
Bacterial cellulose production with gluconoacetobacter xylinus from hazelnut vaste
Başlık:
Bacterial cellulose production with gluconoacetobacter xylinus from hazelnut vaste
Yazar:
Gazioğlu, Metehan, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
x, 54 leaves: illustrarions, charts; 29 cm + 1 computer laser optical disc.
Özet:
Bacterial cellulose (BC) is a natural biopolymer with significant potential in areas such as the biomedical, cosmetics, and electronics fields. BC features high surface area, permeability, biodegradability, and modifiability. This study used Gluconacetobacter xylinus to produce BC, optimizing various environmental conditions and media. The focus was on sugars obtained from hazelnut shells pretreated with acid and alkaline solutions. Chemical analysis of hazelnut shells showed lignin, cellulose, and hemicellulose contents of 42.09%, 21.84%, and 22.99%, respectively. Different pretreatments were evaluated for sugar release, with alkaline treatments being more effective. Pretreatment with 1% potassium hydroxide and 3% sodium hydroxide yielded the highest sugar concentrations at 37.8 and 39.0 g/L, respectively. Optimization involved examining inoculation rate, pH, duration, and ethanol presence. The highest BC yield (2369 mg/L) was achieved with 10% inoculation, 10 days, pH 6, and 1% ethanol concentration in the medium. Ethanol addition reduced water retention capacity. FT-IR results confirmed the purity and structural integrity of all samples. This study identified optimal conditions for BC production and demonstrated that hazelnut shells can serve as a sustainable sugar source.
Tüzel Kişi Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)-- İzmir Institute of Technology: Biotechnology
İzmir Institute of Technology: Biotechnology. (Master).
Elektronik Erişim:
Access to Electronic Versiyon.