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Urban waste management and the environmental impact of organic waste treatment systems in Kampala, Uganda

Komakech, Allan John (2014). Urban waste management and the environmental impact of organic waste treatment systems in Kampala, Uganda. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2014:77
ISBN 978-91-576-8102-7
eISBN 978-91-576-8103-4
[Doctoral thesis]

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Abstract

In Kampala, Uganda, about 28,000 tonnes of waste are collected and delivered to landfill every month. Kampala Capital City Authority records show that this represents
approximately 40 % of the waste generated in the city. The remaining uncollected waste is normally burnt and/or dumped in unauthorised sites, causing health and
environmental problems. However, the organic fraction of domestic waste can provide an opportunity to improve livelihoods and incomes through fertiliser and energy
production. This study employed environmental systems analysis to identify the most environmentally efficient technologies for treating the organic waste generated. The work was undertaken through interrelated studies. These were a literature review of waste hierarchy practices suitable to the development of a sub-Saharan African city using Kampala as a case study; a physical and chemical characterisation of municipal waste collected and delivered to Kampala’s landfill over the span of a year to cover both dry and wet seasons; a mapping of the location of animal farms and the
establishment of animal feeding and waste management practices on animal farms in Kampala; treatment of Kampala's organic waste by means of the vermicompost method and finally using life cycle analysis to identify the best waste treatment method for organic waste generated out of anaerobic digestion, compost, vermicompost and fly larvae waste treatment technologies. The impact categories assessed were energy use,
global warming and eutrophication potentials. Generally, the results showed that re-use and waste prevention waste hierarchy methods are the most feasible for the
development of waste management in Kampala: over 92 % of the waste generated is organic in nature, containing on average a moisture content of 71.1 %, 1.65 % nitrogen,
0.28 % phosphorus, 2.38 % potassium and a gross energy content of 17 MJ/kg; most animal farms are located on the periphery of the city, and the most popular animal feeds
are peelings and pasture; 60 % of the animal manure generated is discarded and 32 % used as fertiliser; a 60.3% material degradation was achieved in the vermicompost process while the feed-to-biomass conversion rate was 3.6 % on a dry matter basis; and finally anaerobic digestion performs best in terms of energy use, global warming potential and eutrophication potential. However the study concluded that poorly managed anaerobic digestion technology with extensive methane leakages will make a considerable contribution to global warming. Further research is needed to establish the viability of fly larvae waste composting in sub-Saharan Africa and to measure direct emissions from the different organic waste treatment technologies in a sub-Sahara African city setting.

Authors/Creators:Komakech, Allan John
Title:Urban waste management and the environmental impact of organic waste treatment systems in Kampala, Uganda
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2014
Volume:2014:77
Number of Pages:94
Papers/manuscripts:
NumberReferences
I.Komakech A.J., Banadda N.E., Kinobe J.R., Kasisira L., Sundberg C., Gebresenbet G. and Vinnerås B. (2014). Characterisation of municipal waste in Kampala, Uganda. Journal of the Air & Waste Management Association 64(3), 1-9. DOI: 10.1080/10962247.2013.861373.
II.Komakech A.J., Banadda N.E., Gebresenbet G. and Vinnerås B. (2014). Maps of animal urban agriculture in Kampala City. Agronomy for Sustainable Development 34(2), 493-500. DOI 10.1007/s13593-013-0164- 7
III.Lalander C.H., Komakech A.J., and Vinnerås B. Production of vermicompost and protein from manure and food waste – A case study from Kampala (manuscript).
IV.Komakech A.J., Vinnerås B., Jönsson H. and Sundberg C. Comparison of different biodegradable waste treatment technologies in SSA cities using life cycle assessment – A case study of Kampala (manuscript).
Place of Publication:Uppsala
Publisher:Department of Energy and Technology, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:SLU - Agricultural Sciences for Global Development > Urban and peri-urban farming
ISBN for printed version:978-91-576-8102-7
ISBN for electronic version:978-91-576-8103-4
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F04 Fertilizing
Q Food science > Q70 Processing of agricultural wastes
T Pollution > T01 Pollution
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 207 Environmental Engineering > Environmental Management
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Environmental Sciences related to Agriculture and Land-use
Agrovoc terms:urban wastes, organic wastes, waste treatment, waste utilization, vermicomposting, farmyard manure, environmental impact, energy consumption, global warming, eutrophication, africa south of sahara, uganda, developing countries
Keywords:Kampala, Life cycle assessment, Organic waste, sub-Saharan Africa, waste characterisation, waste treatment
URN:NBN:urn:nbn:se:slu:epsilon-e-2150
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2150
ID Code:11558
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
External funders:Regional jordbruksforskning för norra Sverige and Utrikesdepartementet
Deposited By: Mr. Allan John Komakech
Deposited On:02 Oct 2014 13:03
Metadata Last Modified:14 Dec 2014 15:09

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