Resumo

CHAVEZ-PORRAS, Álvaro; RAMIREZ-CONTRERAS, Tatiana  e  CASALLAS-ORTEGA, Nicolás. Nitrification in the treatment of leachate sludges in a discontinuous sequential biological reactor - SBBR. Rev. P+L [online]. 2018, vol.13, n.1, pp.75-82. ISSN 1909-0455.  https://doi.org/10.22507/pml.v13n1a8.

Landfills provide a technique for the effective disposal and treatment of solid waste; they generate leachates by means of the degradation of organic matter and the percolation of rainwater. It is possible to treat the sludge generated from the treatment of leachates through a Discontinuous Sequential Biological Reactor - SBBR, oxidizing the substrate and favoring degradation and nitrification. The objective of the study is the biological treatment of leachate sludge from Doña Juana Sanitary Landfill, Bogotá D.C - Colombia, through an SBBR, to achieve the reduction of environmental impacts. A pilot system was used, with 10 mud replacements (one per week) in 70 days. The aeration system was controlled by means of parameters such as pH, temperature and dissolved oxygen that determined the correct biological activity. A reduction of 40% of the total nitrogen in the final sludge mixture was achieved. A BOD reduction of 99.6% and a COD reduction of 98% for the final clarification were also obtained. This allows us to conclude that, with the incorporation of extended aeration, the biological process allows the mitigation of the contaminant load.

Palavras-chave : Nitrification; leachate sludge; biological treatment; Discontinuous SequentiaL Biological Reactor.

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