Wastewate r Treatment Technology

1. Wastewater Treatment Technology By Rudra Narayan Gooptu

2. Introduction Wastewater treatment refers to the process of removing pollutants from water and the techniques used to remove the pollutants can be categorized as biological, chemical, physical and energetic

3. Primary Wastewater Treatment Primary wastewater treatment consists of:

4. Screening • Passing influent through screens • Effluent contains waste water without large objects Screening Effluent Influent

5. Comminutor • Influent passes through a rotating cutter • Large pieces are broken down and passed into effluent

6. Grit Chamber

7. Secondary Wastewater Treatment Secondary wastewater treatment consists of:

8. Aeration tanks Secondary Aeration

9. Tertiary Wastewater Treatment Tertiary wastewater treatment consists of:

10. Disinfection Processes involved are:

11. UV-Disinfection

12. Coagulation Steps involved are:

13. Process Of Coagulation

14. Membrane Filtration The filtrate comes out and residues remain in the filter It Includes:

15. Constructed Wetlands These Include:

16. Constructed Wetlands Gravel and humus Wetland plants Soil Micro organisms Soil surface Influent Waste water Treated Water Effluent Bed rocks

17. Waste water treatment plant View of a plant from above

18. Sequential diagram of all processes Larger chunks Smaller bits Screens Grit Smaller bits Sediments Influent Waste water Screening Comminutor Grit chamber Sedimentation tank Disinfectant Source of UV rays particles Smaller bits Disease causing Pathogens Pathogens Sediments Micro organisms surrounding particles Aeration tank Secondary clarifier UV Disinfection Disinfection Addition of coagulant Precipitate Filter Gravel and humus Wetland plants Bed rocks Aggregation of smaller particles Soil bacteria Treated water Effluent Coagulation Membrane Filtration Constructed Wetlands

19. Thank You