Movement characteristics of Cyanobacteria under stress of water-lifting aeration

In order to study the impact of algae control mixing technology on the distribution characteristics and movement of Cyanobacteria, the floating and subsiding velocity of Cyanobacteria in Taihu Lake was measured under different conditions such as different illuminance, temperature and pressure. The C...

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Bibliographic Details
Published inHuanjing kexue Vol. 35; no. 5; p. 1781
Main Authors Sun, Xiu-Xiu, Cong, Hai-Bing, Gao, Zheng-Juan, Cui, Chao-Jie, Cao, Qian-Qian
Format Journal Article
LanguageChinese
Published China 01.05.2014
Subjects
China
Cyanobacteria - cytology
Lakes - microbiology
Pressure
Temperature
Water Movements
China
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Summary:In order to study the impact of algae control mixing technology on the distribution characteristics and movement of Cyanobacteria, the floating and subsiding velocity of Cyanobacteria in Taihu Lake was measured under different conditions such as different illuminance, temperature and pressure. The Cyanobacteria showed strong propensity of floating under the illuminance from 1500 1x to 6000 1x. The Cyanobacteria particle with floating velocity of more than 0.8 cm.min-1 accounted for 58% under the illuminance of 1 500 1x. The floating velocity slowed down when the illuminance was lower than 1 500 1x or higher than 6 000 1x. In the temperature range of 8 to 25 Celsius degree, the Cyanobacteria floated and the floating velocity increased with temperature. The Cyanobacteria floated under the pressure of 0- 0. 1 MPa and the floating velocity slowed down as the pressure increased. Most Cyanobacteria were suspended in the water when the pressure reached 0. 2-0. 3 MPa and only a small part of the Cyanobacteria floated
ISSN:0250-3301
DOI:10.13227/j.hjkx.2014.05.020