... 20 Installation: Raw water pump+silica sand filter+active carbon filter+softener + micron filter+high pressure pump+RO system. Plant process: ... provide the pressure to silica sandfilter/active carbon filter 2. Silica Sand filter-- get rid of turbidity, suspended matter, organic ... matter, colloid and so on 3. Active Carbon filter--Remove the color, free chloride, organic matter, harmful matter ...