Waste Water Treatment

• What kind of organic molecules does waste water contain?

  harmful microorganisms
• STEP BY STEP treatment

  1. it is screened through mesh (removed solids+grit)2. sewage sits in sedimentation tanks (semi solid sludge sinks), sludge is taken away and digested by anaerobic bacteria3. liquid effluent bacteria must be reduced so air is bubbled through effluent4. aerobic bacteria multiplies to digest organic molecules and harmful microorganisms5. now it can be safely discharged
• What can the sludge be used for?

  Biogas to burned for electricty
• Sometimes treated sewage is used to produce...

  potable water
• what is the easiest way to produce potable water?

  use ground water from aquifers
• what must you tests ground water for?

  fertilizers
• How difficult is it to produce potable water from sewage?

  not easy