Influence of Temperature on the Spatial Distribution of Macro-Organisms in the GSAP† Microflush Toilet Digester and On Extended Applications of the Technology
Stephen Mecca, Cayla Stifler and Catherine Beley
Review I Published January,2017
Journal of Physical Science and Environmental Studies Vol. 3 (1), pp. 1-7
ABSTRACT
Composting macro-organisms such as those found in the GSAP
(Global Sustainable Aid Project) Microflush toilet prefer
habitats based on a number of factors including temperature,
pH, soil moisture, oxygen, C/N ratio in the waste, light
intensity, propagule pressure and competition from other
detritus feeders. One such organism, e-fetida (Eisenia-fetida),
is especially important in composting human feces in the
filter-digester. Casual observations of several installed
systems find a high density of this macro-organism in the
perimeter area of the bed. Even though the measured
temperatures across the bed are rather constant and within
the range of acceptable habitats for this composting worm,
among the possible factors, temperature was thought to be
the likely cause. The heat conduction (Poisson) equation in
3-dimensions was solved for the geometry, structural
elements and installed depth of the digester with boundary
conditions typical of the tropical regions where the toilet
is used. Results show temperature gradients in the narrow
region near the perimeter of the bed supporting the
hypothesis. The role of digester construction material in
impacting transient temperatures, temperature gradients and
hence performance of the system has also been explored and
the potential for application of the technology in colder
climates has been studied.
Key words: E-fetida habitat, Temperature gradients,
GSAP-Microflush, Sustainable sanitation.
- Journal of Agricultural Science and Food Technology (JASFT)
- Journal of Medical and Biological Science Research (JMBSR)
- Journal of Scientific Research and Essays (JSRE)
- Research Journal of Educational Studies and Review (RJESR)
- Journal of Physical Science and Environmental Studies (JPSES)
- Research Journal of Engineering and Technology (RJET)
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Pearl Journal of Management, Social Science and Humanities (PJMSSH)