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Non-isothermal drying kinetics of human feces
T Somorin1, B Fidalgo2, S Hassan2
1Department of Chemical & Process Engineering, University of Strathclyde, Glasgow, UK.
Drying Technology
|March 26, 2021
Summary
Drying human feces (HF) with woody biomass improves its characteristics. Higher heating rates are needed at low moisture levels to shorten drying times for better sanitation systems.
Area of Science:
- Environmental Engineering
- Thermal Engineering
- Waste Management
Background:
- Human feces (HF) present disposal challenges in non-sewered sanitation.
- Thermal treatment offers a potential solution for HF management.
Purpose of the Study:
- Investigate the non-isothermal drying behavior and kinetics of human feces.
- Provide data for designing efficient drying operations for HF.
Main Methods:
- Thermogravimetric analysis (TGA) was employed to study HF drying.
- The effects of heating rate and blending with woody biomass were evaluated.
Main Results:
- Effective moisture transport was observed at low heating rates (1 K/min).
- Higher heating rates are required for rapid drying at low moisture content.
- Blending HF with woody biomass enhanced its drying characteristics.
Conclusions:
- The study provides crucial data for designing drying units for HF.
- Findings support the development of non-sewered sanitary systems incorporating in-situ thermal treatment.
