On the compressional rheology of fresh faeces: Evidence for improving community scale sanitation through localised dewatering
Edwina Mercer, Shane P Usher, Ewan J McAdam, Brian Stoner, Yadira Bajon-Fernandez
WATER RESEARCH | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2021
Non-sewered sanitation is currently dependant upon pit latrine emptying, the safety of which is compromised by the high costs of faecal sludge transport to centralised treatment facilities. Transport in turn is hindered by the complex rheology of pit latrine sludge. This study therefore characterised the compressional rheology of fresh faeces and modelled the implications for passive (gravity) or mechanical (forced) solid/liquid separation. This informs on the viability of decentralising dewatering for more efficient volume reduction and improving the economics of transportation. The gel point (ϕg) is the solids concentration where the material has a networked structure and signifies the poi..View full abstract
Awarded by Bill & Melinda Gates Foundation
This publication is based on research funded by the Bill & Melinda Gates Foundation (grant number OPP1173370) . The findings and con-clusions contained within are those of the authors and do not necessarily reflect positions or policies of the funders.