Modeling the kinetics of manure-borne fecal indicator removal in runoff

Journal of Environmental Quality
Matthew D StockerY A Pachepsky

Abstract

Several manure-borne microorganism removal models have been developed to provide accurate estimations of the number of microorganisms removed from manure or manured soils undergoing rainfall. It has been commonly assumed that these models perform equally well when used to simulate microbe removal in runoff from manures of different consistency and levels of weathering. The objectives of this work were (a) to observe kinetics of the removal of Escherichia coli and enterococci with runoff for two different manure consistencies and three manure weathering durations, and (b) to compare performance of the log-linear, Vadas-Kleinman-Sharpley, and Bradford-Shijven models in simulation of the observed kinetics. Liquid and solid dairy manure were applied to grassed soil boxes that received simulated rainfall immediately after application and subsequently at 1 and 2 wk. Runoff samples were collected for 1 h at increasing time intervals during each event. Only the effective rainfall depth at the start of runoff was significantly affected by manure consistency (p = .033), whereas other parameters were not (p > .05). Substantial differences in microorganism removal kinetics during the initial, 1-, and 2-wk rainfall events were manifested by...Continue Reading

References

Sep 25, 2002·Environmental Science & Technology·Scott A Bradford, Jack Schijven
Oct 10, 2006·Applied and Environmental Microbiology·A K GuberL J Sikora
Sep 19, 2008·Journal of Environmental Management·Yakov A PachepskyGregory W McCarty
Apr 20, 2010·Journal of Environmental Quality·Michelle L SoupirTheo Dillaha
Sep 20, 2015·The Science of the Total Environment·Ryan A BlausteinYakov A Pachepsky

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