APPLICATION OF COST CRITERIA FOR SELECTION OF MUNICIPAL WASTEWATER TREATMENT SYSTEMS

摘要

Analysis of economic data pertinent to the existing municipal wastewater treatment plants (MWTP) in Greece is presented. This information is important when budgeting for future plants. The data include land usage and the costs for construction, operation and maintenance of the form y = ax~b, where a and b are calculated coefficients. Equations for cost and land use were produced for specific systems. Personnel and energy aspects are analysed as they are major contributors to operational cost. A life cycle analysis (LCA) of plants is undertaken. The results of such an analysis should suggest the most preferable technology under given circumstances. Thus, under high energy costs and low level of automation and operation, at low F/M ratios, conventional activated sludge systems are relatively not cost effective. In addition, for cost of land less than US$30 per m~2, waste stabilisation ponds are cost effective subjected to minor earthworks.