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亜臨界水熱処理による
亜臨界水熱処理による
高含水率有機系水産廃棄物からの
高含水率有機系水産廃棄物からの
肥料抽出に関する研究
水産系廃棄物:漁業活動に伴って発生する魚の残渣

 特徴
 ・栄養成分が多く 特定産業に集中的に発生す
  栄養成分が多く、特定産業に集中的に発生す
  るため、質が安定している
 ・水分を多く含むため腐りやすく処理が難しい
     多 含   腐      が
 ・未利用バイオマスとして利用することができる

 そ 中  資源 有効利用
→その中でも資源の有効利用が進んでいない
 水産系廃棄物がホタテウロ
中陽腺(ウロ)
          貝柱    ・栄養成分が多く含ま
                 れている
                ・Cd等の重金属が蓄積
                ・年間約4万トン発生
                ・現在は焼却・埋立・堆
                 肥化が行われている
生殖巣       エラ
      外套膜(ヒモ)
   未利用     を有効 利用す
  →未利用バイオマスを有効に利用するための
   資源化方法として亜臨界水熱処理を行う
水熱処理とは?
高温 高圧の水で成分を溶かしだす処理
高温・高圧の水で成分を溶かしだす処理




ホタテウロ


   養
・ 栄養成分と重金属を分けて集められる
・ 水分調節がいらない
・ 反応時間が短い
・ 臭くない
途中、省略
途中 省略
まとめ
• 水熱処理によ て重金属を固体内に残し 肥料成
  水熱処理によって重金属を固体内に残し、肥料成
  分を液体中に抽出することができた
• 亜臨界水熱処理 肥料成分が多く抽出 きる条件
  亜臨界水熱処理で肥料成分が多く抽出できる条件
  は温度200℃(圧力1.35MPa)、滞留時間20分、L/S
  =10である
     である

 液肥を山林緑化に利用す
     資源循環利用
 ることで資源循環利用が
 期待できる

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