抄録
Characteristics of algae and water quality were studied at a pond located in high latitudes. Domestic and industrial wastewaters discharged are treated through different type stabilization ponds made by enclosing a part of the pond to remove BOD5, CODcr and nutrients. Effects of the pond partition on the dominance species of algae and water quality were studied.
During the cold term (-20°C--5°C), Cryptomonas, Chlamydomonas and Euglena were dominance species in the pond. While Euglena, which may be grown by uptaking organic material was the dominance one in the stabilization pond, and its population increased in falling temperature. It plays an important role for removal of BOD5 and CODcr. On the other hand, during the warm term (15°C-30°C), dominance species were Cyclotella, Chlorella and Microcystis in the pond and Scenedesmus oblignus in facultative ponds of the stabilization ponds. Microcystis and Scenedesmus obliqnus would uptake NH4+-N truly. Removal of NH4+-N and PO43--P depends on the concentration of Chl.a. The relationship between NH4+-N and PO43--P removal and the concentrations of Chl.a was obtained.
