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The volume of wastes generated was
computed using waste density of loose uncompacted
waste of 400 kilograms per cubic meter.
This density was also used by the GSO of
Tuguegarao City and some literature for Asian
countries. Volume of waste generated in m3/wk
is equal to the population per barangay multiplied
by the per capita rate of waste generation
(kg/cap/day) divided by the waste density (kg/
m3) multiplied by seven days.
Composition of Solid Waste
Composition of solid waste generated
by households was determined by getting the
percentage by weight of identifiable items such
as food waste, yard waste, glass, papers, plastics,
metals/cans, inert and other organics from
the samples previously described.
Composition of waste generated by
commercial establishments, institutions and
the market were done using quartering and
coning method. Waste collected from each of
the different sources were mixed, quartered
and coned until 25 kilogram weight of waste
from each source was obtained. Waste were
then identified from the 25 kilogram weight as
to food waste, yard waste, glass, papers, plastics,
metals/cans, inert and other organics.
Solid Waste Flow Modeling
The Stella software was used to model
the behavior of solid waste flow in Tuguegarao
city. The developed model is the decision support
system that serves as a tool in making
solid waste management decisions. The model
was based on the observed waste flow as
shown in Figure 4. The generated wastes were
temporarily stored on-site for collection. Bulk of
the collected waste was disposed off directly to
dumpsite. Small portion of which was brought
to processing and recovery facilities or transferred
to designated collection sites for transport
to dumpsite. A portion of the generated
waste most from the households was burned
and still others if not collected were littered on
vacant lots.
Figure 4. Waste flow in Tuguegarao City.
J.B. Guzman
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