Research Of The Removal Of Phaeocystis Globosa And Prorocentrum Dentatum Red Tide By BCDMH And DBDMH

Phaeocytstis globosa and Prorocentrum dentatum is the familiar red tide species of South-China and East-China respectively. The research in removal method of red tide in the hot spot of the red tide research domain.In this thesis, we investegate the life cycle of Phaeocytstis globosa strain ZHUHAI, and we found that, the little cells colonies can attach to each other by the amylose excreted by the cells and become one big colony. This kind of colony has the unique characteristic that the cells on the crust of the colony distribute in blocks.Base on the information which come from the cultivation and investigation of Phaeocytstis globosa and Prorocentrum dentatum we select the appropriately phase of the algae to carry on the algae-removed experiment. We use the BCDMH and DBDMH as the algaecide and found that both of them effective. The BCDMH have the algae removal rate of 90% with the concentration of 38mg/L against the Phaeocytstis globosa(the algae cells density is 3.29 106Cell/ml ). The BCDMH and DBDMH have the algae removal rate of 90%with the concentration of 20mg/L and 25mg/L respectively against the Prorocentrum dentatum(the cell density scale is 2.80 106Cell/ml ). Furthermore, we discuss the removal mechanic of both the BCDMH and DBDMH.To test the actual effect of the algaecide of BCDMH and DBDMH, we collect the Phaeocytstis globosa red tide colonies along with the sea water and carry on the simulation experiment. It show that both the BCDMH and DBDMH can remove the colonies efficiently and have few negative effect on non-red tide microbe. So the BCDMH and DBDMH are worth of further investigation and wide application.