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. 2016 Dec 2;6:38103. doi: 10.1038/srep38103

Figure 7.

Figure 7

Changes of COD (a) DOC (b) pH (c) and VFA (d) in leachate from simulated landfills (AL: anaerobic landfill; RAL: anaerobic landfill with leachate recirculation; ASL: anaerobic landfills being switched to semi-aerobic mode after day 175; RASL: anaerobic landfills being switched to semi-aerobic mode after day 175 with leachate recirculation; SL: semi-aerobic landfill; RSL: semi-aerobic landfill with leachate recirculation).