Co-digestion, which employs anaerobic digestion to treat two or more organic biodegradable waste streams, has a lot of promise for proper solid waste disposal. The anaerobic co-digestion of fruit and vegetable waste (FVW) and municipal sewage sludge (MSS) under mesophilic conditions was investigated and compared to separate digestion of the substrates. The continuous investigations were carried out at a 1.5 g VS/l.day organic loading rate and a 20-day HRT. It was discovered that FVW performed better than MSS. FVW addition, on the other hand, improved process stability by lowering the Volatile Fatty Acids (VFA) / Total Alkalinity (TA) ratio and increasing gas generation yield with its co-substrates. The specific gas production values for three reactors were: I 0.49 l/g VSin & 1.0 l/g VSdes for FVW, (ii) 0.261 l/g VSin & 0.643 l/g VSdes for MSS, and (iii) 0.613 l/g VSin & 1.078 l/g VSdes for FVW and MSS co- digesting. It has been established that co-digestion produces greater biogas. In terms of gas generation, reactor stability in co-digestion substrates, and buffering capacity, anaerobic co-digestion of FVW and MSS worked well. The anaerobic co-digestion of MSS and FVW is shown to be an appealing solution for environmental conservation and energy savings.
Author (S) Details
S. Anhuradha
Department of Chemical Engineering, Annamalai University, Annamalai Nagar – 608002, Tamil Nadu, India.
S. Arrrivukkarasan
Department of Chemical Engineering, Annamalai University, Annamalai Nagar – 608002, Tamil Nadu, India.
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