start-ver=1.4
cd-journal=joma
no-vol=
cd-vols=
no-issue=
article-no=
start-page=
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2025
dt-pub=20250801
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=From sewage sludge to agriculture: governmental initiatives, technologies, and sustainable practices in Japan
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Sewage sludge (SS), an underutilized but valuable resource for agriculture, contains essential nutrients, such as phosphorus. In Japan, where dependence on imported fertilizers is high and global price fluctuations persist, using SS as fertilizer presents a sustainable alternative aligned with circular economy goals. This review analyzes Japan’s current efforts to repurpose SS, focusing on technological developments and key policy initiatives that promote safe and effective application. Selective phosphorus recovery technologies mitigate resource depletion, while holistic approaches, such as composting and carbonization, maximize sludge utilization for agricultural applications. Government-led initiatives, including public awareness campaigns, quality assurance standards and research support, have facilitated the adoption of sludge-based fertilizers. To contextualize Japan’s position, international trends, particularly in the EU, are also examined. These comparisons reveal both common strategies and areas for policy and technological advancement, especially regarding regulation of emerging contaminants. By integrating national case studies with global perspectives, the study offers insights into the economic, environmental, and social benefits of SS reuse, contributing to Japan’s goals of resource self-sufficiency and carbon neutrality, while also informing broader sustainable agriculture transitions worldwide.
en-copyright=
kn-copyright=

en-aut-name=NguyenThu Huong
en-aut-sei=Nguyen
en-aut-mei=Thu Huong
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=FujiwaraTaku
en-aut-sei=Fujiwara
en-aut-mei=Taku
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=YamashitaHiromasa
en-aut-sei=Yamashita
en-aut-mei=Hiromasa
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TogawaHironori
en-aut-sei=Togawa
en-aut-mei=Hironori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=MiyakeHaruo
en-aut-sei=Miyake
en-aut-mei=Haruo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=GotoMasako
en-aut-sei=Goto
en-aut-mei=Masako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=NagareHideaki
en-aut-sei=Nagare
en-aut-mei=Hideaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=NakamuraMasato
en-aut-sei=Nakamura
en-aut-mei=Masato
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=OritateFumiko
en-aut-sei=Oritate
en-aut-mei=Fumiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

en-aut-name=IharaHirotaka
en-aut-sei=Ihara
en-aut-mei=Hirotaka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=

en-aut-name=MaedaMorihiro
en-aut-sei=Maeda
en-aut-mei=Morihiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=

affil-num=1
en-affil=Graduate School of Engineering, Kyoto University
kn-affil=

affil-num=2
en-affil=Graduate School of Engineering, Kyoto University
kn-affil=

affil-num=3
en-affil=Water Supply and Sewerage Department, National Institute for Land and Infrastructure Management
kn-affil=

affil-num=4
en-affil=Water Supply and Sewerage Department, National Institute for Land and Infrastructure Management
kn-affil=

affil-num=5
en-affil=R & D Department, Japan Sewage Works Agency
kn-affil=

affil-num=6
en-affil=1St Research Department, Japan Institute of Wastewater Engineering and Technology
kn-affil=

affil-num=7
en-affil=Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=

affil-num=8
en-affil=Institute for Rural Engineering, NARO
kn-affil=

affil-num=9
en-affil=Institute for Rural Engineering, NARO
kn-affil=

affil-num=10
en-affil=Institute for Agro-Environmental Sciences, NARO
kn-affil=

affil-num=11
en-affil=Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=
en-keyword=Japan
kn-keyword=Japan
en-keyword=Sewage sludge
kn-keyword=Sewage sludge
en-keyword=Agriculture
kn-keyword=Agriculture
en-keyword=Sludge fertilizers
kn-keyword=Sludge fertilizers
en-keyword=Governmental initiatives
kn-keyword=Governmental initiatives
END

start-ver=1.4
cd-journal=joma
no-vol=23
cd-vols=
no-issue=2
article-no=
start-page=71
end-page=81
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2025
dt-pub=2025
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Study on the Removal Technology of Trichloramine from Drinking Water Using Ultraviolet Light
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Trichloramine (NCl3) is an inorganic chloramine that causes a pungent chlorine-like odor, and it is difficult to remove its precursors (nitrogen organic compounds and/or ammonia) completely from water. Powdered activated carbon, ozonation, and UV treatment have been applied for decomposing NCl3, but free chlorine was also decomposed. So, it is necessary to develop a technique that can selectively control NCl3 without losing free chlorine. UV light-emitting diodes (265, 280, and 300?nm) and plasma emission UV sheet (347 ± 52?nm, hereafter 350?nm) were compared to find the optimal wavelengths that decompose NCl3 but not free chlorine. As a result, 90.6, 96.7, 92.5, and 77.8% of NCl3 were removed at 265, 280, 300 (3,600?mJ/cm2), and 350?nm (14,400?mJ/cm2), respectively. On the other hand, free chlorine at neutral pH (hypochlorous acid is dominant) and slightly alkaline pH (hypochlorite ion is dominant) was not decomposed at 350?nm, but at other wavelengths (i.e., 265, 280, and 300?nm) the removals were more than 64%. Therefore, UV radiation at 350?nm can be candidates to remove NCl3 while maintaining free chlorine. However, this method requires high input energy, and further study is needed for evaluating the practical applicability of this method by considering optimal reactor design.
en-copyright=
kn-copyright=

en-aut-name=HashiguchiAyumi
en-aut-sei=Hashiguchi
en-aut-mei=Ayumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=YoshidaShiho
en-aut-sei=Yoshida
en-aut-mei=Shiho
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=EchigoShinya
en-aut-sei=Echigo
en-aut-mei=Shinya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TakanamiRyohei
en-aut-sei=Takanami
en-aut-mei=Ryohei
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=NagareHideaki
en-aut-sei=Nagare
en-aut-mei=Hideaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

affil-num=1
en-affil=Faculty of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Graduate School of Natural Science and Technology, Shimane University
kn-affil=

affil-num=3
en-affil=Graduate School of Global Environmental Studies, Kyoto University
kn-affil=

affil-num=4
en-affil=Faculty of Design Technology, Osaka Sangyo University
kn-affil=

affil-num=5
en-affil=Faculty of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=
en-keyword=trichloramine
kn-keyword=trichloramine
en-keyword=disinfection byproducts
kn-keyword=disinfection byproducts
en-keyword=drinking water
kn-keyword=drinking water
en-keyword=ultraviolet light
kn-keyword=ultraviolet light
END

start-ver=1.4
cd-journal=joma
no-vol=39
cd-vols=
no-issue=
article-no=
start-page=35
end-page=35
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2017
dt-pub=201711
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=編集後記
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=NagareHideaki
en-aut-sei=Nagare
en-aut-mei=Hideaki
kn-aut-name=永禮英明
kn-aut-sei=永禮
kn-aut-mei=英明
aut-affil-num=1
ORCID=

affil-num=1
en-affil=Environmental Management Center, Okayama University
kn-affil=岡山大学環境管理センター
END

start-ver=1.4
cd-journal=joma
no-vol=39
cd-vols=
no-issue=
article-no=
start-page=2
end-page=8
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2017
dt-pub=201711
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=平成29年度環境管理センター公開講演会「予想される巨大地震に備えた耐災のまちづくり」
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=NagareHideaki
en-aut-sei=Nagare
en-aut-mei=Hideaki
kn-aut-name=永禮英明
kn-aut-sei=永禮
kn-aut-mei=英明
aut-affil-num=1
ORCID=

affil-num=1
en-affil=Environmental Management Center, Okayama University
kn-affil=岡山大学環境管理センター
END

start-ver=1.4
cd-journal=joma
no-vol=38
cd-vols=
no-issue=
article-no=
start-page=40
end-page=40
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2016
dt-pub=201611
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=編集後記
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=NagareHideaki
en-aut-sei=Nagare
en-aut-mei=Hideaki
kn-aut-name=永禮英明
kn-aut-sei=永禮
kn-aut-mei=英明
aut-affil-num=1
ORCID=

affil-num=1
en-affil=Environmental Management Center, Okayama University
kn-affil=岡山大学環境管理センター
END

start-ver=1.4
cd-journal=joma
no-vol=38
cd-vols=
no-issue=
article-no=
start-page=2
end-page=11
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2016
dt-pub=201611
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=平成28年度環境管理センター公開講演会 「資源循環からみた未来社会の構図」
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=
en-copyright=
kn-copyright=

en-aut-name=NagareHideaki
en-aut-sei=Nagare
en-aut-mei=Hideaki
kn-aut-name=永禮英明
kn-aut-sei=永禮
kn-aut-mei=英明
aut-affil-num=1
ORCID=

affil-num=1
en-affil=Environmental Management Center, Okayama University
kn-affil=岡山大学環境管理センター
END