ORIGINAL RESEARCH
The Biodegradation of Brewery Wastes
in a Two-Stage Immobilized System
1. I. Wojnowska-Baryła, 1. M. Zielińska, 2. A. Babuchowski, 3. A. Debourg
1. Faculty of Environmental Sciences and Fisheries, University of Warmia and Mazury in Olsztyn
ul. Prawocheńskiego 1, 10-957 Olsztyn, Poland
2. Institute of Food Biotechnology; University of Warmia and Mazury in Olsztyn, Poland
3. Institut Meurice-CERIA, Department of Brewing Sciences and Fermentation Technology, Brussels, Belgium
ul. Prawocheńskiego 1, 10-957 Olsztyn, Poland
2. Institute of Food Biotechnology; University of Warmia and Mazury in Olsztyn, Poland
3. Institut Meurice-CERIA, Department of Brewing Sciences and Fermentation Technology, Brussels, Belgium
Pol. J. Environ. Stud. 2002;11(5):571–575
KEYWORDS
ABSTRACT
The investigations were made in a loop bioreactor, where biomass was immobilized in the ceramic
carrier. The influence of the internal circulation rate on the biodegradation efficiency of brewery wastes by
immobilized biomass and on production of surplus sludge was examined. The rates of the internal circulation
were 12, 38, 50 dm3·h-1. The experiments were performed at constant loading rate of the carrier of 17.9
g·dm-3·d-1 and hydraulic retention time of 3 h. Increasing in the internal circulation rate from 12 to 50 dm3·h-1
caused enhancement of the removal rate from 0.40 to 0.48 gCOD·dm-3·h-1 and limitation of surplus sludge
productivity from 0.67 to 0.27 g·g-1 COD removed.
The biodegradation rate of brewery wastes in a two-stage immobilized system was determined. The
hydraulic retention time in this two-stage immobilized system was 6 h, which was enough to get a COD
below 150 mg·dm-3 in the effluent.
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