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Biodegradation and Detoxification of Sanitary Landfill Leachate by Stabilization Ponds System
Author(s) -
Costa Rejane H. R.,
Martins Cláudia L.,
Fernandes Heloísa,
Velho Viviane F.
Publication year - 2017
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14798353399052
Subject(s) - leachate , chemical oxygen demand , biodegradation , biochemical oxygen demand , effluent , facultative lagoon , aeration , environmental chemistry , chemistry , bioreactor , stabilization pond , environmental science , waste management , toxicity , anaerobic exercise , environmental engineering , contamination , pulp and paper industry , wastewater , ecology , biology , physiology , organic chemistry , engineering
The performance of a pilot stabilization ponds system was evaluated for the treatment of sanitary landfill leachate, focusing on effluent detoxification. Three serial ponds (anaerobic—P1, facultative—P2, and maturation—P3) were evaluated during two different operational conditions: natural condition (period 1) and 24 hours of artificial aeration in P2 (period 2). The ponds system exhibited removal efficiencies of 53% for soluble chemical oxygen demand (SCOD), 81% for filtered biochemical oxygen demand (FBOD), and 84% for NH 4 + ‐N during period 1 and 70% for SCOD, 80% for FBOD, and 96% for ‐N during period 2. Most metals (Fe, Cu, Cd, Zn, Cr, Ni, and Pb) and organic compounds in the leachate were significantly reduced in the treatment system, with greater reductions during period 2. Moreover, toxicity tests demonstrated the capacity of the system to reduce the toxicity of the raw leachate (up to 89% toxicity reduction).