Abstract
Indonesia is one among countries that produce abundant of rice straw every year generated as post-harvesting residue from paddy field all over country. This abundant amount residue is highly potential to be utilized as carbon source in producing single cell protein (SCP) in solid state fermentation system. SCP is a microbial protein that can be used as alternative protein for substitution of available conventional protein sources such as; fish meal, soy bean, and corn Stover for animal feed production. This research was conducted to evaluating the effects of initial medium pH of substrate (mixed rice straw pulp-urea), fermentation time and fermentation temperature on SCP production by Trichoderma reesei in solid state fermentation (SSF). The results showed that the highest SCP yield (19.71%) was produced at the initial medium pH of 5 and temperature of 30 °C at SSF conditions of C/N ratio 20:1 for 12 days of fermentation time.
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