Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction

Table 3

Characteristics of starting and ending mixtures of PLA (treated or untreated), food waste, and ADS.

Characteristics	Initial		Final
	Treated	Untreated	Treated	Untreated
TCOD (g/L)	38.2 ± 2.2	27.8 ± 0.7	10.6 ± 0.5	10.2 ± 0.7
SSCOD (g/L)	12.3 ± 2.8	3.4 ± 0.8	0.1 ± 0.0	0.7 ± 0.5
TS (g/L)	5.7 ± 0.7	7.7 ± 0.9	0.1 ± 0.0	N/A
VS (g/L)	3.3 ± 0.5	2.5 ± 0.2	0.0 ± 0.0	N/A
VS : TS	0.6 ± 0.2	0.3 ± 0.0	0.0 ± 0.0	N/A
pH	7.1	7.4	8.9	8.7

The untreated TS, VS, and VS : TS were not performed due to the size of PLA in solution.