Sludge volume index is defined as the ratio of
A
Percentage of sludge by volume to percentage of suspended solids by weight
B
Percentage of sludge by volume to percentage of total solids by weight
C
Percentage of suspended solids by weight to percentage of sludge by volume
D
Percentage of total solids by weight to percentage of sludge by volume
Correct Answer: Percentage of sludge by volume to percentage of suspended solids by weight