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

Hiroshi Asakura; Umio Matsuse; Kei Nakagawa

doi:10.3390/w13182557

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

Hiroshi Asakura, Umio Matsuse, Kei Nakagawa

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	2557
Journal	Water
Volume	13
Issue number	18
DOIs	https://doi.org/10.3390/w13182557
Publication status	Published - 2021 Sept 1
Externally published	Yes

Bibliographical note

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.

Subject classification (UKÄ)

Water Engineering

Free keywords

Ahading
Algae
Alkalization
Landfill site
Regulating reservoir

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10.3390/w13182557

Cite this

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title = "Suppression of alkalization in rainwater regulating reservoir by shading on a pilot scale",

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.",

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TY - JOUR

T1 - Suppression of alkalization in rainwater regulating reservoir by shading on a pilot scale

AU - Asakura, Hiroshi

AU - Matsuse, Umio

AU - Nakagawa, Kei

N1 - 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.

PY - 2021/9/1

Y1 - 2021/9/1

N2 - 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.

AB - 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.

KW - Ahading

KW - Algae

KW - Alkalization

KW - Landfill site

KW - Regulating reservoir

U2 - 10.3390/w13182557

DO - 10.3390/w13182557

M3 - Article

AN - SCOPUS:85115660483

SN - 2073-4441

VL - 13

JO - Water

JF - Water

IS - 18

M1 - 2557

ER -

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

Abstract

Bibliographical note

Subject classification (UKÄ)

Free keywords

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