Study on High-temperature and High-gravity Ethanol Fermentation of Cassava Starch

The technical conditions of high-temperature and high-gravity ethanol fermentation of cassava starch with the screened high-temperature resistance yeast as microbial species were investigated.And the optimum technical conditions were determined as follows through single factor test and orthogonal test:the ratio of raw materials to water was 1∶2, then after liquefaction and saccharification, the broth was cooled down to 37 ℃ and its pH value adjusted to 4.0, then 0.10 % urea added and the inoculation quantitiy was 5 %, then after 64 h fermentation, the highest al-cohol content could reach up to 15.54 %vol.