Abstract:
This study aims to assess the quality of raw and treated wastewater in the El Meniaa province by comparing it
to national (JORA) and international (
OMS) standards. Physico-chemical and bacteriological analyses were conducted over a five-month period
(January to May) on domestic effluents treated by a natural lagoon-based biological treatment plant serving the
municipalities of Meniaa and Hassi El Gara.
The results indicate compliance with parameters such as temperature, pH, nitrites, nitrates, and phosphorus. However,
BOD₅ (39 mg/L) and suspended solids (42.8 mg/L) exceed the permissible limits. Removal efficiencies reached 53.4%
for BOD₅, 47.5% for COD, 53% for suspended solids, and over 98% for coliforms. These findings suggest partial
treatment effectiveness, highlighting the need for further improvements to ensure compliant discharge and support the
sustainable reuse of treated wastewater.
