Sa. Shojaosadati et al., Bioconversion of molasses stillage to protein as an economic treatment of this effluent, RESOUR CON, 27(1-2), 1999, pp. 125-138
Citations number
22
Categorie Soggetti
Environment/Ecology,"Environmental Engineering & Energy
In this research study fungi isolated from effluent of ethanol factories we
re identified. Optimal conditions for single cell protein (SCP) production
and COD reduction of sugar beet stillage is specified for a species of Hans
enula in continuous culture. Under these conditions 5.7 g dm(-3) biomass wa
s produced and 31% of COD was reduced without addition of further nutrients
in beet molasses stillage. By addition of nitrogen and phosphorus sources,
biomass production and COD reduction increased to 8.5 g dm(-3) and 35.7%,
respectively. The crude protein content of SCP in the absence of additives
was 39.6% but this was increased to 50.6% in the presence of additives. The
amount of essential amino acids measured was greater than that of the refe
rence and are comparable with some other food proteins, such as soya bean a
nd fish meal. The final effluent of SCP production was recycled to fermenta
tion stage. The results represent 70% reduction of stillage volume. (C) 199
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