Various sources of environmental pollution, especially in
countries less aware of health risks, are caused by the growth of population,
economy and urbanisation. Among these pollutants, wastewater is often
discharged into the receiving environment without any treatment. The aim of
this research is to analyse the physico-chemical and bacteriological properties
of both raw and treated wastewater from the wastewater treatment plant (WWTP)
in Errachidia, Morocco, throughout the year 2020, to assess the efficiency of
the treatment process of the aerated lagoon system and to examine the potential
for irrigation reuse. The average monthly data from January to December 2020
for the physico-chemical tests of treated wastewater are as follows: BOD5 =
94.45 mg O2/L; COD = 339.32 mg O2/L; SS = 87.67 mg/L. The findings indicate
that these results meet the general discharge limit values for Moroccan surface
waters, thereby contributing to environmental protection. Furthermore, the
bacteriological findings reveal the presence of various microorganisms with
average annual values where faecal coliforms (CF) are 680 CFU/100 ml; total
coliforms (CT) are 2810 CFU/100 ml, and faecal streptococci are 46 UFC/100 ml,
all of which are the recommended limit values set by Moroccan irrigation
regulations (CF < 1000 CFU/100 ml), making them suitable for use in
irrigation. It is recommended to adopt a tertiary treatment and disinfection to
obtain treated water of acceptable microbiological quality for reuse in
irrigation, allowing the protection of agricultural users and consumers of
crops.
Author(s) Details
Ouhammi M.
Laboratory of Biotechnology, Environment, Agro-food and Health (LBEAS),
Faculty of Sciences Dhar EL Mehraz, Sidi Mohamed Ben Abdellah University, Fez,
Morocco.
Merzouki M.
Laboratory of Biotechnology, Environment, Agro-food and Health (LBEAS),
Faculty of Sciences Dhar EL Mehraz, Sidi Mohamed Ben Abdellah University, Fez,
Morocco.
Belhassan H.
Laboratory of Biotechnology, Environment, Agro-food and Health (LBEAS),
Faculty of Sciences Dhar EL Mehraz, Sidi Mohamed Ben Abdellah University, Fez,
Morocco.
Please see the book here:- https://doi.org/10.9734/bpi/crgese/v1/5719
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