Table 1.

Averaged effective diffusivities, external efficiencies and their standard deviations for A. terreus pellets of various sizes from various hours of cultivation

Experiment/mean pellet diameter D	Hour of cultivation (h)	Effective diffusivity D eff (μm2 s−1)a	External efficiency η e,m
#1 D = 3,700 (±400) μm	24	634 ± 94	0.93 ± 0.05
	48	1,164 ± 78	0.035 ± 0.005
	72	896 ± 47	0.0009 ± 0.0005
	96	887 ± 29	0.0009 ± 0.0004
	120	1155 ± 151	0.76 ± 0.18
	144	1342 ± 120	0.56 ± 0.34
#2 D = 6,200 (± 900) μm	24	993 ± 28	0.26 ± 0.05
	48	789 ± 45	0.29 ± 0.06
	72	850 ± 48	0.0009 ± 0.0005
	96	1,027 ± 150	0.60 ± 0.06
	120	824 ± 115	0.65 ± 0.06
	144	925 ± 142	0.33 ± 0.05
#3 1,400(±200) μm	24	985 ± 11	0.93 ± 0.03
	48	985 ± 20	0.97 ± 0.01
	72	909 ± 66	0.60 ± 0.05
	96	918 ± 120	0.92 ± 0.03
	120	1,691 ± 210	0.97 ± 0.04
	144	1,061 ± 123	0.98 ± 0.06

^athe values of effective diffusivities were less accurately determined for these pellets, in which low oxygen concentration was observed