Table 1.

Average amounts of methane formed and maximum methanogenesis rates per treatment across temperatures.

Temperature	Treatment	Average maximum CH4 amount measured (μmol)	% Expected CH4 accounted for	Maximum CH4 formation rate (nmol ∗ ml slurry-1 day-1)
4°C	Glucose	93.8 ± 27.5	46	1.9 ± 1.5
	Magnetite + Glucose	67 ± 5.8	32.9	1.9 ± 0.3
	Hematite + Glucose	163.1 ± 17.8	80	5.6 ± 0.6
10°C	Glucose	103.2 ± 17	50.6	83.5 ± 22
	Magnetite + Glucose	111.7 ± 16.3	54.8	79 ± 12.7
	Hematite + Glucose	136.3 ± 7.2	66.8	141.1 ± 36
30°C	Glucose	94.3 ± 8.8	46.2	179.2 ± 38
	Magnetite + Glucose	90.4 ± 2.2	44.3	180 ± 12.7
	Hematite + Glucose	114.7 ± 6.3	56.2	233.7 ± 4.2