The wastewater treatment plant in Ujams treats industrial wastewater with a low municipal content. A membrane bioreactor (MBR) is used as the biological treatment stage. Since this process is very sensitive to contaminants, a functioning protective barrier must be installed upstream.
Fine screening with a drum microscreen (Passavant® CarbonExtract®) is suitable for this purpose.
Ujams, Namibia
Passavant® CarbonExtract®
New construction of a water treatment plant in Namibia, South Africa; microscreening as upstream protective barrier Passavant® CarbonExtract®.
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Situation
Solution
By controlling the surface aerators according to demand, the process stability in the wastewater treatment plant has improved significantly. This results in improved and less fluctuating effluent values for nitrogen compounds. In addition, an average saving of 5% in the overall electricity consumption of the treatment plant was achieved, even though additional agitators and pumps were put into operation. By integrating P precipitation into the control system, the P effluent value could be kept stable. However, the amount of precipitant used has been reduced by > 40%.
Technical Data
Noggerath® drum screen
RSH-MG 1600 x 3000
Drum diameter: 1600 mm
Drum length: 3000 mm
Advantages
- Compact mechanical pre-cleaning
- Reliable removal of particles, suspended and fibrous matter
- Optimal protection of sensitive membrane vitalisation
