NOVELTY - The treatment system (100) comprises a unit for treating landfill leachate with enzymes, a landfill gas recapture device (116) distinct from a landfill mass for contacting a treated landfill leachate with an extracted landfill gas in the recapture device and for facilitating absorption of hydrogen sulfide in the landfill gas, a unit (110) for recirculating a first portion of a spent landfill leachate laden with the absorbed hydrogen sulfide to the recapture device, a flash chamber (118) for subjecting the treated landfill gas to flare.    USE - The system is useful for treating landfill gas using landfill leachate to remove hydrogen sulfide in petroleum energy industries e.g. oil field operations, manufacturing industries e.g. steel plant coke oven gas, mining operations to clean the coal seam gas or sour gas in gold, silver and helium, geothermal energy industries for conditioning municipal and industrial waste water, and pulp and paper mill industries, where the landfill gas is used as a natural gas substitute.    ADVANTAGE - The system is capable of economically treating the landfill gas using leachate with reduced or eliminated corrosion problems and exhaust gas emission problems and without producing toxic or bad odor and reducing landfill carbon footprint by accelerating the release of biogenic carbon thus preventing the unconsciousness and death of the worker.    DETAILED DESCRIPTION - The treatment system (100) comprises a unit for treating landfill leachate with enzymes, a landfill gas recapture device (116) distinct from a landfill mass for contacting a treated landfill leachate with an extracted landfill gas in the recapture device and for facilitating absorption of hydrogen sulfide in the landfill gas, a unit (110) for recirculating a first portion of a spent landfill leachate laden with the absorbed hydrogen sulfide to the recapture device, a flash chamber (118) for subjecting the treated landfill gas to flare and for subjecting a portion of the landfill gas to flash from the recapture device, a unit (102) for storing landfill leachate, a unit for heating the treated landfill leachate, a nozzle for introducing the landfill gas into the recapture device, a first pump for withdrawing a first portion of the spent landfill leachate laden with absorbed hydrogen sulfide from the landfill gas recapture device, a second pump for recycling a regenerated landfill leachate from the recirculation unit to the recapture device, a third pump for disposing a second portion of the spent landfill leachate laden with absorbed hydrogen sulfide to the landfill, a landfill gas recapture device chemical storage unit for introducing additives to the first portion of the spent landfill leachate in the recirculation unit, and a treatment chemical storage unit for storing the enzymes. The landfill gas comprises two components of which one component is chemically reacting with the landfill leachate to form the spent landfill leachate and a treated landfill gas. A pH sensor is attached to the treatment unit for determining the pH level of the leachate in the treatment unit, and to the recirculation unit for determining the pH level of the leachate in the recirculation unit. The enzymes adjust the pH of the landfill leachate in accordance with the pH sensor coupled to the treatment unit. The pH of the first portion of the spent leachate is mixed with the leachate in the treatment unit in accordance with the pH sensor coupled to the recirculation unit. The landfill gas recapture device comprises a vertical column for directing landfill leachate in a downward direction in a counter-current manner.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a landfill gas treatment system.    Treatment system (100)    Storage unit (102)    Recirculation unit (110)    Landfill gas recapture device (116)    Flash chamber. (118)