Sensors for nitrogen removal monitoring in wastewater treatment
Krist V. Gernaey, Herwig Bogaert, Peter A. Vanrolleghem, Lieven Van Vooren, Willy Verstraete · 1998
An overview of sensors and techniques for monitoring of nitrogen removal processes is presented. Some recent evolutions in this area are discussed in detail. The overview is not limited to a description of sensors for the on-line collection of ammonium, nitrate and nitrite concentration data but also covers sensors and techniques that can be used to measure nitrification and denitrification activities of activated sludge. Sensors were subdivided into three categories: direct probes (DO, pH, ORP), indirect probes (e.g. on-line NH 4 + and NO 3 - analyzers) and biosensors (e.g. RODTOX, NITROX, DECADOS, BRAM, ...). Finally, the application of activity measurements for influent nitrification toxicity monitoring is discussed, both in technical and cost/benefit terms. 1. Introduction Biological nitrogen removal is nowadays one of the most important and most intensively studied wastewater treatment processes. The growing attention for biological nitrogen removal was favored by the more stri...