Algae Investigation In Source Water And The Cyanophytae Biological Characteristics Research

Xidayang reservoir was the source water of Baoding city inhabitant drinking water. In 2004 the species and amount of it had been studied for one year, in the base of it, this paper continued studying the existence of algae in the source water, and the data of two years were compared .The result showed that the species in the source water of Baoding were steady . Bacillariophyta and Chlorophyta were master algae in whole year. From July to September the species and amount of Cyanophyta would have a wave. The algae number in 2005 was fewer than that of 2004, but it was worth further governing still. In the same time the source water of Shijiazhuang city inhabitant drinking water was studied firstly.In the base of research, the algae in the source water of Baoding were separated and identified. 8 species of Cyanophyta were separated. They were Merismopedia glauca,Oscillatoria formosa,Spirulina maior,Oscillatoria sancta,Oscillatoria amphibia,Phormidiumfaveolarum and two determined algae.Oscillatoria was the species easy to form bloom, Spirulina and Nostoc which separated before both had large economic potential. This paper chose them to studied their biologic characteristics. The result showed that Cyanophyta was adapted to living in the neutral environment, lacking phosphorus could restrain its growth, in this experiment fitting illumination(1500Lux, 24h continuous illumination) accelerated the growth of Cyanophyta. This paper also validated the Nostoc of the experiment had nitrogen fixation.This paper attempted to find biological method to restrain the growth of algae. Allelopathy of bacteria-algae,fungus-algae algae-algae were firstly studied. The result showed that the 12 species of bacteria in the experiment had no obvious effect. Aspergillus niger and Mucor rouxianus of 4 species of fungi in the experiment restrained algae in some degree. The four algae were chose to make mix cultivating and individual cultivating showed that they were inhabiting each other. The superiority in order were Scenedesmus > Oscillatoria > Spirulina > Nostoc, the front inhabited the behind.