What was Aquasense's contribution to this MUDP project was to develop and implement a detection method / measurement of blue-green algae. Aquasense recommended that more than just a blue-green algae sensor be measured, based on the thesis that other parameters could provide reliable detection. As a result, they ended up measuring much more than initially assumed.
Two experiments were conducted. A control experiment in the laboratory at the Aarhus Technological Institute. In this way, it was possible to grow blue-green algae to determine the quality of the sensor under controlled conditions. During the test, the lux values were measured in the north-facing window, and the temperature in the water in which the algae were placed. In this way, it was possible to investigate how temperature and light affected growth. This application was connected to a Point Orange from Metasphere. This allowed data from the control experiment to be sent to the same data presentation system as the data measured in the lake, and thus had a frame of reference to see how the measurements developed.
Anders Legarth from Aquasense developed the buoy with instruments that would carry the entire measuring station out on the lake. They collected, with a multi-parameter probe AP-6000 from Aquaread, several data, such as temperature, pH, blue-green algae, turbidity, to investigate whether there were parameters that could be measured cheaper than a relatively expensive blue-green algae sensor for reliable detection. Unfortunately, it did not really turn out to be one. They placed the buoy Knudhule Sø in an undisturbed area, where it was known that the algae often developed. In addition to measuring out in the middle of the lake, a measuring station was also made inside by the bathing jetty. In this way, it was possible to see a development in the blue-green algae, and how they moved in the lake.
