Agalias Apostolis, Magiatis Prokopios, Skaltsounis Alexios-Leandros, Mikros Emmanuel, Tsarbopoulos Anthony, Gikas Evagelos, Spanos Ioannis, Manios Thrasyvoulos
Laboratories of Pharmacognosy and Pharmaceutical Chemistry, School of Pharmacy, University of Athens, Panepistimiopolis Zografou, 157 71 Athens, Greece.
J Agric Food Chem. 2007 Apr 4;55(7):2671-6. doi: 10.1021/jf063091d. Epub 2007 Mar 10.
The high polyphenol content of the wastewater is the major environmental problem caused by the olive mills. A pilot scale system for the treatment of the olive oil mills wastewater was developed aiming at the recovery of high added value-contained polyphenols and the reduction of the environmental problems. The treatment system consists of three main successive sections: The first one includes successive filtration stages aiming at the gradual reduction of the wastewater suspended solids up to a limit of 25 microm. The second section includes passing of the filtered wastewater through a series of adsorbent resins (XAD16 and XAD7HP) in order to achieve the de-odoring and decolorization of the wastewater and the removal/ recovery of the polyphenol and lactone content. The third section of the procedure includes the thermal evaporation and recovery of the organic solvents mixture, which has been used in the resin regeneration process, and finally the separation of the polyphenols and other organic substance contents using fast centrifuge partition chromatography. The final outcome of the whole procedure is (i) an odorless yellowish wastewater with a 99.99% reduced content in polyphenols and 98% reduced COD, (ii) an extract rich in polyphenols and lactones with high antioxidant activity and high added value, (iii) an extract containing the coloring substances of the olive fruit, and (iv) pure hydroxytyrosol.
橄榄油加工厂废水的高多酚含量是其造成的主要环境问题。开发了一种中试规模的橄榄油加工厂废水处理系统，旨在回收含有高附加值的多酚并减少环境问题。该处理系统由三个主要连续部分组成：第一部分包括连续过滤阶段，目的是将废水悬浮固体逐步减少至25微米的限度。第二部分包括使过滤后的废水通过一系列吸附树脂（XAD16和XAD7HP），以实现废水的除臭和脱色以及去除/回收多酚和内酯成分。该程序的第三部分包括热蒸发和回收在树脂再生过程中使用的有机溶剂混合物，最后使用快速离心分配色谱法分离多酚和其他有机物成分。整个程序的最终结果是：（i）一种无味的淡黄色废水，多酚含量降低99.99%，化学需氧量降低98%；（ii）一种富含多酚和内酯的提取物，具有高抗氧化活性和高附加值；（iii）一种含有橄榄果色素物质的提取物；（iv）纯羟基酪醇。
