Development of suppressive method of musty odor that reduce water treatment load

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K06331
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 41050:Environmental agriculture-related
• Research Institution: University of Tsukuba
• Principal Investigator: UTSUMI MOTOO 筑波大学, 生命環境系, 教授 (60323250)
• Co-Investigator(Kenkyū-buntansha): 清水 和哉 筑波大学, 生命環境系, 准教授 (10581613) ; 李 沁潼 東洋大学, 生命科学部, 助教 (80821727)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: カビ臭物質 / 放線菌 / 光環境 / 溶存酸素

Outline of Final Research Achievements

The removal of musty odor substances is a major expense in producing drinking water and causes economic loss of fishery products due to odor adsorption. This study was conducted to clarify the environmental factors under which actinomycetes, musty odor-producing microorganisms, produce musty odor substances and to develop musty odor control methods based on this knowledge. The results showed that the presence or absence of light did not affect the growth of actinomycetes. However, the wavelength and intensity of light affected their production of musty odor substances. In addition, it was found that the musty odorant was produced during the logarithmic growth phase under aerobic to microaerophilic conditions, and neither growth nor production of musty odorant under anaerobic conditions, indicating that the duration of anaerobic conditions affects the growth and production of musty odorant.

Free Research Field

水環境生態工学

Academic Significance and Societal Importance of the Research Achievements

水道水水産物にカビ臭があると、不快によるクレームや商品価値低下など社会的に大きな問題と損失が生じる。水中でのカビ臭物質産生微生物の有力種である放線菌のカビ臭産生や増殖と光環境、溶存酸素濃度環境が大きな影響を及ぼすことを示した今回の成果は、水源池など現場でのカビ臭発生対策に資する重要な知見を提供するものである。