Advances in Biotechnology. Proceedings of the Fifth by Graham G. Stewart

By Graham G. Stewart

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Extra info for Advances in Biotechnology. Proceedings of the Fifth International Yeast Symposium Held in London, Canada, July 20–25, 1980

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The physical properties of inulin solutions. , 95» Ul-UT. A. Frank (1966). Isotopic method for estimating microbial cell volume. , 92, 639-6U3. , and E. Stolpe (I96H). Studies on baker*s yeast. I. The carbohydrates of yeast and their changes on storage. Aboensis, 2UB: 3, 1-28. 8. THE INFLUENCE OF TEMPERATURE AND AVAILABILITY OF OXYGEN ON THE CARBOHYDRATES OF STORED BAKER'S YEAST K. Edelmann > , P. Stelvagen* and E. Oura** *Rajamaki Factories of the Finnish State Alcohol Monopoly (Alko), SF-05200 Rajamäki, Finland **Research Laboratories of the Finnish State Alcohol Monopoly (Alko), Box 350, SF-00101 Helsinki, Finland ABSTRACT Compressed baker's yeast stored either in 50 g pieces or in 1 kg blocks at temperatures of k, 10, 20, and 30 C was studied in respect to the consumption of reserve carbohydrates and the fermentative activity.

With the rapidly rising recirculation rate/costs rise equally rapidly, be it in terms of sedimentation volume or centrifuge or pumping costs. e. production rate divided by fermentation plus sedimentation volume shows a maximum at a particular hydraulic load. This maximum representing the most favourable ratio between productivity and total operating volume of the system will come close also to the economic optimum if additional cost factors such as pumping, piping and civil engineering are taken into account.

3: Computerized optimization of important v a r i a b l e s in the r e c i r c u l a t i o n system 44_ 2, 60 40' J» 2, 40 f 36 2,20 2, 00 > D M 32H OJ o —! -«. 0,8 0,6 r e c i r c u l a t i o n r a t e (h —ir~ 1,0 ~~1 1,2 ) F i g . , Meyrath, J . , Januany, 16-20. Meyrath, J . (1975). Stuparek, W. and Zerlauth, G. VKOCZA* KiockzmiA&iy, Apnll, (1979). V/LOCQÂA BiochoMUt/iy, 20-22. ABBREVIATIONS AND SYMBOLS a year BOD biological oxygen demand COD chemical oxygen demand d day DM dry matter h hour fermenter hydraulic load due to recycle =R H s fermenter hydraulic load due to substrate H total fermenter hydraulic load tot total sedimenter hydraulic load "'tot 1 litre μ specific growth rate P fermenter productivity F P FS t fsed V F sed V tot *F h overall productivity metric ton sedimentation characteristic (time to reach a given value X^) net fermenter volume sedimenter volume total volume of the system yeast dry matter concentration in fermenter yeast dry matter in the recycle X yeast dry matter due to substrate yield of biomass YDM yeast dry matter S y yield of biomass 5.

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