Biography
BuÄŸra DAYI has completed his license degree. He studies at Pamukkale University, Department of Chemistry, Biochemistry subdivision as a master student. He works Environmental biotechnology, Waste water bioremediation and Dye removal.
Abstract
Wastewater from the textile industry is one of the most problematic to treat due to its color, high chemical oxygen demand (COD), biochemical oxygen demand (BOD), suspended solids, turbidity and toxic compounds. The chemical composition of the textile effluents has changed rapidly due to a shift in the consumer preferences, the most significant of these being the popularity of cotton fabrics and bright colors leading to greater usage of synthetic reactive dyes and azo dyes[1,2]. By far the single class of micro-organisms most efficient in breaking down synthetic dyes is the white-rot fungi. These fungi constitute a diverse eco-physiological group comprising mostly basidiomycetous and to a lesser extent litter-decomposing fungi capable of extensive aerobic lignin depolymerisation and mineralisation. The mechanism of fungal decolorization mainly involves two aspects, biodegradation and biosorption. The biodegradation capability of fungi is due to their extracellular, non-specific and non-selective enzyme system[3].rnIn our experience, white rot fungus M. esculenta was immobilized on to three different support materials (polyurethane, kaolin, cellulose). Biodecolorization of mixed dyes were investigated and the data were compared for all immobilized cells. Polyurethane was selected as immobilization support material for the best dye removal (dye concentration: 10 mgL-1, 97,78%) in agitated system. At the end of the biodecolorization, samples (10 mgL-1) was analyzed to FT-IR and UV spectrum for identify any possible metabolites. When the obtained datas were examined, any metabolites was not found. As a result, immobilized M.esculanta (on to Polyurethane) could be used the wastewater bioremediation.
Biography
Hatice A Akdogan has completed her PhD and works at the Pamukkale Umiversity in the Department of Chemistry, Biochemistry subdivision as an Associate Professor. She studies Environmental Biotechnology, Water and Soil Bioremediation, Chromatographic Monitoring of some organic contaminants during microbial biodegradations, microbial enzymes and their roles.
Abstract
The utilization of immobilized cells has shown potential in several bioprocesses including wastewater treatment. Immobilization can be considered as the natural state for several microorganisms; for example, most fungi tend to attach firmly to natural surfaces. Therefore, it is not surprising that artificially immobilized microorganisms can produce extracellular secondary metabolites. In industrial operations, immobilized microbial cell systems could provide additional advantages over freely suspended cells such as simple reuse of the biomass, easier liquid-solid separation and minimal clogging in continuous-flow systems. The immobilization of microorganisms can be defined as any technique that limits the free migration of cells. Basically, there are two types of cell immobilization: entrapment and attachment. In the former, the organisms trapped within the interstices of fibrous or porous materials are physically restrained by a solid and porous matrix. Our research focused on the immobilization of Coprinus plicatilis on kaolin, Ca-alginate and gelatin. 3 or 4 age cells and different amount of cells were used for immobilization studies. To the best of our knowledge, the results showed that gelatin was chosen as a support material because it is a natural material with a higher immobilization capacity and is less expensive.