초록
<P><B>Abstract</B></P> <P>Planar Thermal Source (PTS) was used to separate ethanol from Solid-State Fermented crushed straw Material (SSFM) instead of the traditional separation method of water steam in Advanced Solid-State Fermentation technology (ASSF). Complete thermo gravimetric test was done on prepared material to study the mass change rules under heating of PTS. Factors considered were temperature of PTS (<I>T</I>, 20–100 °C), wet content of material (<I>θ,</I> 0.1–0.9), ethanol concentration in wet of material (<I>ω,</I> 0.03–0.11). The weight order of factors on material mass change speed <I>V</I> was <I>T</I> > <I>θ</I> > <I>ω</I>, and <I>ω</I> can be ignored for that was an order of magnitude less important than <I>θ</I> and <I>T</I>. <I>V</I> linearly increases with higher <I>T</I>, increases by power function with higher <I>θ</I>. <I>V</I> model with <I>T</I> and <I>θ</I> was regressed. As ethanol separating from SSFM can be considered as ethanol evaporating from ethanol solution, ethanol solution evaporation model was derived. Above all, model of ethanol separation from SSFM by PTS was derived. The cost model was added. Software was programmed to calculate the separation process and its cost. The method will promote the ASSF technology to produce fuel ethanol. The study can also be reference on drying process of other crushed plant material.</P> <P><B>Highlights</B></P> <P> <UL> <LI> It is much cheaper to use Planar Thermal Source (PTS) to separate ethanol from fermented straw instead of water steam. This can decrease the high cost in Advanced Solid-State Fermentation technology when producing fuel ethanol with straw. </LI> <LI> The PTS separation model and energy cost model were derived. The calculation software was programmed. It is very convenient to develop a detailed PTS separation process and equipment with the assistance of them. </LI> <LI> The ASSF profit increase first and then decrease as the evaporating process proceeds. It is not economic to totally evaporate the ethanol in SSFM. Function to calculate the most profitable duration was programmed into the software. </LI> </UL> </P>