Dual Media filter vs Pressure sand filter

[kwisatz_haderach]

Hi guys, please help a novice learner understand which is best. We have a requirement for filtering surface water that is high in TSS (around 100 PPM and trubidity (30 NTU). We contacted three suppliers and one has given pressure sand filter (PSF) followed by activated carbon filter (ACF), while the 2nd supplier suggested to go with Multi grade filter filled by ACF, while the third one has suggested Dual Media filter followed by ACF. Three suppliers are telling me that theirs is the best solution for our requirement. I can't able to choose between them. Please help. Based on your experience which you will choose?

 

[pierreick]

Get a chemical engineer involved!
Sand filter is for raw water, coarse filtration, AC filter is a polishing filter.
Good luck
Pierre