Strength of Sewage can be assessed by All EXCEPT
Sewage - Contains 99.9% water Strength is assessed by 1. BOD (Biological O2 Demand) - Best method O2 absorbed by sewage at 200 C 2. COD (Chemical O2 demand) 3. Suspended solids
Biological oxygen demand (BOD)
Chemical oxygen demand (COD)
Suspended solids
Coliform count
Air, Light, Sound, Housing, Radiation, Waste Disposal