Abstract:

In order to improve economic efficiency, recycled eggshell was used as raw materials to produce calcium propionate. In this study, propionic acid fermentation was carried through with the use of fibrous-bed bioreactor. Calcium was obtained at 35℃, 40 g/L glucose, fermentation 60 h. Take 5 g calcium oxide powder which was obtained by egg shells treated with crushed and calcined, and adding to 1 L fermentation liquor slowly. The reaction was processed 1 h at 35℃, and 8.56 g calcium propionate was obtained, the yield was 85.8%. This is an effective method, which has a satisfied yield.