Next Article in Journal
Impact of Urban Growth and Changes in Land Use on River Flood Hazard in Villahermosa, Tabasco (Mexico)
Next Article in Special Issue
Legitimization of the Inclusion of Cultural Practices in the Planning of Water and Sanitation Services for Displaced Persons
Previous Article in Journal
Water Quality Changes during Riverbank Filtration in Budapest, Hungary
Previous Article in Special Issue
A Traditional Closed-Loop Sanitation System in a Chronic Emergency: A Qualitative Study from Afghanistan
Open AccessCommunication

Experimental Determination of Moisture Sorption Isotherm of Fecal Sludge

1
Département de Génie Civil et de Génie des Eaux, Université Laval, Québec, QC G1V 0A6, Canada
2
Department of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada
*
Author to whom correspondence should be addressed.
Water 2019, 11(2), 303; https://doi.org/10.3390/w11020303
Received: 4 December 2018 / Revised: 6 February 2019 / Accepted: 8 February 2019 / Published: 11 February 2019
(This article belongs to the Special Issue Water, Sanitation, and Hygiene in Humanitarian Contexts)
  |  
PDF [3350 KB, uploaded 17 February 2019]
  |  

Abstract

Dewatering and drying of fecal sludge (FS) is a key treatment objective in fecal sludge management as it reduces volume (thereby reducing emptying frequency and associated transportation costs), inactivates pathogens, and is beneficial and/or necessary to resource recovery activities such as composting and combustion as fuel. However, studies on dewatering performances of FS are limited. The physical water distribution of such matrices is not fully understood, limiting the progress in the development and optimization of FS dewatering technologies. The objective of this study is to present a gravimetric method intended to assess the dewatering characteristics and associated modelling of FS through moisture sorption isotherms. Samples were placed in airtight jars containing different saturated salt (NaOH, CaCl2, NaCl, KCl, K2SO4) solutions to reproduce a range of relative humidity values (6 to 97%). Results confirmed the achievement of characteristic sigma-shaped moisture sorption isotherms with increasing moisture adsorption at higher values of relative humidity. Furthermore, experimental data best fit the three-parameter Guggenheim–Anderson–de Boer (GAB) model. This method can be replicated to contribute critical data about the characterization of fecal sludge, a seriously under-researched matrix. View Full-Text
Keywords: desiccation; drying; fecal sludge management; moisture sorption isotherms; sanitation desiccation; drying; fecal sludge management; moisture sorption isotherms; sanitation
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Bourgault, C.; Lessard, P.; Remington, C.; Dorea, C.C. Experimental Determination of Moisture Sorption Isotherm of Fecal Sludge. Water 2019, 11, 303.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top