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AWWA QTC97125
- Particle Counting in Real-World Water Treatment Plant Operations
- Conference Proceeding by American Water Works Association, 01/01/1997
- Publisher: AWWA
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In 1996, the Cobb County-Marietta Water Authority installed 40 on-line particle counter sensors at its three surface water treatment plants. Particle counters were installed on each individual filter effluent as well as on the raw, settled and combined filtered process flow streams. This paper reviews the data being generated by these instruments and presents selected findings from the data that demonstrate ways in which particle count data can be used in real world plant operations. The particle counters have been useful in identifying both process and equipment problems. Actual data are presented that show filter breakthrough of particles hours before the turbidity changes. Data are also presented that show how coagulation problems in the plant can cause filtered turbidity to change in a more dramatic way than particle counts. This data, taken together, demonstrates how particle count data can be added to turbidimeter data to give a complete picture of the performance of an individual filter as changes occur in other process parameters, such as plant flow rate, coagulation effectiveness and backwash of other filters.
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