Online Monitoring of Nitrogen Elimination in Vienna's Main Sewage Treatment Plant

摘要

Vienna's Main Sewage Treatment Plant was expanded in the years of 2004 and 2005, now designed for a population equivalent of 4.0 million and able to clean 680,000 m~3 of wastewater per day. In the tender, the operator of the plant had specified online spectrometry to be the method for monitoring of COD, Nitrate and TSS. s::can Messtechnik GmbH, Vienna, obtained the order for on-line instrumentation as a sub-supplier for Siemens AG Austria. In the beginning of 2005, 27 spectrometric probes of different types were purchased, most of them immediately installed and set into operation. The results of a test run for "verification of uniformity & accuracy" during a tough commissioning procedure proved high reliability, low operational costs and best precision of the installed s::can measuring instruments.