High-Cell-Density Cultivation and Algicidal Activity Assays of a Novel Algicidal Bacterium to Control Algal Bloom Caused by Water Eutrophication

Liao, Chunli; Liu, Xiaobo

High-Cell-Density Cultivation and Algicidal Activity Assays of a Novel Algicidal Bacterium to Control Algal Bloom Caused by Water Eutrophication

2014

Liao, Chunli | Liu, Xiaobo

To biocontrol algal bloom, a novel algicidal bacterium, Enterobacter sp. NP23, was isolated. This strain has an effective algicidal activity against Chlorella vulgari, Microcystis aeruginosa, Scenedesmus, and Chlorella pyrenoidosa. Meanwhile, the growth factors were assayed to obtain a high cell density of strain NP23. As a result, three growth factors (i.e., KNO₃0.6 %, MnSO₄·H₂O 0.001 %, and K₂HPO₄0.3 %) were determined as the critical roles in enhancing the cell density of 10¹³ CFU/mL. Moreover, algicidal activity assays revealed that strain NP23 exhibited high algicidal activities against M. aeruginosa and Scenedesmus. These results indicate that this wild-type strain would provide a new member for biocontrolling microalgal and cyanobacterial populations in eco-technology.

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