The Integrated Waste Management and Sustainable Landfilling
Waste management, being one of the most important aspects of urban development, is gaining importance among developing nations. Landfills, which were initiated for hazardous waste management and subsequently transformed into sanitary landfills, have been the most widely adapted practice for municipal solid waste management worldwide. The research were conducted over a 9 months period in 3 years on the operational strategy of the larger of the only two sanitary landfills and leachate treatment ponds in NIGERIA and sub-Sahara Africa. The purpose was to examine and evaluate the sanitary landfill and leachate stabilisation ponds against the backdrop of technically sound and sustainable management options. However, the conventional design of landfills not only fails to fulfil the needs of waste management but also fails to target optimal resource recovery and energy generation. In the present study, modified design was proposed for partially engineered landfill system based on theoretical considerations based on integrated and sustainable principles that can deliver environmental, social and economic stability in the nation. Furthermore, it was found that the system with modified design could yield 2.157 million tons of landfill gas (2.145 million tons of coal equivalents) out of one year of solid waste. Further, this could recover resource valued at US$16.49 million per year.
Keywords - Sanitary Landfills, Sustainable, Integrated Solid Waste Management, Leachate Stabilization Ponds, Lagos, Nigeria, Sub-Saharan Africa, Developing Economies