The pretreatment system include Multi-medium filter,Active carbon filter,Softener (Options) ,precision filter,etc.
The multi-medium filter can remove the suspended substance, particles, total price iron and organic compound. Make the come out water quality meet the feeding water requirement’s of the RO installation.
The active carbon filter can absorb the former filter can’t remove remained chlorine to prevent the after stage RO membrane. At the same time absorb the organic substance, can decrease the SDI value in the RO feeding water. Assure the SDI<5,COD,2.0 ppm.
The softener can provide soft water for the reverse osmosis system to guarantee the stir of equipment by removing calcium ions and magnesium ions those can bring scale. Using double softeners, the system can run continuously so that water can be provide continuously when softener regenerating.

