The concentration time series measured in a sectional model of the
Metropolitan Wastewater Treatment Plant (WWTP) dechlorination basin was
coupled with field measurements to predict the benefits of mUltiple transverse
sampling points. The measured time series was used to generate
synthetic time series representing the composite samples from two, three
and four sampling points located in a cross section transverse to the flow.
The analysis of this data indicates how much the multiple sampling points
integrqte transverse gradients, decrease the necessary time to obtain a
"representative" sample and decrease the deviation of a 1 second grab
sample from a true mean value.
Johnson, Thomas R.; Stefan, Heinz G..
Multiple Point Effluent Sampling at the Metropolitan Wastewater Treatment Plant, St. Paul, Minnesota.
St. Anthony Falls Laboratory.
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