Water Cycle Nebel & Wright 1998. Luckily, receiving waters i.e. reservoirs, lakes and rivers between...
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Transcript of Water Cycle Nebel & Wright 1998. Luckily, receiving waters i.e. reservoirs, lakes and rivers between...
Water Cycle
Nebel & Wright 1998
Nebel & Wright 1998
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.
Water Treatment Criteria
Taste - acceptable
http://www.info.gov.hk/wsd/stat/2002stat/consump.htm - control
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Nebel & Wright 1998
Water Treatment Processes (e.g. Shatin Treatment Works)
Involve 9 major stages:
Chlorination Flocculation/ coagulationClarificationFiltrationFilter-backwashpH adjustmentChlorinationFluoridisationFinal clarifying
Hammer & Hammer 2001
Reverse osmosis/ Ultra-filtration
Hammer & Hammer 2001
Reverse osmosis/ Ultra-filtration