

@article {14264,
	title = {Modelling of coliform removal in 186 facultative and maturation ponds around the world.},
	journal = {Water research},
	volume = {39},
	number = {20},
	year = {2005},
	month = {dec},
	pages = {5261{\textendash}73},
	abstract = {The paper presents a very extensive evaluation of the coliform decay in facultative and maturation ponds, based on data from 186 different ponds in the world. The ponds encompass a very wide diversity in terms of physical and operating conditions, covering most situations encountered in practice. The median values for the coliform removal efficiencies were 1.8 log units (98\% removal) for primary facultative ponds, 1.0 log units for secondary facultative ponds (90\% removal) and 1.2 log units (94\% removal) for each maturation pond in the series. Two equations to be used for design purposes were derived for estimating the die-off coefficient K(b) (dispersed flow, 20 degrees C) in facultative and maturation ponds. The first equation led to a slightly better fitting with the observed logarithm of the effluent coliform concentrations (R2 = 0.874), and related K(b) with the pond detention time t and depth H (K(b) = 0.682 H(-1.286) t(-0.103)). The other equation also led to a satisfactory fitting (R2 = 0.845), but was slightly simpler, depending only on the pond depth (K(b) = 0.549 H(-1.456)).},
	keywords = {Enterobacteriaceae, Enterobacteriaceae: isolation \& purification, Fluid, Fluid: methods, Models, Theoretical, Waste Disposal, Water Pollutants},
	issn = {0043-1354},
	doi = {10.1016/j.watres.2005.10.016},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/16310239},
	author = {Von Sperling, Marcos}
}
