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Suppression of alkalization in rainwater regulating reservoir by shading on a pilot scale

Asakura, Hiroshi ; Matsuse, Umio and Nakagawa, Kei LU orcid (2021) In Water 13(18).
Abstract

As water in a rainwater regulating reservoir at the Sankyo landfill site in Nagasaki City tends to be alkalized and to exceed the pH upper limit of 7.5, measures to suppress the alkalization should be implemented. Inhibiting photosynthesis in algae is required to suppress the alkalization. Shading is one of the methods for inhibiting algal photosynthesis. In this study, we evaluated the pH reduction effect of shading on a pilot scale. pH decreased from 7.28 to 7.15 when 3% of the total area of the rainwater regulating reservoir was shaded. In addition, a clear decrease in pH was observed with more than 60% shading.

Please use this url to cite or link to this publication:
author
; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ahading, Algae, Alkalization, Landfill site, Regulating reservoir
in
Water
volume
13
issue
18
article number
2557
publisher
MDPI AG
external identifiers
  • scopus:85115660483
ISSN
2073-4441
DOI
10.3390/w13182557
language
English
LU publication?
no
additional info
Funding Information: Funding: This research was funded by Nagasaki City as a consignment study (20200603). The APC was funded by the Institute of Integrated Sciences and Technology, Nagasaki University. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
id
7641a137-a56b-463f-bfb5-f3c22a60cdab
date added to LUP
2021-10-23 14:37:01
date last changed
2023-08-30 03:44:53
@article{7641a137-a56b-463f-bfb5-f3c22a60cdab,
  abstract     = {{<p>As water in a rainwater regulating reservoir at the Sankyo landfill site in Nagasaki City tends to be alkalized and to exceed the pH upper limit of 7.5, measures to suppress the alkalization should be implemented. Inhibiting photosynthesis in algae is required to suppress the alkalization. Shading is one of the methods for inhibiting algal photosynthesis. In this study, we evaluated the pH reduction effect of shading on a pilot scale. pH decreased from 7.28 to 7.15 when 3% of the total area of the rainwater regulating reservoir was shaded. In addition, a clear decrease in pH was observed with more than 60% shading.</p>}},
  author       = {{Asakura, Hiroshi and Matsuse, Umio and Nakagawa, Kei}},
  issn         = {{2073-4441}},
  keywords     = {{Ahading; Algae; Alkalization; Landfill site; Regulating reservoir}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{18}},
  publisher    = {{MDPI AG}},
  series       = {{Water}},
  title        = {{Suppression of alkalization in rainwater regulating reservoir by shading on a pilot scale}},
  url          = {{http://dx.doi.org/10.3390/w13182557}},
  doi          = {{10.3390/w13182557}},
  volume       = {{13}},
  year         = {{2021}},
}