Annually, olive milling results in about 12 million m3 olive mill wastewater (OMWW). The high concentration of natural phenolics originating from the olive fruit hinders the fermentative metabolism of OMWW in water treatment plants or biogas plants. However, those phenolic substances showing a variety of biological activities are possible value-added products. To date, no technique at an industrial scale for any selective extraction of phenolics from OMWW is known. In this work, it was shown that polar phenolics can be extracted via foam fractionation. Optimal experimental parameters like pH-value or concentration were determined via design of experiment. From the complex matrix OMWW polymeric substances particularly were enriched. Moreover, several derivatives of hydroxytyrosol, the phenolic main component of OMWW were synthesized. In vitro they showed no differentiation-inducing effect on neural stem cells.
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Annually, olive milling results in about 12 million m3 olive mill wastewater (OMWW). The high concentration of natural phenolics originating from the olive fruit hinders the fermentative metabolism of OMWW in water treatment plants or biogas plants. However, those phenolic substances showing a variety of biological activities are possible value-added products. To date, no technique at an industrial scale for any selective extraction of phenolics from OMWW is known. In this work, it was shown tha...
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