Simulated FVWs was used as substrate composing 57% water-melon, 29% apple and 14% potato by wet weight. After crushed
by a food waste disposer (produced by In Sink erator company,
Model 55, 410w) and fully mixed, the simulated FVWs was stored
at 20C in a refrigerator and the frozen FVWs was thawed at
4 C before use every day. Raw shredded FVWs were analyzed
more than ten times, and the initial total solids (TS) concentration
and volatile solids (VS) were approximately 100 g/kg and 87 g/kg,
respectively. The total COD (tCOD), soluble COD (sCOD) and
NH4
+
-N were 137.1, 79.3 and 0.07 g/kg, respectively, and the pH
was 4.5–4.8