Installing the Sludge Monitor

Before designing the sludge monitoring installation, environmental engineers must answer two questions:

1. Is the information in the liquid or solid phase of the sludge?

2. Should the measurement be made online (in-place) or should a sample be delivered to the analyzer?

The answers to these questions will direct the environmental engineer to the correct installation.

FIG. 7.9.8 Automatically cleaned, 90° scatterer light-detecting turbidity transmitter. (Courtesy of BTG Inc.)

Light Source £ ^ Light Monitor

Detector Cell ^^


Light Beam

Suspended Solids

Suspended Solids

FIG. 7.9.9 In-line, backscatter-type turbidity analyzer. (Courtesy of Gam-Rad Inc.)

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