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SLOW SAND FILTER (SSF), RAPID SAND FILTER (RSF), PHYSICAL, CHEMICAL &…
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CHEMICAL & BIOLOGICAL
pH
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BASIC
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Precipitate on piping, dishes & laundry basin
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Dissolved Oxygen (DO)
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Respiration by aquatic animals, decomposition of organic material & chemical oxidation
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CHEMICAL & BIOLOGICAL
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Nutrients
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Agriculture, wildlife wastes, industry
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SEDIMENTATION
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4 Zones in Settling Tank
INLET ZONE
Provide a smooth transition from influent flow to the tank and to prevent short circuiting in the tank
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FILTRATION
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Solid liquid separation process in which the liquid passes through a granular media to remove fine suspended solids
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SCREENING
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To prevent damage/clogging to the pump, pipe, valve and etc
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High BOD, Low DO, polluted
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:star:The amount of oxygen consumed by microorganisms to decompose organic matter under aerobic condition at particular temperature and period of time :star:
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:star:The amount of oxygen equivalents consumed in chemical oxidation of inorganic and organic matter by strong oxidizing agent (Potassium Dichromate) :star:
Nitrogen, Phosphorus & Potassium
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As, Cd, Cr, Cu, Ni, Pb & Hg
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Choose the right coagulant among ALUM, FERRIC SALTS & POLYMER accordingly
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Higher temperature, faster reaction
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