Enhancing the Production of Polyhydroxyalkanoate Biopolymer by Azohydromonas Australica Using a Simple Empty and Fill Bioreactor Cultivation Strategy
Polyhydroxyalkanoates (PHAs) are biodegradable polymers which are considered as an effective alternative for conventional plastics due to their mechanical properties similar to the latter. However, widespread use of these polymers is still hampered due to their high cost of production. This shortco...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Croatian Society of Chemical Engineers
2018-01-01
|
| Series: | Chemical and Biochemical Engineering Quarterly |
| Subjects: | |
| Online Access: | http://silverstripe.fkit.hr/cabeq/assets/Uploads/12-4-17.pdf |
| Summary: | Polyhydroxyalkanoates (PHAs) are biodegradable polymers which are considered as an effective alternative for conventional plastics due to their mechanical properties similar to the latter. However, widespread use of these polymers is still hampered due to
their high cost of production. This shortcoming could partly be resolved by obtaining high yields and productivity. In the present study, a drain-and-fill strategy of repeated-batch cultivation was adopted for the enhanced production of polyhydroxybutyrate
PHB using Azohydromonas australica. In this strategy, 20 % (v/v) of the culture broth was removed from the reactor and supplemented with an equal volume of fresh medium.
This strategy demonstrated a 3.3 fold and 1.8 fold increase in PHB concentration and productivity, respectively, as compared to batch cultivation. Repeated cultivation had also the benefit of avoiding non-productive time required for cleaning, refilling and sterilization of bioreactor during batch, thereby increasing the overall volumetric productivity and industrial importance of the process. |
|---|---|
| ISSN: | 0352-9568 1846-5153 |