1. Water Cycle Nebel & Wright 1998

5. Luckily, receiving waters i.e. reservoirs, lakes and rivers between source and treatment serve as a buffer, since they all have the capacity for self- purification, involving bacterial adsorption and sedimentation, predation, dilution, thermal effects, solar radiation and other factors. It’s most effective in warm temperatures and low rainfall.

6. Water Treatment Criteria Taste - acceptable http://www.info.gov.hk/wsd/stat/2002stat/consump.htm - control

7. Water Treatment Processes and Water Supply System 1 Nebel & Wright 1998

8. Water Treatment Processes (e.g. Shatin Treatment Works) Involve 9 major stages: Chlorination Flocculation/ coagulation Clarification Filtration Filter-backwash pH adjustment Chlorination Fluoridisation Final clarifying

9. Hammer & Hammer 2001 Reverse osmosis/ Ultra-filtration

10. Hammer & Hammer 2001 Reverse osmosis/ Ultra-filtration