2022 Fiscal Year Final Research Report

Establishment of biological water treatment technology by activated anaerobic sulfur oxidation and electron transfer

Research Project

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Project/Area Number	20H00641
Research Category	Grant-in-Aid for Scientific Research (A)
Allocation Type	Single-year Grants
Section	一般
Review Section	Medium-sized Section 64:Environmental conservation measure and related fields
Research Institution	Nagaoka University of Technology
Principal Investigator	Yamaguchi Takashi 長岡技術科学大学, 工学研究科, 教授 (10280447)
Co-Investigator(Kenkyū-buntansha)	幡本将史長岡技術科学大学, 工学研究科, 准教授 (20524185) 押木守北海道大学, 工学研究院, 准教授 (90540865) 渡利高大長岡技術科学大学, 工学研究科, 助教 (90800540)
Project Period (FY)	2020-04-01 – 2023-03-31
Keywords	嫌気性処理 / 硫黄動態 / 微生物処理
Outline of Final Research Achievements	The purpose of this study is to establish a next-generation water recycling system applicable to low-temperature sewage by using anaerobic sulfur oxidation and the electron-transfer promoting microbial immobilization technology. As a result of this research, we have achieved significant progress in elucidating the reaction mechanisms involved in electron transfer related to "anaerobic sulfur oxidation," which is an unknown phenomenon, and in collecting knowledge on the control of anaerobic sulfur oxidation/reduction under low-temperature conditions. In the future, we will conduct demonstration scale experiment for social implementation based on the knowledge obtained so far.
Free Research Field	環境衛生工学
Academic Significance and Societal Importance of the Research Achievements	本研究では、申請者オリジナルの技術である未解明反応「嫌気的硫黄酸化」反応について、その反応メカニズムの解明と低温条件下での嫌気的硫黄酸化還元の制御に関する知見を得られた。これら、地球全体の窒素動態を把握するにも大きく貢献すると考えられその学術的意義や社会的意義は大きい。さらに、これらの知見を廃水処理技術として展開することで、低温でも運転可能な水処理装置の開発が可能になり、開発途上国などへの応用も可能になる。