(US5888022-A)      Method for treating biodegradable waste in landfill by: (a) covering waste; (b) increasing and maintaining moisture content to 40% to 70%; (c) injecting oxygen to maintain aerobic activity; (d) increasing temperature of landfill to eliminate pathogens; controlling temperature to 130 to 150F to sustain aerobic degradation; and monitoring oxygen and moisture and temperature and varying these to maintain aerobic activity.    A process and a system are also claimed.    Preferably the following are typical. Moisture and oxygen are injected through grid of wells. Oxygen concentration is maintained above 0%. Temperature is controlled by varying amount of air injected. Leachate is recycled to maintain moisture content. Leachate is supplemented with make-up water. Temperature is raised to (a) 135F, (b) 135 to 145F, (c) above 155F. Gas generation rates are monitored. Methane generation rate is monitored to indicate aerobic degradation. Temperature is monitored to indicate state of degradation. Nitrogen and phosphate are added to maintain microbial growth. Carbon:nitrogen ratio is maintained at 20:1 to 50:1. Landfill is (a) closed, (b) landmined, after aerobic degradation has stabilised. Landfill is reused after landmining. Grid of gas and moisture wells are supplied from headers. One well houses detection devices. Grid of wells is divided into zones. Supplementing gas and liquids are added to enhance degradation.    USE -   Treating landfill waste to ensure rapid degradation.    ADVANTAGE -   Degradation of landfill waste takes place quickly so that land can be reused. Anaerobic degradation is eliminated. The landfill site can be used again for landfill, reducing demand for land. Treated landfill can be relocated.    (EP988093-A1)      Method for treating biodegradable waste in landfill by: (a) covering waste; (b) increasing and maintaining moisture content to 40% to 70%; (c) injecting oxygen to maintain aerobic activity; (d) increasing temperature of landfill to eliminate pathogens; controlling temperature to 130 to 150F to sustain aerobic degradation; and monitoring oxygen and moisture and temperature and varying these to maintain aerobic activity.    A process and a system are also claimed.    Preferably the following are typical. Moisture and oxygen are injected through grid of wells. Oxygen concentration is maintained above 0%. Temperature is controlled by varying amount of air injected. Leachate is recycled to maintain moisture content. Leachate is supplemented with make-up water. Temperature is raised to (a) 135F, (b) 135 to 145F, (c) above 155F. Gas generation rates are monitored. Methane generation rate is monitored to indicate aerobic degradation. Temperature is monitored to indicate state of degradation. Nitrogen and phosphate are added to maintain microbial growth. Carbon:nitrogen ratio is maintained at 20:1 to 50:1. Landfill is (a) closed, (b) landmined, after aerobic degradation has stabilised. Landfill is reused after landmining. Grid of gas and moisture wells are supplied from headers. One well houses detection devices. Grid of wells is divided into zones. Supplementing gas and liquids are added to enhance degradation.    USE -   Treating landfill waste to ensure rapid degradation.    ADVANTAGE -   Degradation of landfill waste takes place quickly so that land can be reused. Anaerobic degradation is eliminated. The landfill site can be used again for landfill, reducing demand for land. Treated landfill can be relocated.    (JP2001509735-W)      Method for treating biodegradable waste in landfill by: (a) covering waste; (b) increasing and maintaining moisture content to 40% to 70%; (c) injecting oxygen to maintain aerobic activity; (d) increasing temperature of landfill to eliminate pathogens; controlling temperature to 130 to 150F to sustain aerobic degradation; and monitoring oxygen and moisture and temperature and varying these to maintain aerobic activity.    A process and a system are also claimed.    Preferably the following are typical. Moisture and oxygen are injected through grid of wells. Oxygen concentration is maintained above 0%. Temperature is controlled by varying amount of air injected. Leachate is recycled to maintain moisture content. Leachate is supplemented with make-up water. Temperature is raised to (a) 135F, (b) 135 to 145F, (c) above 155F. Gas generation rates are monitored. Methane generation rate is monitored to indicate aerobic degradation. Temperature is monitored to indicate state of degradation. Nitrogen and phosphate are added to maintain microbial growth. Carbon:nitrogen ratio is maintained at 20:1 to 50:1. Landfill is (a) closed, (b) landmined, after aerobic degradation has stabilised. Landfill is reused after landmining. Grid of gas and moisture wells are supplied from headers. One well houses detection devices. Grid of wells is divided into zones. Supplementing gas and liquids are added to enhance degradation.    USE -   Treating landfill waste to ensure rapid degradation.    ADVANTAGE -   Degradation of landfill waste takes place quickly so that land can be reused. Anaerobic degradation is eliminated. The landfill site can be used again for landfill, reducing demand for land. Treated landfill can be relocated.