Highly viscous substances, such as feces, produce significant heat when layer deformation occurs. We describe the use of viscous heating sufficient to destroy disease-causing microorganisms and whipworms in feces. Computational fluid dynamics (CFD) was used to evaluate preliminary design and provide initial geometric specifications for a laboratory-scale unit. The laboratory device has a rotating core separated from a fixed shell wall by a defined space. Data were obtained over a range of operating conditions with simulant materials. The CFD model was validated with the experimental results. The temperature observed with the smallest spacing was 190 °C. Alternative geometries are considered for high-volume sludge processing. Potential design modifications include enhancing efficient water evaporation and recovery.
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Research Article|
October 21 2013
Viscous heating analysis of simulant feces by computational fluid dynamics and experimentation
Jagdeep T. Podichetty;
Jagdeep T. Podichetty
1423 Engineering North, School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
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Md. Waliul Islam;
Md. Waliul Islam
1423 Engineering North, School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
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David Van;
David Van
1423 Engineering North, School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
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Gary L. Foutch;
1423 Engineering North, School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
E-mail: [email protected]
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A. H. Johannes
A. H. Johannes
1423 Engineering North, School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
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Journal of Water, Sanitation and Hygiene for Development (2014) 4 (1): 62–71.
Article history
Received:
May 06 2013
Accepted:
September 05 2013
Citation
Jagdeep T. Podichetty, Md. Waliul Islam, David Van, Gary L. Foutch, A. H. Johannes; Viscous heating analysis of simulant feces by computational fluid dynamics and experimentation. Journal of Water, Sanitation and Hygiene for Development 1 March 2014; 4 (1): 62–71. doi: https://doi.org/10.2166/washdev.2013.070
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