Study on the Optimal Activation Condition of Microbial Agents for Algaecide and the Analysis of the Mechanism
Activation conditions of microbial agents before being used for algaecide was discovered by orthogonal experiments and the algaecide mechanism was preliminary study. Results showed that urea was the most affective factor, followed by the sugar and dissolved oxygen with the minimal impact. When urea is 0.022 5 g/g IBC, sugar is 0.1 g/g IBC and the speed is 80 r/min(dissolved oxygen is 8.5 mg/L), it is with the maximum number of viable bacteria cells and best algaecide effect. To be the same algae removal effect, the dosage of IBC can be decreased by 600 g/t. The enhanced algaecide effect mainly due to the increased bacterial amount, and bacterial product or extracellular secretion of certain substances lead to the dissolve of microcystis aeruginosa.