title: A method of water-bloom prevention using underwater pulsed streamer discharge.
abstract: Water-bloom (also named as cyanobacterial bloom) is becoming a very serious pollution problem all over the world. In this paper, a new method for the prevention of water blooms using underwater streamer discharges is reported. Blumlein pulse forming network (B-PFN) and magnetic pulse compression circuit (MPC) were employed to apply high voltage pulses to water with cyanobacterial cells. The experimental results confirmed that the cyanobacterial cells sank to the bottom of the water bodies after applying underwater streamer discharges. Transmission electron microscope (TEM) observations showed that the discharge collapsed the gas vesicles (GVs)-the intercellular structure of water-bloom forming cyanobaterial cells-and did not affect the other part of contents of the cells. Cynabacterial cells lost buoyancy and sank to the bottom of the water bodies. Because of lower temperature and without enough sunlight at the bottom of the water bodies, the cells can be prevented from proliferation too quickly.
authors.affiliation: School of Engineering, Toyo University, Kawagoe, Saitama, Japan. lizi-72@hotmail.co.jp
authors.forename: Zi
authors.initials: Z
authors.lastname: Li
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ohno
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sato
authors.forename: Takashi
authors.initials: T
authors.lastname: Sakugawa
authors.forename: Hidenori
authors.initials: H
authors.lastname: Akiyama
authors.forename: Shinta
authors.initials: S
authors.lastname: Kunitomo
authors.forename: Kenichi
authors.initials: K
authors.lastname: Sasaki
authors.forename: Masao
authors.initials: M
authors.lastname: Ayukawa
authors.forename: Hisamichi
authors.initials: H
authors.lastname: Fujiwara
mesh_terms: D000458:Cyanobacteria / Q000254:growth & development* / Q000648:ultrastructure; D004574:Electromagnetic Fields; D046529:Microscopy, Electron, Transmission; D014871:Water Microbiology; D014876:Water Pollution / Q000517:prevention & control*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*