Volume No. 8 Issue No.: 2 Page No.: 365-370 Oct - Dec 2013

 

APPLICATIONS OF ADSORPTION PROCESS FOR TREATMENT OF LANDFILL LEACHATE

 

Motling Sanjay, Dutta Amit and Mukherjee S. N.*

Civil Engineering Department , Jadavpur University, Kolkata (INDIA)

 

Received on : August 10, 2013

 

ABSTRACT

 

In the advent of increasing stress on growth of population in urban and peri-urban centres of major Indian cities, solid waste production rate is also elevated rapidly in varying proportion from 3-7% per year. In some metropolitan cities, per capita waste production rate even exceeds 1.0 kg/day. All the municipal authorities are facing an uphill task for scientific disposal of solid waste. Amongst various kinds of disposal methods, landfill is the most common and widely used practice. However, one of the major concerns of landfill site is leachate migration that results in ground water and other lithospheric pollution The removal of organics (COD, BOD), nutrients (NH4+-N, NO3-N) from leachate is usual prerequisites before it mixes with surrounding water body. Over the last few years, activated carbon based adsorption phenomenon has been attracted as an efficient approach in the wastewater treatment process. During the past decade, a sizeable amount of research investigations were carried out by various researchers on activated carbon adsorption for treatment of leachate. They have successfully applied the method in the removal of organic compound and NH4+-N from the sample. Activated carbon also acts as a useful material for separation of many refractory organics as well as heavy metals from the liquid phase. However, other carbon like materials such as rice husk, waste tea leaves, saw dust, bagasse ash etc. is less costly and alternately precursors as low cost carbonaceous adsorbent materials, which are being used to achieve equivalent efficiency of adsorptive leachate treatment. The present paper addresses state of environmental implications for leachate treatment by low-cost adsorption technology. It is deemed that the technology would be a very promising and potential tool for MSW landfill management leading to sustainable environmental conservation.

 

Keywords : Municipal solid waste, Landfill, Leachate, Toxic organics, Adsorption, Activated carbon

 

 

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