2024 Volume 80 Issue 25 Article ID: 24-25012
In this study, we attempted to cultivate Artemia for a long period of time utilizing microalgae that naturally proliferate from municipal wastewater treated water with the activated sludge method. As a result of two weeks of culture under natural conditions using only treated municipal wastewater as a substrate, green algae with Scenedesmus quadricauda as the dominant species proliferated. In the component analysis of algal biomass, ash (36%) was detected in the highest proportion, and the proportions of protein and lipid were lower than that of Chlorella. Microalgae derived from urban wastewater treatment plant contained a greater variety of fatty acids, and the proportion of unsaturated fatty acids was higher than that of Chlorella. In a feeding experiment of Artemia, under conditions in which microalgae derived from treated municipal wastewater were fed, initial growth was slower than that of the comparison Chlorella, but it survived for over 70 days and grew to adults. The birth of nauplii was also confirmed, indicating that microalgae derived from treated wastewater are effective as food for the long-term rearing of Artemia.
