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Wastewate r Treatment Technology . By Rudra Narayan Gooptu. 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.
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Wastewater Treatment Technology By Rudra Narayan Gooptu
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
Primary Wastewater Treatment Primary wastewater treatment consists of:
Screening • Passing influent through screens • Effluent contains waste water without large objects Screening Effluent Influent
Comminutor • Influent passes through a rotating cutter • Large pieces are broken down and passed into effluent
Secondary Wastewater Treatment Secondary wastewater treatment consists of:
Aeration tanks Secondary Aeration
Tertiary Wastewater Treatment Tertiary wastewater treatment consists of:
Disinfection Processes involved are:
Coagulation Steps involved are:
Membrane Filtration The filtrate comes out and residues remain in the filter It Includes:
Constructed Wetlands These Include:
Constructed Wetlands Gravel and humus Wetland plants Soil Micro organisms Soil surface Influent Waste water Treated Water Effluent Bed rocks
Waste water treatment plant View of a plant from above
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