Bioconvertion of spent cellulose sausage casings
نویسندگان
چکیده
Cellulose sausage cellulose casings are used extensively in the manufacture of sausages in meat packaging. After stripping the meat, spent asings mainly contain cellulose and residual meat juice with salt, nitrate and nitrite. Disposal of spent sausage casings has serious economic nd environmental concerns for the sausage industry. This work describes bioconversion of spent cellulose casings (SCC) into enzymes, lactic cid and ethanol by using cellulolytic fungi, lactobacillus and yeasts. The solid substrate cultivation (SSC) of Trichoderma reesei RUT C-30 on CC and blends gave a maximum of 152 filter paper cellulase (FPase) activity and about 100 carboxymethylcellulase activity (CMCase)/g dry eight substrate. The SSC produced enzyme-rich casing with 50 FPase when directly mixed as such with 10% fresh SCC produced over 70 g/l actic acid using Lactobacillus plantarum sp. 14431, and also produced 30 g/l ethanol with Kluveromyces marxianus IMB-3 under simultaneous accharification and fermentation (SSF) conditions. 2007 Elsevier Inc. All rights reserved.
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