Table 1.

Characteristics of food waste used to feed the phased digestion systems

Parameter	Unit	Value
Total solids	%	30.06 ± 0.68
Volatile solids	%	24.87 ± 0.54
VS/TS		0.93
TCOD	g/L	50.47 ± 13.84
TCOD/VS		2.00
SCOD	g/L	15.60 ± 0.60
TAN	mg/L	55.50 ± 8.90
pH		7.02 ± 0.22

Original food waste was diluted using tap water to achieve the target VS concentration for feeding the first-stage digesters

TAN total ammonia nitrogen