Faeces - urine separation via settling and displacement: prototype tests for a novel non-sewered sanitation system

Jan Hennigs, Kristin T. Ravndal, Alison Parker, Matt Collins, Ying Jiang, Athanasios J. Kolios, Ewan McAdam, Leon Williams, Sean Tyrrel

Research output: Contribution to journalArticle

Abstract

The development of novel, non-sewered sanitation systems like the Nano Membrane Toilet requires thorough investigation of processes that may seem well-understood. For example, unlike the settling of primary sludge, the separation of solids from liquids in a small-volume container at the scale of a household toilet has not been studied before. In two sets of experiments, the settling of real faeces and toilet paper in settling columns and the settling of synthetic faeces in a conical tank are investigated to understand the factors affecting the liquid quality for downstream treatment processes. Toilet paper is found to be a major inhibitor to settling of solids. While a lower overflow point results in better phase separation through displacement of liquid, a higher overflow point and frequent removal of solids may be more advantageous for the liquid quality.

Original languageEnglish
Article number141881
JournalScience of the Total Environment
Volume753
Early online date23 Aug 2020
DOIs
Publication statusE-pub ahead of print - 23 Aug 2020

Keywords

  • design of experiment
  • prototyping
  • testing
  • chemical oxygen demand
  • volatile solids

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