caa a22 4500 605501734 CHVBK 20210128100602.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00253-014-6163-z doi (NATIONALLICENCE)springer-10.1007/s00253-014-6163-z Enhancement of nuclease P1 production by Penicillium citrinum YL104 immobilized on activated carbon filter sponge [Elektronische Daten] [Nan Zhao, Hengfei Ren, Zhenjian Li, Ting Zhao, Xinchi Shi, Hao Cheng, Wei Zhuang, Yong Chen, Hanjie Ying] The efficiency of current methods for industrial production of the enzyme nuclease P1 is limited. In this study, we sought to improve fermentation methods for the production of nuclease P1. An immobilized fermentation system using an activated carbon filter sponge as a carrier was used for the production of nuclease P1. In an airlift internal loop reactor (ALR), the fermentation performance of three different fermentation modes, including free-cell fermentation, repeated-batch fermentation, and semi-continuous immobilized fermentation, were compared. The fermentation kinetics in the fermentation broth of the three fermentation modes, including dissolved oxygen (DO), pH value, cell concentration, residual sugar concentration, and enzyme activity, were tested. The productivity of semi-continuous immobilized fermentation reached 8.76U/mL/h, which was 33.3 and 80.2% higher than that of repeated-batch fermentation and free-cell fermentation, respectively. The sugar consumption of free-cell, repeated-batch, and semi-continuous immobilized fermentations was 41.2, 30.8, and 25.9g/L, respectively. These results showed that immobilized-cell fermentation by using Penicillium citrinum with activated carbon filter sponge in an ALR was advantageous for nuclease P1 production, especially in the semi-continuous immobilized fermentation mode. In spite of the significant improvement in nuclease P1 production in semi-continuous immobilized fermentation mode, the specific activity of nuclease P1 was almost equal among the three fermentation modes. Springer-Verlag Berlin Heidelberg, 2014 Penicillium citrinum nationallicence Activated carbon filter sponge nationallicence Immobilized fermentation nationallicence Nuclease P1 nationallicence Zhao Nan State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Ren Hengfei State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Li Zhenjian State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Zhao Ting State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Shi Xinchi State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Cheng Hao State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Zhuang Wei State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Chen Yong State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Ying Hanjie State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/3(2015-02-01), 1145-1153 0175-7598 99:3<1145 2015 99 253 https://doi.org/10.1007/s00253-014-6163-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00253-014-6163-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao Nan State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Ren Hengfei State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Li Zhenjian State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Ting State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Shi Xinchi State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Cheng Hao State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Zhuang Wei State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Chen Yong State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 700 1- Ying Hanjie State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 210009, Nanjing, People's Republic of China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/3(2015-02-01), 1145-1153 0175-7598 99:3<1145 2015 99 253