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Fluidised bed dryers

The fluidised-bed dryer employs a fixed vertical vessel with a perforated base through which hot gases (air or steam) pass. Sludge particles entering the vessel are gently agitated in a stream of pre-heated gas, so that the gas stream is used for both heating and mixing. Fluidised bed dryers require operation with backmixing of part of the dried sludge product stream with the feed to prevent the sludge going through the sticky phase.

Fluidised bed dryers related videos

Fluidised bed dryer, Andritz Source: ANDRITZ GROUP / YouTube

Fluidised bed dryer, Andritz

Video to demonstrate sludge drying in a fluidized bed dryer.

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Fluidised bed dryers features and blogs

Schematic of intensification of AD by thermal hydrolysis, showing thickening, TH, AD and post-AD DW. Coversion of biogas be CHP engine included.
Blog

Pretty intense: the intensification of sewage sludge processes

Sludge intensification processes increase the sewage sludge solids concentration through thickening/dewatering or the biogas generation by digestion. But at what point do you stop extracting more water from the sludge or enhancing biogas production?

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