Study of dysfunction into activated sludge basins in sewage treatment plant of the City of Khouribga (Morocco (original) (raw)
2020, Journal of Materials and Environmental Science
The wastewater treatment and reuse plant of the city of Khouribga (WWTP) carry out a biological treatment of urban waste water in the city. The activated sludge treatment process is the process adopted at the Khouribga WWTP. This treatment is carried out at two aeration basins. Although the purifying performance of the WWTP and the reliability of this process are proven, several types of biological dysfunctions of the aeration basins can appear. The results of the biological treatment obtained showed that the elimination yield of the physicochemical parameters was 92; 98.4; 96.5 and 97.1 respectively for COD, BOD5, TSS and turbidity. Generally, the main dysfunction noted in the aeration basin of the WWTP is the proliferation of filamentous bacteria associated with poor settling. This swelling problem leads to poor settling of the mud following an increase in the volume occupied by it. Significant filamentary development severely limits the hydraulic capacity of the clarifier and can cause sludge to leave the natural environment.
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