Study on the Control of Red Tide Dinoflagellate by Clay Combined Bacillus Ba3
This study explored the algal control technology of algicidal bacteria Ba3 combined with clay,based on the characteristics of algicidal bacterial and clay adsorption.The orthogonal test confirmed that the optimal combination was the sterile filtrate of Ba3 with the dosage of 1.0%and clay with the dosage of 100 mg·L-1.The algae dissolution rate of Karenia mikimotoi reached 94.0%within 24 h.The algae control effects of adding sterile filtrate,clay,clay+Ba3 sterile filtrate,clay+PAC,and clay+H2O2 alone were compared,respectively.The results showed that the combination of clay+PAC,clay+H2O2 appeared the phenomenon of algae density"rebound"after 12 hours,and the algae dissolution effect of the clay+Ba3 sterile filtrate after 48 h achieved more than 95%significantly higher algytic effect than the other combinations.The changes of chlorophyll a concentration before and after the test were detec-ted,which further verified the high-efficiency algae control effect of the combination of clay with Ba3 sterile filtrate,and it was expected to be applied and promoted in the control of dinoflagellate.
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