Study on Float Characteristic and its Control of the Microcystis

Algae can cause much nuisance in lakes and reservoires due to bloomtorming and production of toxins and offflavours. There are air sacs in the body of Microcystis aeruginosa to float Microcystis aeruginosa up to the upper layer water in order to obtain plenteous light for its growth and reproduction...

Full description

Saved in:
Bibliographic Details
Published inEnergy procedia Vol. 11; pp. 4251 - 4259
Main Authors Cong, Hai-bing, Huang, Ting-lin, Chai, Bei-bei
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2011
Subjects
Air mixing
Down flow
Floating up velocity
Microcystis aeruginosa
Vertical distribution
Air mixing
Down flow
Microcystis aeruginosa
Floating up velocity
Vertical distribution
Online AccessGet full text

Cover

More Information
Summary:Algae can cause much nuisance in lakes and reservoires due to bloomtorming and production of toxins and offflavours. There are air sacs in the body of Microcystis aeruginosa to float Microcystis aeruginosa up to the upper layer water in order to obtain plenteous light for its growth and reproduction. The amount of Microcystis aeruginosa in the depth of 3 times water transparency is more than that in upside and under-side. The floating up velocity of Microcystis aeruginosa was measured under still water, the floating up velocity of 77% Microcystis aeruginosa is not more than 1 cm/min, and there are 10% Microcystis aeruginosa whose floating up velocity is between 1∼1.5 cm/min, 6% between 1.5∼2 cm/min, and 7% more than 2 cm/min. When the water flow gone downwards with the velocity of 1.65 cm/min, Microcystis aeruginosa's floating up will be prevented. An air mixing system has been applied in a water source of Tianjin Jieyuan water plant to control the algae growth. It was found that the content of phytoplankton chlorophyll-a was reduced by 13.96%
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2011.10.831