Development of techno-economic integrated models: LFSGR and aerobic composting for municipal waste management

Sudhakar Yedla

Environment and Development Economics, 2003, vol. 8, issue 04, pages 655-677

Abstract: In the present study, integrated models have been developed to find out the most appropriate cost of municipal solid waste (MSW) disposal using two potential and widely used methodologies, viz. landfill system with gas recovery (LFSGR) and aerobic composting (AC). Objective functions with important costs and benefits including externalities were developed to find out the net unit cost of disposal. Multivariate functional models have been developed for each activity of the objective functions. These integrated techno-economic models can be used not only to determine the most appropriate cost of waste disposal, but also to explain the interparametric linkages and even to compare the potentiality and suitability of a particular methodology for a set of conditions. This can give valuable information that can enhance environmental management leading to sustainable development.In the simulation studies carried out, LFSGR with its proven energy generating potential from MSW in the form of landfill gas, was found to perform better than aerobic composting (AC) for rates of waste generation greater than 1,000 2,000 t d (tons per day). LFSGR showed a better performance irrespective of the landfill collection system installation and operation costs. For both methodologies, unit cost of disposal was most sensitive to land rent followed by, in the case of LFSGR, the organic content.

Date: 2003

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