555 and 881 L/kg VS fed [5]. In the case of anaerobic digestion
of fruit and vegetable wastes using sequencing batch reactor resulted
in 320 L of CH4/kg of chemical oxygen demand (COD)
fed [6]. While the anaerobic digestion of fruit waste consisting
of apple, corn cobs, apple press cake, extracted sugar beet pulp
and pineapple yielded 0.429–0.568 L biogas/g of total volatile
solids fed with a methane content of 50–60% [7]. Whereas, in
the case of anaerobic digestion of fruit and vegetable waste
consisting of mango, pineapple, tomato, jackfruit, banana and
orange resulted in 0.6m3 biogas/kg of volatile solids fed at a
hydraulic retention time (HRT) of 20 days [8]. The acidogenic
complete stirred tank reactors (CSTRs) and methanogenic
inclined tubular digester when operated with a substrate comprising
a mixture of activated sludge, fruit and vegetable wastes
at a loading rate of 5.7kgVSm−3 d−1 for a HRT of 13 days
at 30 ◦C, resulted in a biogas yield of 0.37m3/kg VS with a
methane content of 68% [9]. The anaerobic co-digestion of
primary sludge with a mixture of fruit and vegetable wastes
resulted in 0.6–0.8 L of biogas/gVS destroyed [10]. While
anaerobic degradation of fruits and vegetables was investigated
using two-phase anaerobic digester. The results showed that
in the absence of extraneous inoculum the biogas generation
occurred after 33 days, whereas using pig manure as inoculum