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contributor authorAbdur Rahman Quaff
contributor authorSaumyen Guha
date accessioned2017-05-08T21:41:49Z
date available2017-05-08T21:41:49Z
date copyrightMay 2011
date issued2011
identifier other%28asce%29ee%2E1943-7870%2E0000341.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/59751
description abstractThe effects of varying hydraulic retention time (HRT) and associated upflow velocity on mixing and reactor performance were evaluated in five lab-scale upflow anaerobic sludge blanket (UASB) reactors treating real domestic wastewater. The mixing and transport studies were carried out with the help of tracer experiments at various HRTs using a pulse tracer input. A number of existing models were assessed for the analysis of the time series of observed tracer concentrations. The plug-flow reactor (PFR) model with two-zone dispersion better simulated the time series of tracer concentrations at all HRTs than other models, such as single compartment dispersion, completely mixed flow reactors (CMFRs) in series, and a combination of CMFR and PFR. The dispersion coefficients obtained from the two-zone dispersion model correlated well with the dispersion analysis expression for flow in a circular cylinder, and the correlation can be used for the prediction of dispersion in a UASB reactor. The analysis of reactor performance data indicated that reduction of dispersion owing to decrease in the upflow velocity resulted in increased sulfidogenic activity in the reactor. This was attributed to the inability of the sulfate reducers to colonize in the reactor at high upflow velocity and mixing condition.
publisherAmerican Society of Civil Engineers
titleEvaluation of Mixing and Performance of Lab-Scale Upflow Anaerobic Sludge Blanket Reactors Treating Domestic Wastewater
typeJournal Paper
journal volume137
journal issue5
journal titleJournal of Environmental Engineering
identifier doi10.1061/(ASCE)EE.1943-7870.0000333
treeJournal of Environmental Engineering:;2011:;Volume ( 137 ):;issue: 005
contenttypeFulltext


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