Nava I., Gaime Perraud Isabelle, Huerta Ochoa S., Favela Torres E., Saucedo Castaneda G. (2006). Penicillium commune spore production in solid-state fermentation of coffee pulp at laboratory scale and in a helical ribbons rotating reactor. Journal of Chemical Technology and Biotechnology, 81 (11), p. 1760-1766. ISSN 0268-2575.
Titre du document
Penicillium commune spore production in solid-state fermentation of coffee pulp at laboratory scale and in a helical ribbons rotating reactor
Nava I., Gaime Perraud Isabelle, Huerta Ochoa S., Favela Torres E., Saucedo Castaneda G.
Source
Journal of Chemical Technology and Biotechnology, 2006,
81 (11), p. 1760-1766 ISSN 0268-2575
Penicillium commune was grown on coffee pulp (CP) by solid-state fermentation (SSF). The effects of the duration of CP thermal treatment and the effects of incubation temperature on spore production yield were studied at laboratory scale. The effect of mixing during fermentation was assayed at pilot plant scale in a 70 L stainless steel non-aseptic reactor equipped with helical ribbons for mixing solids. For thermal treatments of CP at 121 degrees C for 10, 20, 30 and 40rnin, no significant difference in spore production yield was observed. Maximum sporulation yield was found at 25 degrees C; when the incubation temperature was higher than 30 degrees C, the sporulation yield decreased significantly. A spore production yield of 3.7 x 10(9) spores g(-1) dry CP was obtained when continuous mixing (0.25 rpm) was used at pilot plant scale; however, a decrease in spore yield (1.4 x 10(9) spores g(-1) dry CP) was observed under static conditions. Spore production was not affected when a scale factor between 79 and 105 was assayed from laboratory to pilot plant; at this level, the productivity obtained was 3.1 x 10(7) spores g(-1) dry CP h(-1). This value is similar to that found in other reports using natural substrates but working at a smaller scale. (c) 2006 Society of Chemical Industry.
