| 摘要 |
<p>PURPOSE: A system for treating highly concentrated landfill leachate with high performance is provided by additionally installing microorganism media and submerged hollow fiber membrane module in a conventional post-treating facilities for landfill leachate. CONSTITUTION: The system for treating highly concentrated landfill leachate includes: an anaerobic tank(2) into which raw leachate and MLSS(mixed liquor suspended solid) are introduced; an anoxic tank(3) for denitrification; an aerobic tank(4) where organics are converted into carbon dioxide and water, and NH3 is converted into NO3¬-; a diffuser(17) to supply oxygen required to organic decomposition and nitrification; a draft tube(5) to recycling NO3 to the anoxic tank, thereby denitrifying the NO3 into N2 gas, wherein raw leachate is used as organic source. In the system, microorganism media that is selected from polyurethane, polysulfone and their derivatives(15) has a specific gravity of 20 to 80kg/m¬3 and a volume of 0.1 to 100cm¬2. Also, a submerged hollow fiber membrane module(6) under operated at a pressure of 0.1 to 0.4kgf/cm¬2, and it is treated to be hydrophilic. MLSS concentration of the aerobic tank is 10,000 to 20,000mg/L.</p> |
