“…Leachate is classified as stabilized (mature), intermediate, or fresh (young) given BOD 5 /COD values of <0.2, 0.2-0.5, and >0.5, respectively (Robinson et al, 1983;Sun et al, 2010;Pilli et al, 2011). Some methods have been reported for the removal organics from landfill, such as biological treatment (aerobic, anaerobic and anoxic processes), physical methods (sedimentation, air stripping, adsorption, and membrane filtration) (Çeçen et al, 2003;Dehghani et al, 2007) and chemical methods (chemical precipitation (Lim et al, 2009;Kettunen et al, 1996), chemical oxidation (Zhao et al, 2010;Kurniawan et al, 2006), reverse osmosis, granular activated carbon (Peixoto et al, 2010), ion exchange R E T R…”