1.

Sludge volume index is defined as the ratio of:

A. Percentage of sludge by volume to the percentage of total solids by weight
B. Percentage of sludge by volume to the percentage of suspended solids by weight
C. Percentage of suspended solids by weight to the percentage of sludge by volume
D. Percentage of total solids by weight to the percentage of sludge by volume
Answer» C. Percentage of suspended solids by weight to the percentage of sludge by volume


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