This study estimated the ability of pressurization to collapse gas vesicles and thereby enhance the settleability of fresh water cyanobacteria. Settling velocities of Pseudanabaena galeata and Microcystis aeruginosa were measured at 11 different pressure values from 0 to 0.5 MPa. The morphological variations that occurred in the gas vacuoles according to the applied pressure were investigated using transmission electron microscopy images. The settleability of both cyanobacteria species increased statistically significantly (P = 0.000) with increasing pressure, whereas the gas-vacuolated area of both species decreased significantly (P = 0.000) with the magnitude of the applied pressure. The removal ability of cyanobacterial cells from the water layer increased with high pressure treatment. The maximum removal efficiency observed of P. galeata and M. aeruginosa cells relative to the control culture were 82% and 95%, respectively, at the maximum tested pressure value of 0.5 MPa.
Skip Nav Destination
Article navigation
Research Article|
May 05 2016
An alternative method to improve the settleability of gas-vacuolated cyanobacteria by collapsing gas vesicles Available to Purchase
Helayaye Damitha Lakmali Abeynayaka;
Helayaye Damitha Lakmali Abeynayaka
1Department of Environmental Science and Technology, Saitama University, Saitama, Japan
Search for other works by this author on:
Takashi Asaeda;
1Department of Environmental Science and Technology, Saitama University, Saitama, Japan
E-mail: [email protected]
Search for other works by this author on:
Kyoko Tanaka;
Kyoko Tanaka
2General Technical Support Center, Saitama University, Saitama, Japan
Search for other works by this author on:
Kimie Atsuzawa;
Kimie Atsuzawa
3Graduate School of Science and Engineering, Saitama University, Saitama, Japan
Search for other works by this author on:
Yasuko Kaneko;
Yasuko Kaneko
3Graduate School of Science and Engineering, Saitama University, Saitama, Japan
Search for other works by this author on:
Hidenori Nishda;
Hidenori Nishda
4Zeniya Ocean Engineering Service Co. Ltd, 2-7-12 Yaesu, Chuo, Tokyo, Japan
Search for other works by this author on:
Seiichi Inada
Seiichi Inada
4Zeniya Ocean Engineering Service Co. Ltd, 2-7-12 Yaesu, Chuo, Tokyo, Japan
Search for other works by this author on:
Water Supply (2016) 16 (6): 1552–1560.
Article history
Received:
December 16 2015
Accepted:
April 12 2016
Citation
Helayaye Damitha Lakmali Abeynayaka, Takashi Asaeda, Kyoko Tanaka, Kimie Atsuzawa, Yasuko Kaneko, Hidenori Nishda, Seiichi Inada; An alternative method to improve the settleability of gas-vacuolated cyanobacteria by collapsing gas vesicles. Water Supply 1 December 2016; 16 (6): 1552–1560. doi: https://doi.org/10.2166/ws.2016.068
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00