Numerical Study Of County Solid Waste Management At The Dumpsite
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Date
2015Author
Kenanda, Akama
Sigey, Johana K
Okelo, Jeconia A
Okwoyo, James M
Giterere, Kang’ethe
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
This study presents the development of one
dimensional mathematical model capab
le of simulating
simultaneous processes of oxygen flow. It is based on some
assumptions like the dumpsite is assumed to behave as a
bioreactor in which gas phase generation is over i.e.
methanogenic is finished and the humic phase is started.
This mathemat
ical model actually describes the oxygen
concentration in the dumpsite. The resulting governing
equations in the form of partial differential equation (PDE)
have been solved by Finite difference method in which
Crank
-
Nicolson scheme is developed. The goal
is to study the
three transport parameters; effective diffusivity, decay
constant rate and porosity on the oxygen concentration
which results in degradation of refuse because after a long
term processes in the dumpsite. When all the remaining
substrate bec
omes more and more resistant to degradation,
microbial activity slows down and the humic phase is
reached. During the humic phase, the available degradable
organic material is either depleted or either the reactions are
too slow to consume oxygen entering
the dumpsite. The main
focus is to study the governing partial differential equations
having three transport parameters and their effect on oxygen
concentration with velocity of oxygen kept constant.
Solutions of the governing equation are obtained using
M
ATLAB software. The results of the project then are
presented in the form of tables and graphs. From the
simulated results it is found that for the particular time,
oxygen concentration decreases with increase in reaction
rate constant (
k
) with times and depths at the dumpsite.
Oxygen concentration at the dumpsite increases with
increase in porosity (
) at a particular time at all depths.
Oxygen concentration increases with increase in effective
diffusivity (
D
) time and depths.
Citation
International Journal of Scientific Research and Engineering Studies (IJSRES) Volume 2 Issue 10 , October 201 5Subject
Oxygen flowDumpsite
Partial differential Equation (PDE)
Crank - Nicolson Scheme (CNS)
Effective diffusivity (D)
Decay constant rate
Porosity
Rights
Attribution-NonCommercial-ShareAlike 3.0 United StatesUsage Rights
http://creativecommons.org/licenses/by-nc-sa/3.0/us/Collections
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