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利用乳清培养基生产乳品发酵剂的研究
Studies on preparation of dairy starter with whey-based medium
【摘要】 通过测试保加利亚乳杆菌和嗜热链球菌在乳清培养基中的生长能力,以期获得新型乳品发酵剂工业用培养基。试验结果表明:研制的pH值内控型乳清培养基缓冲能力强,增殖效果佳:嗜热链球菌经42℃培养3h后的活菌数达到0.29×109CFU/mL,培养6h后的活菌数达到0.42×109CFU/mL。在此基础上流加20%氨水恒定pH值,保加利亚乳杆菌和嗜热链球菌的活菌数达到了1.85×109CFU/mL和3.65×108CFU/mL,分别是不加缓冲液培养的7倍和3.5倍。
【Abstract】 The whey-based media used for growing L.bulgaricus and S.thermophilu was tested to obtain a new type industrial fermentation medium for preparing of dairy starter cultures.It proved that the internal pH control whey-based medium had desirable nutrition and buffer.After S.thermophilu was cultivated at 42℃ for 3 hours,cell population reached 0.29×109CFU/mL,the viable cells attained to 0.42×109CFU/mL after S.thermophilu was cultured for 6 hours.When provided with external pH control through addition of 20% anhydrous ammonia,viable cells population of L.bulgaricus and S.thermophilu reached 1.85×109CFU/mL and 3.65×108CFU/mL respectively,which was as much as 7 times and 3.5 times of the medium without phosphate.
- 【文献出处】 工业微生物 ,Industrial Microbiology , 编辑部邮箱 ,2007年06期
- 【分类号】TS252.1
- 【被引频次】6
- 【下载频次】270