濃縮海洋深層水の膜蒸留法による高塩分化と微細藻Dunaliella salinaの培養への応用(Production of Highly Concentrated Deep Seawater by Membrane Distillation and its Application for Microalga Dunaliella salina Cultivation)
- 標題
- 濃縮海洋深層水の膜蒸留法による高塩分化と微細藻Dunaliella salinaの培養への応用(Production of Highly Concentrated Deep Seawater by Membrane Distillation and its Application for Microalga Dunaliella salina Cultivation)
- 作者
- 島村 智子, 黒田 さやか, 竹中 裕行, 柳下 宏, 池上 徹, 榊 啓二, 受田 浩之(Tomoko Shimamura, Sayaka Kuroda, Hiroyuki Takenaka, Hiroshi Yanagishita, Toru Ikegami, Keiji Sakaki, Hiroyuki Ukeda)
- 文件屬性
- 日本研究
- 知識分類
- 水產養殖
- 出版年
- 2008
- 刊名
- 日本食品科学工学会誌
- 卷
- 55
- 期
- 12
- 頁
- P 619-624
- 點閱數
- 2706
摘要
海洋深層水産業において活用方法が模索されていた濃縮海洋深層水の膜蒸留法による濃縮高塩分化を提案した．本膜蒸留装置では，疎水性多孔質PTFE膜を利用することにより，塩分濃度5.2％の濃縮海洋深層水から塩分濃度12.3％の濃縮高塩分化海洋深層水を製造することができた．また，膜蒸留装置の冷却源に海洋深層水を，温源に太陽光を利用することで，0.4t/day/m2のfluxで濃縮高塩分化海洋深層水を製造できる可能性を示した．さらに，本膜蒸留装置により製造した濃縮高塩分化海洋深層水に窒素とリンのみを添加することで，機能性食品素材として注目されている微細藻D. salinaの培養が可能であることを明らかとした．本研究の成果は，これまで廃棄されてきた濃縮海洋深層水を資源として利活用する道を示すものであり，今後の産業化に向けた取り組みが大いに期待される
In Japan, deep seawater has been a valuable resource for food industries ; in particular, deionized deep seawater is widely used for bottled mineral water. However, concentrated deep seawater, a byproduct of the deionization process, has no current applications. In this study, we produced highly concentrated deep seawater using a novel membrane distillation system and cultivated the well-known halotolerant microalga Dunaliella salina, which is a rich source for β-carotene, using the distillation products. The proposed membrane distillation system consisted of two glass compartments (feed and permeate sides) and a polytetrafluoroethylene (PTFE) membrane. NaCl concentration from 5.2 to 12.3% was effectively achieved by maintaining the feed side at 36°C and the permeate side at 15°C ; the water flux through the PTFE membrane was 0.4 t/day/m2. The highly concentrated deep seawater produced from the distillation system was used to cultivate D. salina by adding only nitrogen and phosphate sources. These results suggest that this membrane distillation system is useful in manufacturing highly concentrated deep seawater that can be used as a medium for D. salina cultivation.
In Japan, deep seawater has been a valuable resource for food industries ; in particular, deionized deep seawater is widely used for bottled mineral water. However, concentrated deep seawater, a byproduct of the deionization process, has no current applications. In this study, we produced highly concentrated deep seawater using a novel membrane distillation system and cultivated the well-known halotolerant microalga Dunaliella salina, which is a rich source for β-carotene, using the distillation products. The proposed membrane distillation system consisted of two glass compartments (feed and permeate sides) and a polytetrafluoroethylene (PTFE) membrane. NaCl concentration from 5.2 to 12.3% was effectively achieved by maintaining the feed side at 36°C and the permeate side at 15°C ; the water flux through the PTFE membrane was 0.4 t/day/m2. The highly concentrated deep seawater produced from the distillation system was used to cultivate D. salina by adding only nitrogen and phosphate sources. These results suggest that this membrane distillation system is useful in manufacturing highly concentrated deep seawater that can be used as a medium for D. salina cultivation.