Journal
DRYING TECHNOLOGY
Volume 20, Issue 4-5, Pages 839-853Publisher
MARCEL DEKKER INC
DOI: 10.1081/DRT-120003766
Keywords
brewery wastes; evaporation rate; lactate wastes; particle size distribution; sorption isotherm
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Sludge wastes are a very attractive source of many valuable compounds such as nitrogen, phosphorus and organic matter. One of the interesting methods of sludge utilization is dewatering and drying. In this paper some problems of drying of two types of sludge wastes of different form and origin are presented. One of the sludges-a brewery by-product-contains spent grain suspension of brewer's yeast and diatomaceous earth. The second one is a by-product of a biotechnological process which contains mainly lime, protein, many microelements and some microorganisms. Moisture content of both sludges is about 65-70% w/w. The laboratory experiments of sludge drying in the fluidized bed dryer with a mixer, fluidized bed hydrodynamics, and the effects and advantages of sludge drying are shown.
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