N. Lark et al., PRODUCTION OF ETHANOL FROM RECYCLED PAPER SLUDGE USING CELLULASE AND YEAST, KLUVEROMYCES-MARXIANUS, Biomass & bioenergy, 12(2), 1997, pp. 135-143
Citations number
11
Categorie Soggetti
Energy & Fuels",Forestry,"Biothechnology & Applied Migrobiology
Paper recycling is expected to increase by an average of 10% annually
for the next few years. Likewise, the recycled paper sludge (RPS) gene
rated during repulping will increase accordingly. The typical RPS has
an average content of 60% moisture and 50% cellulose on a dry basis. S
imultaneous saccharification and fermentation (SSF) with fungal cellul
ase and yeast, Kluyveromyces marxianus, were used to convert cellulose
fibers of RPS samples to ethanol. The cellulase loading was 8 filter
paper units (FPU)/g dry RPS. About 32 and 35 g/l of ethanol were produ
ced from 180 and 190 g/l dry materials, respectively, after 72 h of in
cubation. This indicates that at least 72% of cellulose in the RPS was
converted into ethanol. During incubation, the thick slurry of RPS wa
s liquefied within 24 h, resulting in the reduction of water-holding c
apacity (WHC) of RPS to 30-35% of the original. (C) 1997 Elsevier Scie
nce Ltd.