A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min. The settled sludge occupies 300 ml at the bottom. This sludge, when dried, is found to have a mass of 3.2 g. The Sludge Density Index is mg/ml (round off to two decimal places).

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min.
The settled sludge occupies 300 ml at the bottom. This sludge, when dried, is found to
have a mass of 3.2 g. The Sludge Density Index is
mg/ml (round off to two
decimal places).
Transcribed Image Text:A sample of 1 litre is drawn from the aeration tank and is then allowed to settle for 30 min. The settled sludge occupies 300 ml at the bottom. This sludge, when dried, is found to have a mass of 3.2 g. The Sludge Density Index is mg/ml (round off to two decimal places).
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