• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2020 Fiscal Year Final Research Report

Understanding of gene ontology of activated sludge

Research Project

  • PDF
Project/Area Number 19K22925
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 64:Environmental conservation measure and related fields
Research InstitutionKanazawa University

Principal Investigator

Honda Ryo  金沢大学, 地球社会基盤学系, 准教授 (40422456)

Co-Investigator(Kenkyū-buntansha) 松浦 哲久  金沢大学, 地球社会基盤学系, 助教 (90771585)
原 宏江  金沢大学, 地球社会基盤学系, 助教 (70823524)
Project Period (FY) 2019-06-28 – 2021-03-31
Keywords活性汚泥 / トランスクリプトーム / 難分解性物質
Outline of Final Research Achievements

Return sludge from a local wastewater treatment was employed to be acclimatized with step-wise increase of PFOS or PFOA dose. The sludge culture was replaced every day with synthetic wastewater containing PFOS or PFOA, whose concentration increased in every 5 days up to 20 μg/L under aerobic condition. After 20-days of acclimatization, sludge acclimatized with each of PFOS and PFOA were inoculated for batch biodegradation experiment. With PFOS-acclimated sludge (PFOS-AS), PFOS was decomposed approximately 20% after 14 days of incubation. On the contrary, PFOA was highly tolerant because no biodegradation was observed with PFOA- nor PFOS-acclimated sludges.

Free Research Field

環境微生物学

Academic Significance and Societal Importance of the Research Achievements

ペルフルオロアルキル化合物(PFAS)は微量でも強い毒性をもち,国内外で土壌や地下水・表流水にしばしば検出されて問題となっている。特に毒性と残存性の高いPFOSとPFOAは米国・日本国内でも水質環境基準設定され,汚染環境の浄化や水環境への拡散防止が急務である。しかし,PFASは非常に安定な化合物であり,通常の生物処理プロセスで分解除去することが困難である。本研究の成果は、本研究の成果は、PFASを含む廃棄物処分場や汚染土壌の浸出水・洗浄水の処理や,PFASを含む水道水源のRO膜による浄水処理後濃縮水のPFAS除去利用に適用でき,PFASによる水源汚染問題の解決につながる。

URL: 

Published: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi