PL EN
Investigation of the Physico-Chemical Quality of the Wastewater in Fez City (Morocco) Using a Multivariate Statistical Method
 
Więcej
Ukryj
1
Laboratory of Engineering, Molecular Organometallic Materials and Environment, Faculty of Sciences Dhar El Mahraz (FSDM), Sidi Mohamed Ben Abdellah University (USMBA), Fez, Morocco
2
Laboratory of Biotechnology, Faculty of Sciences Dhar El Mahraz (FSDM), Sidi Mohamed Ben Abdellah University (USMBA), Fez, Morocco
AUTOR DO KORESPONDENCJI
Faiçal El Ouadrhiri   

Laboratory of Engineering, Molecular Organometallic Materials and Environment, Faculty of Sciences Dhar El Mehraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
 
Ecol. Eng. Environ. Technol. 2022; 6:15–25
 
SŁOWA KLUCZOWE
DZIEDZINY
STRESZCZENIE
Similar to countries with arid and semi-arid climates, Morocco faces problems of degradation of the quality of its environment and more specifically the quality of groundwater. In this work, we approached the physico-chemical characterization of the raw effluents of three industrial units of the city of Fez, namely the textile industry (U1), the copperware industry (U2), olive oil industry (U3) chosen for their degree of pollution and their environmental impact, the aim of which is to highlight the degree and nature of the pollution generated by these effluents, and their biodegradability during the winter period January to February of 2018, when the waste water treatment plant (WWTP) is malfunctioning. A set of samplings and measurements of different physico-chemical pollution parameters were carried out such as: temperature, pH, electrical conductivity, turbidity, salinity, chlorides, BOD5, COD, suspended solids (SS), Ca2+, K+, as well as heavy metals. The results show that the U3 effluent is highly loaded in organic matter with high COD (37600 mg O2/L) and BOD5 (13000 mg O2/L), while the U2 effluent contains very high concentrations of heavy metals (Pb, Ni, Zn, Cu, Cd) 91,8, 71, 55,4, 53, 28 mg/L, respectively. on the other hand, the U1 effluent is characterized by high SS contents, and concentrations of Ca2+, K+ exceed Moroccan standards. The COD/BOD5 ratio shows that U1 and U2 effluents are difficult to biodegrade even if their organic loads are low. In the light of these results, it is recommended that these discharges be pre-treated before they are discharged into the liquid sewer system.