A submersible UV/VIS spectrophotometer has been implemented on the pre-treatment unit of a large-scale wastewater treatment plant (350,000 person-equivalent) to monitor the rapid changes in total Suspended Solids and total Chemical Oxygen Demand occurring during rain events as well as injections of reject water from the sludge treatment train or wasted activated sludge. Calibration has been proven to be difficult for fast composition-varying streams but the device is able to monitor qualitatively sudden quality changes, in spite of the noise affecting the signal.
Monitoring of rain events with a submersible UV/VIS spectrophotometer
Aurélien Maribas, Nadège Laurent, Philippe Battaglia, Maria do Carmo Lourenço da Silva, Marie- Noeëlle Pons, Bernard Loison; Monitoring of rain events with a submersible UV/VIS spectrophotometer. Water Sci Technol 1 May 2008; 57 (10): 1587–1593. doi: https://doi.org/10.2166/wst.2008.144
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