A large amount of Municipal Solid Waste (MSW) in Africa still piles up
on the spot, in trenches, ditches, riverbanks and roadsides, the waste burns in
open air or drift by the river flow or the heavy rains. The consequences are
air pollution, contamination of soil, groundwater, and rivers. Matadi is the capital of the province
Congo Central situated in the bank of the Congo River, where there is also a
large amount of MSW. In this article, the authors aimed to present the key elements for the best performance and profitability of
Municipal
Solid Waste (MSW) management in low-income cities and presented a case study of Matadi.
The research provided an overview of methods and models for integrated
planning of a two-phase program: MSW collection and transportation, and MSW
treatment. The authors presented the case study of Matadi (the Democratic
Republic of Congo) that had a low level of the MSW management compared to other
African cities. And they developed a spreadsheet model for collection and
transportation of MSW which was relevant for low-income cities and enabled
determining the waste collection fee. A CDM decay model was used to predict the
GHG emissions in disposal site. The MSW treatment plant in case of Matadi was
evaluated. For the anaerobic digestion technology selected as appropriate for
this plant, the key factors that ensured profitability of the plant were as
follows: tipping fee from the municipality (19% of total revenue), amount of
carbon credits which can sum up to 16% of the total revenue, expansion of waste
collection range from 25 to 50 km.
In conclusion, the methods of this study can be used for solving waste
problem in other low-income cities where the budget for municipal services is
scanty, particularly when starting from a very low or even zero level of MSW management.
Full
access: http://mrw.so/4l07ou
Image
by USEPA Environmental-Protection-Agency, from Flickr-cc.
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