In this study the concept of biofilm accumulation in the sand column was promoted to assess the changes in hydraulic conductivity and concentration of organic contaminants of the synthetic leachate. Four different combinations of column study were carried out using synthetic leachate as a substrate solution. Mixed and stratified mode of experiments with two different sizes (0.3 mm and 0.6 mm) o...

background: the municipal solid wastes (msws) are disposed in open dumps, which have no leachate collection and removal system, in the caspian region of iran. leachate readily reaches the nearby water resources such as streams, rivers, lakes, and sea. therefore, understanding the quality and quantity of open dump leachate is vital to the proper treatment of leachate. methods: the leachate sampl...

Landfill leachate is highly loaded, toxic and is bad for the sanitation of wastewater. In this paper, the treatment of the municipal landfill leachate from Shaoxing landfill was evaluated by using gas-liquid fluidized bed with Fenton reagent. The effects of various operating conditions such as treatment time, initial pH value, initial [H2O2], initial [Fe], and ventilation volume were examined. ...

Two batch experiments were conducted during the months of June-July (summer) and September-October (fall) to determine the effect of Electrical Conductivity (EC) on nutrient and COD removal & uptake efficiency and growth of duckweed (Lemna minor) at leachate with various EC levels (500-3,000 μS cm -1 ) under the natural climatic conditions of Islamabad, Pakistan. Maximum removal rates (mg m -2 ...

tehran has a population of over 12 million and produces more than 7500 tons of waste every day. tehran’s municipal solid waste is processed and landfilled at kahrizak disposal center. due to inappropriate waste management, a lake with a leachate volume of 180,000m3 has been formed. to solve this problem a leachate treatment plant is currently under construction. a byproduct of leachate treatmen...

Landfilling is one of the most widely used techniques, despite its numerous environmental problems, for the treatment and disposal of solid wastes. Significant effort has been directed toward the development of improved landfill designs to reduce the negative environmental impacts. Still, at present, about three quarters of the countries and territories around the world use 'open dumping' metho...

Background Leachate is one of the most problems present in landfills, mainly due to large production and the ability to cause serious environmental damages next to these areas. An activated sludge process is commonly used for biodegrading organic contaminants in wastewater using a mixed population of microorganisms. This technology is consolidated for wastewater treatment, and recently has been...

This paper examines the efficiency of electro-oxidation used as the single pretreatment of landfill leachate. The experiments were performed on three different types of leachate. The results obtained using this electrochemical method results were analyzed after seven days of treatment. The main characteristics of leachate and a diagram of the experimental apparatus are presented. The overall ob...