WASTE WATER TREATMENT

How is wastewater produced

Urban lifestyles and industrial processed produce large amounts of waste water

How is **Sewage/Agricultural** wastewater treated

Removal of **organic matter + harmful microbes**

How is **Industrial** wastewater treated

Removal of **organic matter + harmful chemicals**

What are the **(4)** processes involved in sewage treatment

Screening and grit removal

Sedimentation: **produces sewage sludge, effluent**

Anaerobic digestion of **sewage sludge**

Aerobic biological treatment of **effluent**

Process of correct quality water production

Water passed through mesh screen, removes large bits

Chemicals added to make solids/microbes stick

Form sediment and sink

Anaerobic digestion of sewage sludge

Sterilised w/ chlorine, kills remaining microbes