Project Detail
The Problems :
Square Pharmaceuticals, the largest pharmaceutical company in Bangladesh , had an existing pre-treatment to a Reverse Osmosis and UV system, which included :
- Multimedia filter
- Activated carbon column
- 5 micron cartridge filter
The main problem was Pseudomonas bacteria growth in sand and carbon filters
Technical Solution:
- Aeration of the ground water with a detention time of two (2) hours using Dryden Aqua Air Diffuser. Aeration capacity : 60 m3/hr
- Pre-coagulation of the water with Poly Aluminum Chloride (PAC), followed by mixing the chemical in a Dryden Aqua’s Zeta Potential Mixer (ZPM)
- Filtration with a pressure filter using Dryden Aqua Activated Filter Media (AFM®) Grade 1, at 5 meters/hour filtration velocity
- There is also Dryden Aqua DryOx treatment once a week to deal with bacteria in the aeration tanks, and on filter shell/laterals
