and. watertreatmentwastewatertreatment water treatment & wastewater treatment
TRANSCRIPT
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ANDAND
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WaterWater TreatmentTreatment & WastewaterWastewater TreatmentTreatmentWaterWater TreatmentTreatment & WastewaterWastewater TreatmentTreatment
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Suggested StepsSuggested Steps inin WaterWater PurificationPurificationSuggested StepsSuggested Steps inin WaterWater PurificationPurification•Water comes from the stream
•Settling pond - Al2(SO4)3 - ALUM - added to pull clay
particles downward•Filtration - passing it through porous material (sand)•Adsorption - use of Carbon to remove organic pollutants•Biological oxidation - use of bacteria & microbes - oxygen helps the organisms grow & eliminate colloidal particles
•Disinfection - addition of Chlorine, Ozone, or UV to eliminate harmful pathogens•Voluntary fluoride treatment & storage in water tower for drinking water
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WaterWater TreatmentTreatment (forfor drinkingdrinking)WaterWater TreatmentTreatment (forfor drinkingdrinking)
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FamilyFamily WaterWater UseUseFamilyFamily WaterWater UseUse
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WastewaterWastewater TreatmentTreatment DiagramDiagramWastewaterWastewater TreatmentTreatment DiagramDiagram
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StepsSteps inin WastewaterWastewater TreatmentTreatmentStepsSteps inin WastewaterWastewater TreatmentTreatment•Wastewater sent to plant through sanitary sewer pipes•Pre-treatment - bar screen removes debris•Primary 1: settling tank- (removes grit), 2: clarifier- (lets sludge settle while oil is removed by use of a skimmer)•Secondary - 1: aeration tank -(colloids & organics removed by hungry bacteria -aeration increases bacterial growth - substance produced called activated sludge), 2: clarifier- (lets activated sludge settle - some is reused in aeration tank & the rest goes to anaerobic digester), 3: disinfection- (by Chlorine, Ozone, or sunlight in Wetland) •Tertiary - removal of chemicals (P, N, etc) - not required!•Anaerobic digester - sludge from primary and secondary treatment breaks down waste further and can then be disposed in a landfill or treated and used as fertilizer•Water returned to the stream
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Primary Treatment - Clarifier Primary Treatment - Clarifier Primary Treatment - Clarifier Primary Treatment - Clarifier
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PrimaryPrimary TreatmentTreatment (OilOil SkimmerSkimmer)PrimaryPrimary TreatmentTreatment (OilOil SkimmerSkimmer)
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Secondary TreatmentSecondary Treatment - Biological OxidationBiological Oxidation (Aeration Tank)Aeration Tank)
Secondary TreatmentSecondary Treatment - Biological OxidationBiological Oxidation (Aeration Tank)Aeration Tank)
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SecondarySecondary TreatmentTreatment (TricklingTrickling)SecondarySecondary TreatmentTreatment (TricklingTrickling)
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After Anaerobic Digestion of Sludge & After Anaerobic Digestion of Sludge & Activated Sludge - UsesActivated Sludge - Uses
Biogas - produced (along with sludge) during anaerobic digestion - can be used as a source of fuel for energy
Co-composting -- combined post-consumer waste paper with treated sludge (then decomposed by bacteria) for use as fertilizer for animal crops only
Pasteurization - drying sludge in ovens to kill pathogens (treated), then can be made into pellets and sold as fertilizer
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RestoredRestored OrlandoOrlando WetlandsWetlandsRestoredRestored OrlandoOrlando WetlandsWetlands
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Natures Method of Water TreatmentNatures Method of Water Treatment
•Settling ponds to collect large particles•Filtration by percolating water through soil•Soil and humus absorb organic nutrients
•Biological filters - bacteria, microbes in soil & water eat dissolved organic material
•Disinfection - sunlight over 1 week’s time provides the needed UV to kill pathogens•In other words -- a WETLAND area!In other words -- a WETLAND area!
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TheThe ValueValue ofof WetlandsWetlandsTheThe ValueValue ofof WetlandsWetlands•Filter Toxic Waste, sediment, nutrients•Help prevent erosion
•Reduce flooding by storing storm water
•Reduce storm damage- absorb waves
•Feeding, resting spot for migratory birds
•Provides nesting grounds for aquatic species
•Provide food & habitat for aquatic species