“…100 liters of rennet casein whey (whey) was obtained from our pilot plant; the whey was prepared from 10 kg of lactic casein according to the method described elsewhere by Nishiya et at. 7 ) The whey was passed through a filter press (TFP-6-10, Tokyo Engineering) and then further filtered through a microfilter (Microsa PSU-3037; 0.1 J.1m pore size, Asahikasei) to remove the fine curds. Desalination of the filtrate was performed by reverse osmosis (RO; MR20, Mitsubishi Rayon Engineering, 15% rejection factor with sodium chloride).…”