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6200510 
Journal Article 
BIOGAS FROM SOLID-WASTE ORIGINATED DURING BISCUIT AND CHOCOLATE PRODUCTION - A PRELIMINARY-STUDY 
Ranade, DR; Yeole, TY; Meher, KK; Gadre, RV; Godbole, SH 
1989 
Yes 
Biological Wastes
ISSN: 0269-7483 
Elsevier 
28 
2 
157-161 
WOS:A1989U321800008 
The solid waste originated during the biscuit and chocolate production was subjected to anaerobic digestion in a 180-litre capacity biogas plant of floating dome design. Three different hydraulic retention times (HRT), viz. 20, 30 and 40 days, were studied with 10% total solids in the influent slurry. The data collected showed that the waste is amenable to anaerobic digestion. The biogas produced was more at 40 days HRT, viz. 466 litres kg−1 waste added per day with 57% methane and 65% degradation in volatile solids. The anaerobic digestion at lower HRT, viz. 20 and 30 days, resulted in high VFA concentration and low pH of the fermenting slurry.