Leachate Treatment by Reverse Osmosis Method- Regional Sanitary Landfill “Zeljkovac” Case Study

Abstract

The purpose of this paper is to elaborate a plan for the leachate treatment at the “Zeljkovac” sanitary landfill in Leskovac city. Different processes occur over time at the landfill. The processes of infiltration and transpiration occur continuously, distributing the humidity and affecting the water balance within the body of the landfill. The landfill body acts as a giant sponge, in which water moves, and from which water can be released - both into groundwater and into the atmosphere in the form of water vapour or as a filtrate at the bottom of the landfill. In this paper, particular attention is given to the kind of waterwhich is actually filtrate from a landfill, often called leachate. The efficiency of the most commonly used methods will be presented, depending on the most prevalent pollutants in leachate. As there are many methods for treating this kind of wastewater, the reverse osmosis method will be presented as one of the most widely used . The technological process of a reverse osmosis plant will be described, as well as the result that shows the output quality of the leachate after the treatment process. The major finding of this paper reflects a clear justification for using this method to achieve the desired efficiency of leachate treatment.

Landfill leachate migration modeling using the LandSim software. Case study of Gigoš Regional sanitary landfill

“…The quantity and quality of leachate depends on several influencing factors (climate, amount and composition of waste, hydro-geological characteristics of the landfill site, municipal waste disposal technique, as well as the age of the landfill) [5]. During the working life of the landfill, including operational phases and phases after closure, it is necessary to control landfill leachate as well as surface flows near the landfill to monitor the migration of leachate and its impact on the immediate environment [6].…”

“…Depending on the time of year or meteorological parameters in general, the amount of precipitation may differ and thus have a different effect on the amount of water that will be filtered over a specific period [6]. Furthermore, water migration through the waste depends on the porosity of the waste, its humidity, thickness, as well as changes in the chemical and morphological composition of the waste in the internal layers of the landfill, which are caused by landfill aging [5].…”