recorded an increase in VSS solubilisation of 40–50% and an
increase in methane production by greater than 200% over the control.
they Valo et al. [87] treated WAS at 170 C for 15 min in an autoclave
and recorded an increase in TS reduction of 59%, with 92%
higher gas production. While pre-treatment of WAS has been heavily
investigated, there is little literature regarding FOG
pre-treatment. One exception to this is an investigation conducted
by Li et al. [55] in which co-digested FOG and kitchen waste were
pre-treated thermochemically. Pre-treatment enhanced biogas
production by 9.9 ± 1.5% over the control.