Acetotrophic Activity Facilitates Methanogenesis from LCFA at Low Temperatures: Screening from Mesophilic Inocula

Table 4

Lag phase, maximum methane production rate, and methane yield with granular sludge and the municipal digester sludges from SDW and acetate in batch assays at 10 and 20°C.

Temperature (°C)	Substrate	Lag phase (, d)			Maximum methane production rate (, mL-CH4/d)			Methane yield (%)
		GS	RD	VD	GS	RD	VD	GS	RD	VD
20	Acetate	0	8.9	18.1
	SDW	0	4	51.1
10	Acetate	0.75	20.1	21.7					<1	<1
	SDW	1.5	22.9	20.9						<1