Abstract
Evaluation of an appropriate technique for municipal wastewater purification to produce an effluent suitable for different reuses were carried out. Two‐stage pilot plant schemes were investigated. The first stage was direct chemical coagulation‐sedimentation of primary effluent using ferric chloride to reduce the organic load and to remove the suspended solids. The second stage was a tertiary treatment of the effluent produced from the first stage via high rate oxidation pond (HIROP). In addition, algae removal using either chemical coagulation‐sedimentation with alum or centrifugation was achieved. The results obtained showed that the effluent produced from the first stage is amenable for irrigation purposes. Furthermore, the HIROP proved to be a satisfactory tertiary treatment method for the removal of pollutants. In addition, high algal biomass was obtained.
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