Physical-Chemical Methods for the Control of Algal Species and Composition in Algal Culturing Facilities.

摘要

Three methods are described for the selective culture of Thalassiosira pseudonana, a desirable bivalve food,in the presence of a contaminant species Phaeodactylum tricornutum,an undesirable. The first method takes advantage of differences in cell wall strength between the two types of algae. The second method involves manipulation of nutrient levels in a mixed culture of Thalassiosira pseudonana and Phaeodactylum tricornutum to eliminate one or the other species from the culture. The third method utilizes a harvesting reseeding technique to maintain a relatively constant concentration of the slower-growing species in a semi-continuous mixed culture containing Carteria chuii and Thalassiosira pseudonana. The results are integrated into a two-loop algal culturing process.