Method for controlling landfill gas generation at waste landfill and its device

摘要

The present invention relates to a method for controlling landfill gas generation in a landfill and a device therefor, wherein the landfill gas continuously generated in the decomposition stabilization process of landfilled waste is generated in a landfill progress stage, a landfill completion stage, and a landfill stabilization stage. By properly monitoring and controlling conditions such as the temperature and acidity (pH) of the leachate recycled at each stage so as to keep it as constant as possible, the facilities for use such as refining or power generation facilities necessary for recycling the landfill gas A method of controlling landfill gas generation at waste landfills, which enables early recovery of facility investment costs by maximizing design, maximizes recycling efficiency of landfill gas resources, and stabilizes landfills early. It is an object of the present invention to provide an apparatus, and the present invention for achieving the above object is a closed In landfill gas generation amount control of the landfill how to recycle the leachate while continuously injected into the upper portion of the stack waste landfill gas extraction from the landfill gas extraction tube is configured in one way flowing out of the reclaimed water,;A first step of maintaining the temperature of the recycled leachate at 35 to 38 ° C. and the pH at 6.5 to 7.5 until the amount of landfill gas generation is 5 to 20% of the total amount of landfill gas generated from the entire landfill waste;;After the completion of the first step, the temperature of the recycled leachate is 30 to 35 ° C or 60 to 65 ° C until the landfill gas generation amount becomes 75 to 90% of the total amount of landfill gas generated from the entire landfill waste. A second step of maintaining 6 to 7,;After completion of the two-stage process, the temperature of the recycled leachate is 35 to 38 ° C. or 50 to 54 ° C. until the landfill gas generation amount reaches 100% of the total amount of landfill gas generated from the entire landfill waste, and the pH is 6.5. It provides a method and apparatus for controlling landfill gas generation amount of landfills, characterized in that it comprises a third step of maintaining from 8 to 8.