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vices are designed to complement ASCEs traditional civil engineering base and to attract new categories of members who seek to enhance their professional and technical develop- ment in the fields of environmental and water resource engineering.the public.2 Slow sand filters were first used in London in 1820 to treat water from the River Thames. From about the 1930s water treatment by coagulation and rapid gravity filtration or pressure filtration tended to replace slow sand filtration in new plants andin some casesslow sand filters were replaced by rapid gravity filters The analyzes were carried out as single-phase and two-phase and Reynold Stress Model (RSM) was used as the turbulence model. Cyclone models with different helix angles have been designed
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