Sewage Treatments

Sewage Treatments

1. What happens if it gets into waterways?

   • Bacteria contained in the sewage grow
     • Causes eutrophication
       • Fish Die

2. Treatment

   • Passed through screens
     • These trap the large particles
       • e.g. grit
   • Left in settlement tanks
     • insoluble particles go to bottom and form sediment
   • Trickling filters
     • Protocists feed on soluble bacteria

3. Definition

   • a waste liquid which has come from houses, industry and other parts of village, towns and cities