Bangalore generates around 3,500 tons of municipal solid waste (MSW) per day. The current waste management practices involve preliminary mechanical and biological treatment before landfilling. Assessment of the waste management practices followed by the municipality by using life cycle analysis (LCA) is presented in this study. LCA is also used in...
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... emission factors for gas power plant used in bioreactor landfill is taken from MOE (2005). Leachate emissions: A few major parameters of leachate representing the open dumps and conventional landfills of Bangalore are given in Table 6. The amount of leachate generated is assumed to be around 10% of precipitation for the landfill sites (Cabaraban et al. 2007) ...
The sustainable landfilling concept has several advantages over conventional waste management practices in addressing various socio-economic and environmental concerns. This study presents an overview of the sustainable landfilling concept and various unit processes associated with it. The waste management approaches followed in the city of Bangalore and the benefits of applying the sustainable landfilling concept are discussed. A review of the bioreactor landfills, landfill mining, and biocover systems are presented. Laboratory scale bioreactor studies on the degradation of mechanically and biologically treated waste of Bangalore city under anaerobic, aerobic, and semi-aerobic conditions are presented. The performance of bioreactor landfills and the selection of waste treatment units are greatly influenced by the municipal solid waste properties and hence are reviewed in the study.
The current practices of containing the waste in dumpsite/landfill are considered as unsustainable due to their negative impact on the environment, society and economy. Remediation of the existing open dumpsite into bioreactor landfills helps in recovering the valuable land area at a faster rate due to the reduction in the time required for waste stabilization process. The problem of leachate treatment can also be addressed effectively during the remediation process. Therefore, remediating an existing dumpsite can be classified as an approach towards achieving the sustainability in landfilling practices. In this study, an approach for remediating an existing municipal solid waste (MSW) dumpsite in Bangalore city is presented by addressing the three major aspects, viz., landfill gas (LFG), leachate and the recovery of air space. Modelling tools are used to estimate the LFG emission and to design the leachate collection and recirculation systems. The methane oxidation potential of the digested MBT waste as a biocover material is evaluated using column experiments. The biocover systems are then designed to mitigate the LFG emissions from the dumpsite.