engineering recuitment NHPC JE & THDC JE 2023 Mock Test Environmental Engineering Disposing of Sewage Effluents
A sample of mixed liquor was found to have suspended solids (SS) = 4500 mg/L and after setting for 30 minutes in a 1 L cylinder, it occupied 300 mL. The Sludge Volume Index (SVI) is
1
150
2
67
3
75
4
1500