Cascade Water Treatment system and mass balance Fe and Mn
Published on by AMTRIS HARDYANTO, Water-Wastewater Specialist in Case Studies
Dear all expert,
I just learn and curious how to reduce Fe using a cascade type rectangular water treatment system that can reduce Fe or Mn? The source of raw water from Groundwater tubewell capacity 200 m3 per hour with influent Fe 6 ppm , the process from Raw water - Cascade-Sedimentation - Sand Filtration-Clear Water-OHT ? can help me or if have reference really helpful, Regards and Stay healthy for you all
Taxonomy
- Water Supply
- Urban Water Supply
2 Answers
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Use cavitation. Effective, sustainable, no chemicals and small footprint,
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If the iron and manganese is in the reduced form in ground water, then it needs to be aerated to oxidise it. The other alternative is to dose sodium hypochlorite to oxidise the metals. There are better materials to remove the metals than sand filtration. Base Iron Removal Media (BIRM), Green Sand or Fylox are all better than sand itself. If the iron or manganese is of bacterial origin, then a better material to use is AFM (Active Filtration Media) which is based on recycled glass and has a coating on the surface. Sand itself can be used but bacteria will start coating the surface of the grain, which will increase backwash time, whereas AFM does not suffer from the same problem because bacteria don't grow on the surfaces the same.