TEMPORAL EVOLUTION OF THE PHYSICO-CHEMICAL AND BIOLOGICAL LEACHATE QUALITY FROM THE DISCHARGE PUBLIC OF EL HAJEB TOWN (MOROCCO)

Authors

  • Abderrahmane Gamar, Zakaria Khiya, Touria Zair, Mohammed El Kabriti, Abdelaziz Bouhlal, Fatima El Hilali

Keywords:

physicochemical, biological, climate, parameter, leachate, evolution

Abstract

The wild public landfill of the city of El Hajeb (Morocco) constitutes the central installation of storage and solid waste disposal (domestic, hospitable and other). Enormous quantities of putrescible waste rejected in this discharge, generate very polluting leachates constituting a danger for the environment and in particular for the groundwater which circulates in low depth. This work aims to study the temporal variation of this discharge leachate quality. In this study, sampling was carried out on a monthly step during a hydrological cycle, which spread from May-2015 to January-2017. The climatic data revealed that the climate of the zone of study could be classified as a semi-continental climate in a semi-arid to arid bioclimatic level between temperate and warm. Statistical study by the principal components analysis (PCA) of temporal monitoring of various physicochemical and biological parameters revealed a dry episode was characterized by a maximum increase in biochemical oxygen demand (BOD5 max = 17000 mgO2/L), in salts (EC max = 27.19 mS/cm), nitrate (NO3- max = 78.09 mg/L), in total Kjeldahl nitrogen (TKN max = 968.11 mg-N/L), in total phosphorus (TP max = 157.12 mg-P/L), in metallic load (Fe max = 1069.54 mg/L, As max = 2.79 mg/L and Cd max = 0.61 mg/L) and in microorganisms (total coliform max = 4.37e+7 CFU/100mL); and a significant decrease in dissolved oxygen (DO min = 0.65 mg/L), in sulfate (SO4 min = 943.32 mg/L), in suspended matter (TSS min = 671.56 mg/l) and in turbidity (Turb min = 1983.67 NTU). This phenomenon was reversed in wet period. The dilution by rain and low temperatures contributed strongly to this change in the quality of the leachates. In deed the study revealed the significant correlations between temperature and report BOD5/COD (r = 0.88), between temperature and chlorides (r = 0.82), between temperature and sulfates (r = -0.88) and between precipitation (P) and Zn (r = 0.91), between (P) and Ni (r = 0.70) and between (P) and Al (r = 0.83). It resulted from it of this study that the combined effect of precipitation and temperature was an important factor among others that governed the evolution of the quality of the leachate generated.

Downloads

Published

2017-09-30

How to Cite

Abderrahmane Gamar, Zakaria Khiya, Touria Zair, Mohammed El Kabriti, Abdelaziz Bouhlal, Fatima El Hilali. (2017). TEMPORAL EVOLUTION OF THE PHYSICO-CHEMICAL AND BIOLOGICAL LEACHATE QUALITY FROM THE DISCHARGE PUBLIC OF EL HAJEB TOWN (MOROCCO). International Journal of Research Science and Management, 4(9), 25–36. Retrieved from http://ijrsm.com/index.php/journal-ijrsm/article/view/470

Issue

Section

Articles