Resumo

BENITEZ FONSECA, Mabelín; ABAFOS RODRIGUEZ, Arelis; RODRIGUEZ PEREZ, Suyén  e  RAMIREZ VIVES, Florina. Anaerobic co-digestion of the organic fraction of urban solid waste and its leachate. Rev. colomb. biotecnol [online]. 2020, vol.22, n.2, pp.70-81.  Epub 20-Fev-2021. ISSN 0123-3475.  https://doi.org/10.15446/rev.colomb.biote.v22n2.70345.

Urban solid waste (MSW), when are discharged without proper treatment, causes severe damage to the environment, influencing the population's quality of life. For this reason, attention is currently paid to the proper handling of this waste. This paper studies the reduction of the organic fraction of solid waste (OFMSW), generated by a population group, taking as reference one of the Student Residences of the Universidad de Oriente. The generation of OFMSW in the residence is 0.06 kg/inhabday, with a total solid content of 30.9 ± 5.3%, of which 81.7 ± 0.6% are volatile solids. The anaerobic digestion of OFMSW is evaluated through a two-stage treatment system. The first stage is performed in a drained-bed batch reactor, which allowed discontinuous and in-situ treatment of OFMSW, in anaerobic co-digestion with 25% of cow manure. In a second stage, the anaerobic treatment for the leachates generated in the batch reactor is evaluated, using a UASB reactor. In the batch reactor a removal of volatile solids of 44.1% was achieved, while in the UASB reactor 81.2% of COD was removed. As a result of the evaluation of the treatment system, total productivity of 5.37 L CH4 -kgSV -1-d-1 was achieved.

Palavras-chave : anaerobic treatment; co-digestion; leachate; drained bed; solids removal; methane productivity.

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