Abstract
Landfills within the City of Johannesburg (CoJ) are
running out of airspace. To slow down airspace consumption
rate, waste discharged at these landfills must be minimised,
and where possible recover useful resources. A multi-criteria
decision tool, the Analytical Hierarchy Process (AHP) was
employed to appropriate technologies for fruit and vegetables
waste discharge at Robinson Deep landfill. The goal of the
approach is environmental sustainability. Pairwise
comparison of four criteria and four technology alternatives
were investigated. Data used were retrieved from a research
group and consultations with waste to energy experts. Of the
four technology alternatives, anaerobic digestion (AD) is the
most preferred. Incineration technology has 49.42%
preference to AD because it is perceived to reduce the
bulkiness of waste discharged at the landfill. Composting has
25.24% preference to AD and it is believed to encourage home
management of waste. Consistency ratio for all pairwise
comparison was less than 0.1.