Journal
WATER SCIENCE AND TECHNOLOGY
Volume 57, Issue 10, Pages 1587-1593Publisher
I W A PUBLISHING
DOI: 10.2166/wst.2008.144
Keywords
calibration; noise; on-line monitoring; rain event; UV/VIS spectroscopy
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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.
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