In situ aeration method for a short period (1~2 weeks) has already been used for the reduction of... more In situ aeration method for a short period (1~2 weeks) has already been used for the reduction of odors and methane concentrations in solid waste landfill mining projects. Unfortunately, this method may lead to dry out moisture that would be detrimental to biological decomposition. Addition of leachate or food wastewater in landfill is suggested as a method to accelerate biological stabilization of organic wastes. Full-scale application of this method, however, has been hampered by an inability to uniformly apply moisture to the waste mass or by corrosion of water supply systems. A dry-fog system that produces gaseous moisture (liquid moisture content of fog 0.01g/m, less than 10 um in diameter) can transfer moisture into landfill uniformly, and also dry fog is not easily liquefied. It seems that dry-fog system is more effective method than conventional leachate recirculation and in-situ aeration methods because dry-fog system can effectively provide moisture under aerobic condition...
Field study was conducted for 5 months to investigate the effect of leachate recirculation on aer... more Field study was conducted for 5 months to investigate the effect of leachate recirculation on aerobic landfill stabilization at active landfilling site. The area of field experiment was 24×24 m and 9 vertical air injection wells with screen ranging 3~9 m were installed. Aerobic landfill operation for 5 months increased average internal landfill temperature to 70 °C and 8 % of landfill height was settled down. 94 m3 of leachate was recirculated for 1 month to increase moisture content of landfill to favor microbial degradation of organic matter, which resulted in temporary increase of groundwater level and anaerobic environment. But leachate recirculation triggered increase of internal landfill temperature of neighboring monitoring well. Because excessive leachate recirculation decreased internal landfill temperature by cooling effect, internal landfill temperature should be checked to avoid abrupt decrease of temperature during leachate recirculation. Also, to prevent anaerobic envi...
In situ aeration method for a short period (1~2 weeks) has already been used for the reduction of... more In situ aeration method for a short period (1~2 weeks) has already been used for the reduction of odors and methane concentrations in solid waste landfill mining projects. Unfortunately, this method may lead to dry out moisture that would be detrimental to biological decomposition. Addition of leachate or food wastewater in landfill is suggested as a method to accelerate biological stabilization of organic wastes. Full-scale application of this method, however, has been hampered by an inability to uniformly apply moisture to the waste mass or by corrosion of water supply systems. A dry-fog system that produces gaseous moisture (liquid moisture content of fog 0.01g/m, less than 10 um in diameter) can transfer moisture into landfill uniformly, and also dry fog is not easily liquefied. It seems that dry-fog system is more effective method than conventional leachate recirculation and in-situ aeration methods because dry-fog system can effectively provide moisture under aerobic condition...
Field study was conducted for 5 months to investigate the effect of leachate recirculation on aer... more Field study was conducted for 5 months to investigate the effect of leachate recirculation on aerobic landfill stabilization at active landfilling site. The area of field experiment was 24×24 m and 9 vertical air injection wells with screen ranging 3~9 m were installed. Aerobic landfill operation for 5 months increased average internal landfill temperature to 70 °C and 8 % of landfill height was settled down. 94 m3 of leachate was recirculated for 1 month to increase moisture content of landfill to favor microbial degradation of organic matter, which resulted in temporary increase of groundwater level and anaerobic environment. But leachate recirculation triggered increase of internal landfill temperature of neighboring monitoring well. Because excessive leachate recirculation decreased internal landfill temperature by cooling effect, internal landfill temperature should be checked to avoid abrupt decrease of temperature during leachate recirculation. Also, to prevent anaerobic envi...
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