Table 1.

Chemical–physical characterization of feedstock (standard deviations for triplicates are shown in parentheses)

Parameters	Unit	Maize + Alfalfa + Spent wash + Pig manure
pH	–	5.64 (± 0.07)
Alkalinity	mval/L	65.75 (± 4.79)
	mg CaCO3/L	3287.5 (± 239)
Volatile fatty acids (VFAs)	mg/L	3,034 (± 202.8)
COD	mg O2/L	31,471 (± 2,929)
Ammonia	mg N–NH4 +/L	576.8 (± 40.45)
TS	g/kg	99.73 (± 4.56)
VS	g/kg	90.98 (± 4.14)