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Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules

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Bibliographic Details
Main Author: Nur Shahira, Mohd Nasir
Other Authors: Lee Boon Beng
Format: Learning Object
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2014
Subjects:
LAB fermentation
Lactic acid bacteria
Alginate capsule
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/37627
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spelling my.unimap-376272014-11-05T03:29:15Z Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules Nur Shahira, Mohd Nasir Lee Boon Beng LAB fermentation Lactic acid bacteria Alginate capsule Access is limited to UniMAP community. End-product inhibition in LAB fermentation has initiates the development of various approaches to minimize the inhibition effect on LAB growth. The inhibition effect can be minimized by controlling the pH in LAB fermentation. In this study, a novel method has been developed by encapsulating calcium carbonate (CaCO3) into alginate capsules. The capsules were produced by a simple dripping technique which is known as extrusion to control the pH during LAB fermentation. Capsules were formed by extruding the mixture of CaCO3, calcium chloride (CaCl2) and carboxylmethyl cellulose (CMC) through a needle into alginate solution containing sodium alginate and Tween 80. The diameter and membrane thickness of the capsules were varied to study their effects on growth kinetics of LAB. The studied parameters included pH, lactic acid concentration, glucose concentration and viable cell count. The use of capsules gave good pH control and the pH value was within the desired range of pH 4 to 7. High lactic acid production rate was also obtained when capsules with small diameter and thin membrane layer were used. The results showed that encapsulation of CaCO3 in alginate capsules is simple and the capsules are capable to control pH of LAB fermentation in order to improve the viable cell concentration and lactic acid production at the end of the fermentation. 2014-11-05T03:29:15Z 2014-11-05T03:29:15Z 2013-06 Learning Object http://dspace.unimap.edu.my:80/xmlui/handle/123456789/37627 en Universiti Malaysia Perlis (UniMAP) School of Bioprocess Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic LAB fermentation
Lactic acid bacteria
Alginate capsule
spellingShingle LAB fermentation
Lactic acid bacteria
Alginate capsule
Nur Shahira, Mohd Nasir
Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules
description Access is limited to UniMAP community.
author2 Lee Boon Beng
author_facet Lee Boon Beng
Nur Shahira, Mohd Nasir
format Learning Object
author Nur Shahira, Mohd Nasir
author_sort Nur Shahira, Mohd Nasir
title Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules
title_short Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules
title_full Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules
title_fullStr Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules
title_full_unstemmed Studies on the growth kinetics of lactic acid bacteria under controlled pH cultivation environment using alginate capsules
title_sort studies on the growth kinetics of lactic acid bacteria under controlled ph cultivation environment using alginate capsules
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2014
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/37627
_version_ 1643798525963665408
score 13.214268

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