high COD, obtained from biomethanation plant The isolates could grow in 25%,v/v ADMSW medium supplemented with 3% sucrose,4% moong bean sprouts (w/v) and 0.125% diammonium phosphate. In the fermentation process, the organic load in terms of COD was reduced by 55.2% with 67. 2% decolonization of the effluent. During the process, lactic acid was produced by the bacterial isolates with an average yield of 17.7 gL^-1 in 96 h fermentation.