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Four methods commonly used in the literature for evaluating the hydraulics of Upflow Anaerobic Sludge Blanket (UASB) reactors were compared in a pilot-scale UASB reactor (518 L). The methods are based on the analysis of the tracer concentration curve in the collection points by using ionic lithium (Li+) as a tracer. The tracer was collected at two points: in the effluent and in the sludge blanket...
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