| Effect of photoreactivation on ultraviolet inactivation of Microcystis aeruginosa. | |
| | |
MedLine Citation:
|
PMID: 21436560 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
Microcystis aeruginosa forms algal bloom in lakes. They produce toxic compounds such as microcystin. Against such algal problems, the effect of UV treatment was examined. In UV treatment, the effect of photoreactivation should be examined. Photoreactivation is a repair mechanism of genomic DNA damage by sunlight irradiation. UV treatment causes DNA damages on target cyanobacteria, however sunlight can repair some of these DNA damages. To examine the effect of photoreactivation, both white and yellow light incubations were employed. White light allows both photoreactivation and photosynthesis, while yellow light prohibits photoreactivation and only allows photosynthesis. Microcystis aeruginosa NIES 98 strain and PCC 7806 strain were used as the test cultures. Those cultures were exposed to low-pressure (LP) or medium-pressure (MP) ultraviolet (UV) lamp, then incubated under white or yellow light. Yellow light incubation method was effective to examine photoreactivation. It was revealed that almost six times UV fluence was required to inactivate 99% of Microcystis aeruginosa, under photoreactivation condition, compared with non-photoreactivation condition. Inhibition of photoreactivation could greatly enhance UV treatment efficiency against Microcystis aeruginosa. One of the practical suggestions is to conduct UV treatment at night, when photoreactivation by sunlight rarely takes place. Highly efficient inactivation was achieved by avoiding photoreactivation. |
| | |
Authors:
|
H Sakai; H Katayama; K Oguma; S Ohgaki |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Water science and technology : a journal of the International Association on Water Pollution Research Volume: 63 ISSN: 0273-1223 ISO Abbreviation: Water Sci. Technol. Publication Date: 2011 |
Date Detail:
|
Created Date: 2011-03-25 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9879497 Medline TA: Water Sci Technol Country: England |
Other Details:
|
Languages: eng Pagination: 1224-9 Citation Subset: IM |
Affiliation:
|
Department of Urban Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan E-mail: h_sakai@env.t.u-tokyo.ac.jp; katayama@env.t.u-tokyo.ac.jp; oguma@env.t.u-tokyo.ac.jp. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Experimental evaluation of intermittent aeration of a hollow fibre membrane bioreactor.
Next Document: Effect of soil fortified by polyurethane foam on septic tank effluent treatment.