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Continuous primary fermentation of beer with yeast immobilized on spent grains ...

A one-stage continuous primary beer fermentation with immobilized brewing yeast was studied. The objective of the work was to optimize the operational conditions (aeration and temperature) in terms of volumetric productivity and organoleptic quality of green beer. The system consisted of an internal-loop airlift reactor and a carrier material prepared from spent grains (a brewing by-product). An industrial wort...

Continuous beer fermentation with yeast immobilized on spent grains : the effec...

Continuous primary beer fermentation with brewing yeast immobilized on spent gr...

This work demonstrated the technological feasibility of the three-phase airlift bioreactor (ALR) with brewing yeast immobilized on spent grains (a brewing by-product) for continuous beer production. The optimum fermentation performance of the one stage immobilized cell bioreactor was achieved at residence times between 18–25 h (dilution rate 0.04–0.055 hˉ¹) and was characterized by an apparent degree of attenua...

Continuous beer fermentation with brewing yeast immobilized on carrier made of ...

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Continuous primary beer fermentation with brewing yeast immobilized on spent gr...

Spent grains : a new support for brewing yeast immobilisation

A novel carrier obtained from spent grains, a brewing by-product, was used for brewing yeast immobilisation in a continuous bubble-column reactor. The multiple-layer cell adhesion to the carrier particles resulted in a maximum cell load of 430 mg dry cell gˉ¹ dry carrier (d.c.). After 120 h of reactor operation, the cell load of DEAEmodified carrier was below 40 mg dry cell gˉ¹ d.c. while the values for non-mod...

Aplicação de um sistema de análise de imagem à monitorização da fermentação