Development of nature coagulant for carbon neutral water treatment

2018 Fiscal Year Final Research Report

• Project/Area Number: 16H05628
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Environmental conscious materials and recycle
• Research Institution: Ryukoku University
• Principal Investigator: Okuda Tetsuji 龍谷大学, 理工学部, 准教授 (60343290)
• Research Collaborator: ALI EMAN NOORI マレーシア・パハン大学 ; Mito Masatoshi The MitoMasa co. ltd
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 凝集剤 / 種子 / 浄水汚泥 / 水質 / 精製 / 抽出 / 肥料 / モリンガ

Outline of Final Research Achievements

Improvement in the recycling rate of sludge generated during water treatment is required, and its usage in agriculture field is most difficult and necessary application. We focused on flocculants derived from seeds of tropical plants, Moringa oleifera, (hereinafter “Moring oleifera coagulant” referred to as MOC), the influence of pretreatment and others purification trials onto the DOC increase and recyclability of its sludge produced coagulation and sedimentation using MOC when using MOC were evaluated by cultivation experiment. MOC optimized pretreatment and extraction shows coagulation performance without increase of residual DOC, and the sludge produced coagulation and sedimentation with the MOC had no bad effect to plants growth and high P contents, concluding “be recyclable as soil”.

Free Research Field

水処理工学、環境工学、農芸化学

Academic Significance and Societal Importance of the Research Achievements

モリンガ凝集剤の能力や機能の増加とコスト減を行なえ、実用化が検討できるレベルの前処理法、精製方法や条件を見いだせたと考える。これは最適な精製法によって得た凝集剤中の不純物の低減と凝集能の評価によるものであるが、ここでは汚泥のリサイクル性という付加価値についても検討し、熱帯植物Moring oleiferaが自生可能な熱帯地方では上水処理を完全に循環型化するのに必要な、モリンガ汚泥の肥料的な性質や実際の生育データを栽培試験より得る事ができた。これらにより凝集能力および肥料的な性能に関連する基礎的な情報を得ることができ、持続可能な循環型社会を達成する為の基礎を構築できた。