Sharif Digital Repository

Leachate migration from solid waste landfills into the subsurface environment is one of the significant problems of landfills. This can cause lots of problems for local soil and water to sources according to the contaminants appear in the leachate. Usually, landfill sites include at least one compact clay liner to prevent contamination of groundwater by produced leachate. Over the last decades investigators have been attracted to the structure and removal capacity of this liner. In this study, the effect of the addition of Zeolite to Kaolinite soil for the removal of heavy metal (manganese and zinc) from landfill leachate and the effect of decreasing the thickness of the soil layer has been... 

Garbage leachate which contains suspended and soluble pollutants is produced due to the decomposition of organic substances by microbial activities. Moreover, other sources of water such as surface runoff, rainfall, and groundwater – which in many cases may percolate through the garbage-, can intensify leachate production which in turn imposes considerable impacts on the main elements of the environment, such as water, soil, and air, and has health effects on human beings. Therefore, minimization of leachate production is an important issue in the solid waste management considering economic, social, cultural, and many other aspects. On Kish Island, despite the favorable climatological... 

Microbial Electrolysis is a new method for producing Biohydrogen from oxidation of organic materials by microorganisms. Generally, this process is depended on two different kinds of energy source containing Organic Material Oxidation by bacteria and Electricity. In this specific study, landfill leachate, extracted from ARADKOOH Tehran Iran was used as a carbon source and effective parameters in Microbial Electrolysis Cell were scrutinized for increasing the hydrogen production and efficiency of COD removal in wastewater. Two H-type rectors with 300 ml of volume in each side were used during the experiments. Various amount of voltages started with 0.4 (V), were tested in the system and it was... 

Designing a system based on 2 to 5 MeV electron accelerators for X radiation of urban waste.Nowadays , the use of ionizing radiation in two cases of treatment and removal of contaminants in the waste including; 1) Pathological hospital waste 2) leachate from buried urban waste, which is studied and examined in this project. Buried urban wastes begin to break down under aerobic and anaerobic processes, and as long as the materials are not changed into sustainable materials, these processes will continue and results in landfill gas and leachate. Gas is produce due to anaerobic processes and leachate which is produced through water infiltration (atmospheric precipitation) in the landfill or... 

Treatment of landfill leachate with membrane bioreactor (MBR) in lab and pilot scale have been studied in this research. MBR biological adaptation procedure at start of biological treatment, choose of membrane materials, membrane production with highest treatment performance and lowest membrane foaling have been studied. Mixed liquor suspended solid of MBR at the start of adaptation period was 3000 ppm and at the end of this period became 7000 ppm, microbial community has been changed in this period. Number of microbial species were reduced and number of these adapted species were increased. Five membranes were prepared with different concentration of PVDF polymer, solvent and non-solvent to...