processes were always essential. In the present study, addition of
SVH containing 40 g l1 initial RS decreased the inhibitors content
in the WSH, thus decreasing the toxicity of the WSH on the T. fermentans
and causing the enhanced lipid production. Additional
nutrients such as mineral salt, yeast extract and peptone were generally
indispensable prior to the fermentation using the hydrolysates
previously reported (Chen et al., 2012). However, nutrients
addition is unnecessary in the co-fermentation system here, since
SVH would provide the yeast with sufficient nutrients. Therefore,
it could be proposed that co-fermentation of SVH and WSH is an
excellent strategy for less-cost and efficient lipid production using
sweetpotato vines as a raw material.