Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads
Lactic acid has been widely used in numerous applications, for example in food industry, pharmaceutical, cosmetics and production of biodegradable plastic. Worldwide production of lactic acid is mostly through the fermentation of lactic acid bacteria. However, during the food processing stages, t...
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| Format: | Article |
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SSM International Publication, India
2008
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| _version_ | 1825910409745399808 |
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| author | Rusmin, Ruhaida Zakaria, Zainora |
| author_facet | Rusmin, Ruhaida Zakaria, Zainora |
| author_sort | Rusmin, Ruhaida |
| collection | ePrints |
| description | Lactic acid has been widely used in numerous applications, for example in food industry,
pharmaceutical, cosmetics and production of biodegradable plastic. Worldwide
production of lactic acid is mostly through the fermentation of lactic acid bacteria.
However, during the food processing stages, the lactic acid bacteria face inhibition
problems caused by contaminants. Therefore, immobilization of lactic acid bacteria by
entrapment within polymer matrix was selected to minimize this problem. In this study,
lactic acid bacteria were immobilized in chitosan which is a biopolymer derived from the
deacetylation of chitin. The chitosan beads were prepared by dropping chitosan solution
in sodium pyrophosphate. The effect of modifications of chitosan beads by adding
polyvinyl alcohol (PVA) and crosslinking with glutaraldehyde (Glu) in strengthening the
beads for the fermentation process were studied. Modification of beads with PVA and
Glu to enhance their mechanical strength showed positive result. Comparing the
different types of beads, the Chitosan-Glu beads were found to maintain its shapes after
the second cycle of fermentation, but produced the lowest amount of lactic acid, which is
315 x 10-3 g /L |
| first_indexed | 2024-03-05T18:16:38Z |
| format | Article |
| id | utm.eprints-9948 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T18:16:38Z |
| publishDate | 2008 |
| publisher | SSM International Publication, India |
| record_format | dspace |
| spelling | utm.eprints-99482017-10-23T11:21:31Z http://eprints.utm.my/9948/ Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads Rusmin, Ruhaida Zakaria, Zainora Q Science (General) Lactic acid has been widely used in numerous applications, for example in food industry, pharmaceutical, cosmetics and production of biodegradable plastic. Worldwide production of lactic acid is mostly through the fermentation of lactic acid bacteria. However, during the food processing stages, the lactic acid bacteria face inhibition problems caused by contaminants. Therefore, immobilization of lactic acid bacteria by entrapment within polymer matrix was selected to minimize this problem. In this study, lactic acid bacteria were immobilized in chitosan which is a biopolymer derived from the deacetylation of chitin. The chitosan beads were prepared by dropping chitosan solution in sodium pyrophosphate. The effect of modifications of chitosan beads by adding polyvinyl alcohol (PVA) and crosslinking with glutaraldehyde (Glu) in strengthening the beads for the fermentation process were studied. Modification of beads with PVA and Glu to enhance their mechanical strength showed positive result. Comparing the different types of beads, the Chitosan-Glu beads were found to maintain its shapes after the second cycle of fermentation, but produced the lowest amount of lactic acid, which is 315 x 10-3 g /L SSM International Publication, India 2008-12 Article PeerReviewed Rusmin, Ruhaida and Zakaria, Zainora (2008) Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads. Asian Chitin Journal, 4 . pp. 19-28. ISSN 0973-3345 http://asianchitinjournal.org/main/?p=109 |
| spellingShingle | Q Science (General) Rusmin, Ruhaida Zakaria, Zainora Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads |
| title | Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads |
| title_full | Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads |
| title_fullStr | Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads |
| title_full_unstemmed | Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads |
| title_short | Production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads |
| title_sort | production of lactic acid by immobilized lactic acid bacteria in modified chitosan beads |
| topic | Q Science (General) |
| work_keys_str_mv | AT rusminruhaida productionoflacticacidbyimmobilizedlacticacidbacteriainmodifiedchitosanbeads AT zakariazainora productionoflacticacidbyimmobilizedlacticacidbacteriainmodifiedchitosanbeads |