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Waste Management & Research, Vol. 16, No. 1, 23-31 (1998)
DOI: 10.1177/0734242X9801600104

Solid waste management in Onitsha, Nigeria

J.C. Agunwamba

Department of Civil Engineering, University of Nigeria, Nsukka, Nigeria

O.K. Ukpai

Department of Civil Engineering, University of Nigeria, Nsukka, Nigeria

I.C. Onyebuenyi

Department of Civil Engineering, University of Nigeria, Nsukka, Nigeria

Waste management in the municipality of Onitsha is handled by division of the municipality into six sanitation zones. Refuse is discharged into 1.5 m3 containers in the residential areas while 1.6 m3 containers and built-up dumps are used in the commercial, industrial and some residential areas. Vehi cles for waste collection include open tippers, side loaders, liftable container trucks and rear-loading compactors. A san itary landfill is the main method used for waste disposal; in addition, open dumps, a controlled landfill, and animal feed ing are employed. In order to help in future waste manage ment analysis and strategies in the Onitsha municipality, two- thirds of a 5 m3 truck loads of solid wastes were separated into components and their percentages by weight obtained. Refuse analysis indicated a high percentage of vegeta ble/putrescible and paper/wood products while the generation rate is 0.53 kg per capita per day. It was found that a great part of the budget (77%) was spent on collection and haulage leaving a minor amount (23%) for waste disposal. The adop tion of modem waste management practices should be emphasised in order to achieve greater efficiency.

Key Words: Component analysis • generation rate • collection cost • disposal cost • Nigeria


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