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The XIGAT°° Concept and Operation Manual I IX-FLOW Start-up Procedure To prevent dehydration and growth of bacteria, the membrane elements are saturated with a water/glycerine/sodium bisulfite solution (79:20:1 [wt/wt/wt%]). This solution should be flushed out before use, according the following flush procedure: • Connect clean water (preferably drinking water quality or better) to feed. • Open feed and concentrate valves, and flush during 5 minutes without permeate flow. • Reduce feed flow and open permeate valve. Start filtration and adjust permeate flow to 50 I/m2h. Let the system filtrate for 15 minutes. • Perform a backwash for 30 seconds. Adjust the backwash flow to 50 I/m2h. • Start filtration , adjust permeate flow to 80 I/m2h. and let the system filtrate for 15 minutes. • Perform a backwash for 30 seconds. Adjust the backwash flow to 80 I/m2h. • Start filtration, adjust permeate flow to 100 I/m2h. and let the system filtrate for 15 minutes. • Perform a backwash for 30 seconds. Adjust the backwash flow to 100 I/m2h. • Start filtration and adjust permeate flow to 100 I/m2h. let the system filtrate for 15 minutes. • Perform a backwash for 30 seconds. Adjust the backwash flow to 200 I/m2h. • Start filtration, adjust permeate flow to 100 I/m2h. Let the system filtrate for 15 minutes. • Perform a chemical enhanced backwash (CEB) with 100 ppm active chlorine (NaOCI). - 30 seconds backwash with a flux of 200 I/m2h - 30 seconds backwash with a flux of 125 I/m2h plus NaOCI dosing - 5 minutes soaking - 30 seconds backwash with a flux of 200 I/m2h • Start filtration, adjust permeate flow to design flux. Let the system filtrate for 15 minutes. • Perform a Backwash for 30 seconds. Adjust the backwash flow to design flux. Note: Always keep TMP during filtration <0.5 bar. In total a volume of 150 I. of clean water per m2 membrane area is needed to perform this flush procedure. The system is now ready for use. CAPF-XIGA-0143