We describe a novel application for a microwave on-line sensor to measure the total solids (TS) load entering a municipal wastewater treatment plant (WWTP) from slaughterhouse sewage and some sanitary wastewaters. Measuring this kind of wastewater stream is very challenging, because it contains a high, but varying organic load with nitrogen, phosphorus and microorganisms. The reliability of the measured signal was studied by comparison with laboratory analyses and a correlation is presented of TS-value with other parameters that are typically followed in a wastewater treatment process. The results suggest that on-line microwave sensoring could be used to monitor total solids in wastewater influent. Our results show that the on-line microwave sensor and laboratory reference analyses give similar results with a good correlation between the two techniques. Furthermore, we demonstrate that the total solids values correlate well with conductivity, total nitrogen and BOD7 values but not with phosphorus, pH and temperature.
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Research Article| April 01 2009
On-line microwave total solids sensoring in sewage characterization
Water Sci Technol (2009) 59 (7): 1291–1297.
H. Poutiainen, S. Laitinen, P. Juntunen, H. Heinonen-Tanski; On-line microwave total solids sensoring in sewage characterization. Water Sci Technol 1 April 2009; 59 (7): 1291–1297. doi: https://doi.org/10.2166/wst.2009.095
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