TABLE 2.

Maximum specific substrate-degrading activities at 10°C of inoculum and the EGSB sludge

Time	Maximum specific substrate-degrading activity (g of COD g of VSS−1 day−1)a
	Propionate	Butyrate	VFA mixture
Day 0	0.097 (0.007)	0.053 (0.001)	0.106 (0.000)
1st stage
Day 48	0.082 (0.000)	0.056 (0.006)	0.140 (0.005)
Day 152	0.093 (0.017)	0.139 (0.001)	0.214 (0.002)
2nd stage
Day 48	0.111 (0.008)	0.068 (0.002)	0.143 (0.002)
Day 152	0.110 (0.000)	0.112 (0.009)	0.205 (0.002)

^aStandard deviations are presented in parentheses.