Organics and nitrogen removal from recycled landfill leachate using an aerobic process

Subject Areas : environmental management

Mohammad Javad Zoqi ¹ , Mohsen Saeedi ²

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Received: 2008-11-10 Accepted : 2009-01-14 Published : 2011-04-03

Keywords: Anaerobic process, Well-decomposed refuse, NH4+-N, organic matters, Leachate,

Abstract :

One of the most popular types of bioreactor landfills is the landfill with leachate recirculation.In this way, an anaerobic was operated by leachate recirculation to remove organic matters. In this study two different systems were applied for leachate treatment. In system (1), the leachate generated from a fresh-waste reactor was drained to recirculation tank, and recycled every two days. In System (2), the leachate generated from a fresh waste landfill reactor was fed through a well-decomposed refuse landfill reactor, and at the same time, the leachate generated from a well-decomposed refuse landfill reactor recycled to a fresh waste landfill reactor. The results indicated that, the leachate NH4+-N and COD concentrations in system (1) accumulated to a high level, and, NH4+-N and COD removal were carried out successfully in system (2). In the well-decomposed refuse landfill reactor, the maximum organic removal rate was 1000and the maximum NH4+-N removal rate was 105. In system (2), the average removal efficiency reached to 85% and 34% for COD and NH4+-N, respectively.