• DOI:10.1002/biot.201800074
• Corpus ID: 4299689

Pilot Scale-up of Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) Production by Halomonas bluephagenesis via Cell Growth Adapted Optimization Process.

@article{Ye2018PilotSO,
  title={Pilot Scale-up of Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) Production by Halomonas bluephagenesis via Cell Growth Adapted Optimization Process.},
  author={Jianwen Ye and Wuzhe Huang and Dongsheng Wang and Feng Chen and Jin Yin and Teng Li and Haoqian M Zhang and Guoqiang Chen},
  journal={Biotechnology journal},
  year={2018},
  volume={13 5},
  pages={
          e1800074
        }
}

• Jianwen Ye, Wuzhe Huang, +5 authors Guoqiang Chen
• Published 1 May 2018
• Biology, Engineering
• Biotechnology journal

Poly(3-hydroxybutyrate-co-4-hydroxybutyrate), P(3HB-co-4HB), is one of the most valuable biopolymers because of its flexible mechanical properties. In this study, the goal is to establish a scaled-up process of low cost P(3HB-co-4HB) from a 7.5-L fermentor to 1- and 5-m3 industrial bioreactors, respectively, using Halomonas bluephagenesis TD40 grown on glucose, γ-butyrolactone, and waste corn steep liquor (CSL) as substrates, under open non-sterile and fed-batch or continuous conditions. The non-sterile process enables the energy reduction for less steam consumption. Moreover, waste gluconate is successfully utilized to replace glucose as a carbon source for cell growth and PHA accumulation in 7.5-L fermentor, which opens the possibility of 60% of raw material cost reduction for recycling the waste resources. A mathematical model and rational calculation is established to help guide the feeding strategy and scale-up, respectively, leading to 100 g L-1 cell dry weight (CDW) containing 60.4% P(3HB-co-mol 13.5% 4HB) after 36 h of growth in the 5 m3 vessel. An even higher P(3HB-co-4HB) content of 74% is achieved by decreasing the use of waste CSL. A stable and continuous open process for efficient low-cost production of P(3HB-co-4HB) is successfully developed coupling fermentation with the downstream extraction processing.