Improvement of Bacterial Cellulose Production by Addition of Agar in a Jar Fermentor

Effect of addition of sodium alginate on bacterial cellulose production by Acetobacter xylinum

“…Although other polymeric additives such as xanthan, agar, acetan were investigated to hinder formation of large clumps of BC and enhance BC production in either jar fermentor or airlift reactor, there are remarkable diVerences in BC enhancing extent according to diVerent strains, additives and additives concentration [1,3,9]. Bae et al [1] reported that the maximum BC production of A.xylinum BPR2001 at 0.4% (w/v) agar was 12.8 g/l compared with xylinum NUST4.1 in the medium containing NaAlg in the shake Xask.…”

“…Bae et al [1] reported that the maximum BC production of A.xylinum BPR2001 at 0.4% (w/v) agar was 12.8 g/l compared with xylinum NUST4.1 in the medium containing NaAlg in the shake Xask. a 0% and b 0.04% NaAlg 8 g/l without agar and the mutant EP1, generated from A.xylinum BPR2001 produced 11.6 g/l of BC at 0.6% agar, while only 5.5 g/l was produced in the control in a 10 l stirred-tank reactor.…”

“…The unique properties of bacterial cellulose including high purity, high crystallinity, high mechanical strength, high water-holding capacity, good biocompatibility and high porosity have made BC a very potentially important industrial and biomedical material [1].…”

“…Recently there are a few reports stating that addition of water-soluble polymers such as xanthan, agar, polyacrylamide-co-acylic acid (PCA), and acetan can increase relative viscosity of the broth to reduce shear stress, hinder coagulation of BC during the cultivation to form uniform smaller pellets, which are advantageous to transfer nutrients and oxygen into bacterial cells located inside and on the surface of the cellulose matrix, and further promote BC productivity into the medium, will assist in enhancing BC productivity [1,3,9,10]. On the other hand, various watersoluble polymers added into the medium are known to interfere with the aggregation of microWbrils into a normal ribbon assembly, aVect the crystallization of cellulose I and I and introduce the characteristic properties of these additives to attain BC composite materials [6].…”

Pineapple agroindustrial residues for the production of high value bacterial cellulose with different morphologies

“…Conventional sources based on carbon and other nutrients (sugars such as glucose, fructose, and sucrose) are used for microbial fermentation. [9][10][11] Recently, unconventional carbon sources based on alternative substrates, in particular agroindustrial wastes, with low cost and reduced environmental impact have been investigated to produce high value BC. [12][13][14][15][16][17][18] Sugar cane and pineapple wastes are particularly interesting due to they are rich in carbon source and other nutrients, making it attractive for fermentation.…”