Unit 8: Waste ManagementSection 2: Wastewater Treatment
Where does wastewater come from?
Gray Water
•Some areas allow the use of gray water for watering plants and lawns•Gray water is wastewater from sinks, showers, and laundry that may be high in phosphate content (from soaps)
Septic Systems•Used in rural areas
Wastewater Treatment Process
Bacteria are aerated and break down most organic waste
Filters and tanks remove large particles and allow them to settle
Dumped into local waterway
Wastewater Treatment Plant
Wetlands as Wastewater Treatment
•Wetlands = natural wastewater treatment plants• Artificial wetlands - constructed
along coasts to aid in wastewater treatment (partially processed sewage pumped into wetlands)• Effluent has increased nutrients
which help marsh grasses grow, increasing size and strength of wetlands!!!
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