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Water 2018, 10(2), 138; https://doi.org/10.3390/w10020138

Empirical Characterization of Particle Size Distribution Spatial Dynamics for Helminth Eggs Detection in Waste Stabilization Ponds (WSP)

1
College of Engineering and Technology, Department of Water Resources Engineering, University of Dar es Salaam, Dar es Salaam P.O. Box 35131, Tanzania
2
School of Engineering, Institute for Infrastructure and Environment, The University of Edinburgh, Edinburgh EH8 9YL, UK
This paper is an extended version of our paper published in 2nd International Electronic Conference on Water Sciences (ECWS-2), 16–30 November 2017.
*
Author to whom correspondence should be addressed.
Received: 13 December 2017 / Revised: 12 January 2018 / Accepted: 24 January 2018 / Published: 1 February 2018
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Abstract

This study assesses seasonal particle size distribution (PSD) dynamics inside a waste stabilization ponds (WSP) (Buguruni, Tanzania) to understand settling dynamics of wastewater particles with an interest in helminth eggs. Results indicate that particles coming into the pond are mainly supracolloidal and settleables with 52.9% and 45.6%, respectively, in dry season and 48.9% and 49.9%, respectively, in wet season. Inflow PSD is a unimodal distribution that splits into settling and suspended PSDs, with an indication of particle breakage, as shown by the increased volume of smaller particles and hence the appearance of a bimodal distribution for the suspended particles. Up to 61.5% and 45.2% of particles that fall within the size range of helminths eggs are suspended during dry and wet seasons, respectively, with the potential to be carried in the effluent and to cause contamination. View Full-Text
Keywords: waste stabilization ponds; WSP; particle size distribution; helminths waste stabilization ponds; WSP; particle size distribution; helminths
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Izdori, F.; Semiao, A.J.C.; Perona, P. Empirical Characterization of Particle Size Distribution Spatial Dynamics for Helminth Eggs Detection in Waste Stabilization Ponds (WSP). Water 2018, 10, 138.

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