Performance of invertase immobilized on glass–ceramic supports in batch bioreactor

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 187; pp. 341 - 350
• Main Authors: Albertini, A.V.P., Cadena, P.G., Silva, J.L., Nascimento, G.A., Reis, A.L.S., Freire, V.N., Santos, R.P., Martins, J.L., Cavada, B.S., Neto, P.J. Rolim, Pimentel, M.C.B., Martínez, C.R., Porto, A.L.F., Lima Filho, J.L.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 01-04-2012; Elsevier
• Subjects: absorption; Applied sciences; beta-fructofuranosidase; Biological and medical sciences; Bioreactors; Biotechnology; Chemical engineering; coal; Coal fly ashes; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Glass–ceramic supports; glutaraldehyde; Immobilization; Invertase; magnesium; Methods. Procedures. Technologies; Others; porosity; pyrrolidones; Reactors; scanning electron microscopes; Sintering, pelletization, granulation; Solid-solid systems; stearic acid; sugars; temperature; Various methods and equipments; GCSPb; Glass–ceramic supports; Ad; GCSZn; Ucs; Invertase; Immobilization; Awa; PVP; XRD; GCSC; XRF; Ap; GCS; 3-APTES; Mimm; Mdry; SEM; Performance; Msat; CFA; Coal fly ashes; Reuse; Compressive strength; Density; Additive; Bioreactor; Batchwise; Sintering; Coal; Production; Water absorption; Porosity; Glass-ceramic supports; Factorial design; Glass ceramics
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2012.01.091

► The new support from coal fly ashes added with organic and inorganic additives. ► The temperature factor was the most important to obtain glass–ceramic supports. ► The SEM analysis showed cenospheres preservation important to coupling proteins. ► An economical protocol was obtained to prepare derivative for invert sugar. ► The support can be a viable alternative to reduce environmental pollution.
Invertase was covalently immobilized on glass–ceramic support (GCS) obtained from coal fly ashes (CFA) with polyvinyl pyrrolidone (PVP) and magnesium stearate added as temporary additive. The GCS samples containing Pb(CH3COO)2, (GCSPb) or ZnSO4 (GCSZn) were obtained in several sintering temperatures (1000–1200°C) and times (1–3h). The apparent values of porosity, water absorption, density and uniaxial compressive strength were studied by factorial design and morphological differences by scanning electron microscope. The best covalent immobilized invertase derivative was on GCSZn (1200°C/1h) with 4398±59.75U/g GCS. However, 95.83% of immobilized invertase activity was obtained using an economical protocol with concentration of 0.636mM 3-aminopropyltriethoxy silane (3-APTES) and 0.576mM glutaraldehyde. The GCSZn-invertase derivative retained 100% of initial activity after nine reuses (5476.19±155.49U/g GCSZn). The CFA showed to be a promising biotechnological alternative as immobilization support for production of invert sugar and may be for other industrial enzymes.