ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Immobilization of cells by attachment to alginate gels

L. Pach, V. Báleš, I. Langfelder, and F. Malík

Department of Chemical Technology of Silicates, Faculty of Chemical Technology. Slovak Technical University. CS-81237 Bratislava

Abstract: Modified Ca-alginate gels (containing gel 0.2 CaO Si0₂, CaS0₄, hydroxyethylcellulose) with immobilized yeast S. cerevisiae show higher biocatalytical activity in the production of alcohol by about 50 %, as well as better mechanical strength (by 15 %), when used in a reactor with static layer of catalyst. The gel 0.2 CaO•Si0₂ is formed by ionotropic gelation of the colloidal Si0₂ (a component of the alginate dispersion) by calcium ions in the CaCl₂ solution. The 0.2 CaO•Si0₂+CaS0₄ gel represents an internal Ca source of the biocatalyst, enhancing thus its stability.

Full paper in Portable Document Format: 435a643.pdf

Chemical Papers 43 (5) 643–650 (1989)