Publisher's Synopsis
Solid Waste Management (SWM) is becoming serious problem in developing countries like India. It's not working accurately in India. There are several techniques that are used for solid waste treatment such as biological treatment, composting and recycling etc. But the landfill is considered to be the cheapest method of solid waste disposal. This work describes the use of Multi Criteria Decision Making (MCDM) tools for the selection of suitable site for the disposal of solid waste in Najaf governorate. Several criteria have been considered in each of these location (eg: legal impact, economic, environmental, social, monitoring quality) to select to select the best site. Different MCDM methods used in this work are Analytical Hierarchy Process (AHP), Technique Of Order Preference by Similarity to Ideal Solutions(TOPSIS) andPreference Ranking Organization Method for Enrichment Evaluation(PROMETHEE II). With the help of the proposed decision making frame work, the high and low suitable areas were determined.The basic concept of TOPSIS is to selects the alternative that is the closest to the ideal solution and farthest from negative ideal alternative.TOPSIS assumes that we have m alternatives (options) and n criteria. Therefore, it is easy to define the ideal and negative-ideal solutions. The Euclidean distance approach is used to evaluate the relative closeness of the alternatives to the ideal solution. Thus, the preference order of the alternatives can be built by a series of comparison of these relative distances. Generally the decision maker wants to have a maximum value among the alternatives. In case of cost criteria, the decisionTo make the result more precise, another widely used MCDM tool is PROMETHEE II. It refers to Preference Ranking Organisation Method for Enrichment Evaluation. PROMETHEE II is not only used for picking the right alternative, rather helps decision makers find the alternative that best suits their goal. This makes use of point fuzzy scale to build the decision matrix. The PROMETHEE II methodology promotes and prioritizes alternatives based on pair wise comparisons. Then the preference function for each of the pairs is calculated and the deviation should be between the number 0 and 1. Then the positive and negative flow at each criteria has to be calculated which determines the net flow of the alternatives or criteria. The higher the value, the higher the preference and ranked accordingly, Based on that ranking for 5 different locations in Najaf governorate is carried out using combined AHP-PROMETHEE II method is briefly carried out.Similarly in order to rank the 4 different sites and to give the priority among these sites based on the constraint 'distance To wetland' criteria was carried out using fuzzy-AHP method. Here the pairwise comparison for one sit over other is calculated using triangular fuzzy scale comparison and the priority among these 4 sites is carried out in this work. Hence in this work the need of MCDM tools or the methods in addressing the issues of landfill site ranking is carried out briefly in this work.
