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Experimental measurements were conducted of the minimum fluidization velocities and the entrainment (terminal) velocities for beds of dry, digested wastewater sludge particles. With the use of air, experiments were performed in an 80 mm i.d. glass column with carefully sieved, very narrow fractions of particles in a wide range of 0.65–5.3 mm. Physical examinations of the dried sludge particles revealed...
Results of extensive experiments with a laboratory slide feeder are presented. Different particulate materials such as sand, γ-alumina, ceramsite, dried sewage sludge, and shredded wood have been employed in testing the equipment for reproducibility of single doses and general reliability. Aside from physical characteristics of the respective particulate materials, the ratio of pocket diameter to...
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