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The digestion of instant coffee waste solids
1992
Marchaim, U. | Kostenberg, D. (Galillee Technological Center, Kiryat Shmona (Israel). Dept. of Biotechnology)
Decontamination and energetic supply in rural installations
1992
Carbonell, V. (Escuela Tecnica Superior de Ingenieros Agronomos, Madrid (Spain). Dept. de Fisica) | Bigeriego, M. | Delgado, M.
Combined anaerobic digestion of animal slurries and food industry liquid by-products
1992
Georgacakis, D. | Tsavdaris, A. (Agricultural Univ. of Athens (Greece). Dept. of Agricultural Engineering)
Energy production from biomass and wastes: present limitations and potential improvements
1992
Jewell, W.J. | Cummings, R.J. | Richards, B.K. (Cornell Univ., Ithaca, NY (USA). Dept. of Agricultural and Biological Engineering)
Influence of immobilization supports on the kinetic constants of anaerobic digestion of cheese whey
1992
Borja, R. (Instituto de la Grasa y sus Derivados, Sevilla (Spain)) | Martin, A. | Fiestas, J.A. | Duran, M.M. | Luque, M. | Colmenarejo, J.M.
Treatment of animal wastes and uses of treated residues
1992
Hobson, P.N. (Aberdeen Univ. (United Kingdom). Dept. of Molecular and Cell Biology)
Biogasification of solid residues from agriculture and agro-industry
1992
Weiland, P. | Ahlgrimm, H.-J.
Energy from crop-grown biomass
1992
Stewart, D.J. (Ministry of Agriculture and Fisheries, Dunedin (New Zealand). Invermay Agricultural Centre)
Some chemical aspects of melanoidin decolorization by Bacillus subtilis
1997
Rico, L.B. | Bugante, E.C. | Del Rosario, E.J. (Philippines Univ. Los Banos, College, Laguna (Philippines). Inst. of Chemistry)
The natural melanoidin from alcohol distillery biogester effluent and synthetic melanoidin, which was prepared in the laboratory from equimolar amounts of glucose and glycine were decolorized by Bacillus subtilis in shake flash culture. After eight days of fermentation at an initial bacterial level of 2.9 x 10 E 9 cfu/mL, natural melanoidin was 61.1 percent decolorized as measured by absorbance readings at 475 nm: the corresponding decolorization of 0.041 M synthetic melanoidin was 71.9 percent. Gel chromatography through Sephadex G-100 of natural melanoidin before and after microbial action showed molecular weight (MW) values of 35.6 and 33.5 kD, respectively; the corresponding MW values of freshly prepared and decolorized synthetic melanoidin were 42.6 and 37.7 kD, respectively. Values of the instrinsic viscosity, which is proportional to MW, of natural melanoidin before and after decolorization were 18.46 and 16.96 mL/g, respectively; corresponding viscosity values for synthetic melanoidin were 19.77 and 17.16 mL/g, respectively. After bacterial action both natural and synthetic melanoidins showed greater absorbance at 220-350 nm and lower absorbance at greater than 370 nm but showed reduced infrared intensities corresponding to C=O, C=C and O-H stretching vibrations; however the C-O infrared intensity increased. The results suggest partial depolymerization and oxidative degradation of both melanoidins caused by the microorganisms
Mostrar más [+] Menos [-]Aquaculture in warm brewery effluents: a way to upgrade the used waters, the waste-heat and by-products [fish culture, in Belgium with African catfish and European eel]
1993
Vriens, L. | Muylder, E. de (Seghers Engineering, Willebroek (Belgium)) | Eyben, D.
