Co-production technology of rice protein and ethanol from early indica rice

The preparation of rice protein from early indica rice and ethanol fermentation using residues, as well as the effects of alkali solution concentration, the ratio of stuff to alkali solution, extraction time and temperature on the extraction of rice protein are discussed. Results show that the preferable technical conditions of the rice protein extraction are as follows: alkali solution concentration 0.05 mol/L, the ratio of stuff to alkali solution 1∶4, extraction time 2 h, temperature 30℃. The purity and extraction rate of rice protein under these conditions are 94.9% and 52.4% respectively. When 25%(w/w) corn flour is added in the residue, the conditions of ethanol fermentation are good, and the fermentation time is 45 h, alcoholicity is 12.78% and the remainder reducing sugar is 0.13%.