Effect of cellulase treatment of long fiber fraction on strength properties of recycled corrugated medium

İngilizce (OpenAlex)

Environmental pollution by organic compounds is a global problem. Biological treatment methods are \nused to restore polluted environments. Microbial immobilization on abiotic surfaces is a recent strategy \nto improve the efficiency of these processes. In this technique, cell adhesion is a fundamental step for \nsubsequent colonization and biofilm formation. Therefore, the use of strains with adhesive properties is \na critical factor for successful immobilization. In this work, culturable environmental microbial strains \nwere phenotypically characterized regarding their hydrophobicity, adhesion to polystyrene and \nproduction of exopolysaccharides and amyloid fibers. The cell retention was quantified by counting \nviable cells using polyurethane foam as material support. The degree of hydrophobicity varied from \nmoderately hydrophobic to hydrophilic, while the adhesion to polystyrene and production of \nexopolysaccharides and amyloid fibers ranged from strong to negative. The results of qualitative tests \nwere transformed into scores and a direct relationship between the qualitative characteristics and \nnumber of adhered cells on polyurethane foam was observed. The Gram-negative bacterium Serratia \nmarcescens and the yeast Candida rugosa showed the best results and were selected for further \nimmobilization tests.