Table 5

Production of solvents in packed bed biofilm reactors of C. acetobutylicum/C. beijerinckii

Culture/support

Maximum Solvent [gL^-1]

Maximum productivity

[gL^-1h^-1]

Accumulated biomass [gL^-1 reactor vol]

Biomass accumulation [gg^-1 support]

C. acetobutylicum

Bonechar

9.3 (0.30)

6.50 (1.5)

74.0

0.087

Glass beads

3.0 (0.31)

0.93 (0.31)

65.0

0.044

Glass wool

3.0 (0.10)

0.30 (0.10)

3.1

0.050

Polypropylene tow

2.3 (0.25)

0.58 (0.25)

0.8

-

Stainless steel wire balls

2.0 (0.07)

0.15 (0.07)

1.0

-

C. beijerinckii

Clay brick [Ref 38]

7.9 (2.00)

15.8 (2.00)

73.7

0.093

Numbers in bracket are dilution rates (h^-1) at which solvent and productivity were obtained

- Values not calculated

Qureshi et al. Microbial Cell Factories 2005 4:24   doi:10.1186/1475-2859-4-24