Premium
Chitosan‐treated polypropylene matrix as immobilization support for lactic acid production using Lactobacillus plantarum NCIM 2084
Author(s) -
Krishnan Sudha,
Gowthaman M K,
Misra M C,
Karanth N G
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.406
Subject(s) - chitosan , polypropylene , lactobacillus plantarum , adsorption , lactic acid , lactobacillus casei , matrix (chemical analysis) , yield (engineering) , chemical engineering , chemistry , cationic polymerization , polymer , bioreactor , fermentation , nuclear chemistry , materials science , food science , chromatography , bacteria , polymer chemistry , organic chemistry , composite material , biology , engineering , genetics
Adsorption coupled with electrostatic interaction as an immobilization technique is an important microbial cell immobilization technique. Treatment of the polymer matrix with the cationic surface treating agent chitosan for lactic acid production has been studied. Cells of Lactobacillus plantarum NCIM 2084 were immobilized on a polypropylene (PP) matrix treated with different concentrations of chitosan. The biocatalyst adsorbed on the 1.0 g dm −3 chitosan‐treated PP matrix proved to be most effective. Repeated batch fermentation experiments showed that the immobilized biocatalyst could be recycled effectively 11 times. Studies were also carried out in a packed bed reactor with media recirculation. A high productivity of 7.66 g dm −3 h −1 could be obtained with a conversion of 94% and a yield of 97% at an average residence time of 30 h. © 2001 Society of Chemical Industry