Journal of
Environmental Chemistry and Ecotoxicology

  • Abbreviation: J. Environ. Chem. Ecotoxicol.
  • Language: English
  • ISSN: 2141-226X
  • DOI: 10.5897/JECE
  • Start Year: 2009
  • Published Articles: 189

Full Length Research Paper

Waste degradation and leachate quality on composting platform: A case study in Lome, Togo

Edem K. Koledzi
  • Edem K. Koledzi
  • Laboratoire GTVD (Gestion, Traitement et Valorisation des Déchets), Université de Lomé, BP 1515 Lomé-Togo.
  • Google Scholar
Martin P. Aina
  • Martin P. Aina
  • Laboratoire des Sciences et Techniques de l’Eau Université d’Abomey Calavi-Benin.
  • Google Scholar
Kwamivi N. Segbeaya
  • Kwamivi N. Segbeaya
  • Laboratoire GTVD (Gestion, Traitement et Valorisation des Déchets), Université de Lomé, BP 1515 Lomé-Togo.
  • Google Scholar
Maglwa Tcha-Thom
  • Maglwa Tcha-Thom
  • Laboratoire GTVD (Gestion, Traitement et Valorisation des Déchets), Université de Lomé, BP 1515 Lomé-Togo.
  • Google Scholar
Gnon Baba
  • Gnon Baba
  • Laboratoire GTVD (Gestion, Traitement et Valorisation des Déchets), Université de Lomé, BP 1515 Lomé-Togo.
  • Google Scholar
James T. Agbebavi
  • James T. Agbebavi
  • CACTAT (Centre Afrique Canada pour Transfert et Adaptation de Technologie) -Université de Québec à Trois-Rivières, QC, Canada.
  • Google Scholar


  •  Received: 29 July 2016
  •  Accepted: 05 October 2016
  •  Published: 30 November 2016

Abstract

Chemical or organic compounds released during the waste composting could be harmful to the environment. The purpose of this work is to investigate the stability indices of organic matter after the lixiviation runs on composting platforms. The results showed that the organic matter became resistant to biodegradation after 2 months of wastes composting, that the nitrates content decreased, while the phosphorus one increased. The organic load predominantly hydrophilic substances (HPI*) decreased significantly (p <0.05) during composting polymerizing into humic acids (AH characteristics of the leachate, such as a pH <8, a (BOD5/COD) ratio >0.1 and a (AH*+HPO*) content <50% pointed to the class of an intermediate leachate. However, the values of COD*) and hydrophobic substances (HPO*). The increase in (AH*+HPO*) fractions is correlated with Specific UV Absorbance (SUVA) value which rose from 4 to 25 L.gC-1.cm-1. Some <4000 mgO2.L-1, of SUVA >20 L.gC-1.cm-1 and an HPI* concentration <30% suggested a stabilized leachate. Thus, during the 4 months, the resultant compost although mature was not stable. The leachate characterization has permitted to understand both its quality and the state of the waste where it originates from, making it possible to prevent any chemicals leakage into the environment.

 

Key words: Waste, composting, organic matter, hydrophobic fractionation.