Dokuz Eylul University, Turkey
Delia T. SPONZA is professor since 2001 in Environmental Engineering Department at Dokuz Eylul University – IZMIR TURKEY. She is member of Turkish Science Academy since 2013. She is studying with anaerobic, aerobic, advanced treatment processes of industrial wastewaters. She has more than 15 studies relevant to toxicities of industrial wastewater. M.Sc. Gokce Guney has been graduated from Engineering Faculty of Dokuz Eylul University, Turkey as an Environmental Engineer. Then she started working at Environmental Engineering Department of Dokuz Eylul University, Turkey as a research assistant. Later on she obtained her post-graduation in M.Sc. from The Graduate School of Natural and Applied Sciences of Dokuz Eylul University, Turkey from Environmental Engineering Department. Now, she has continued her Ph.D. in Environmental Engineering Department and M.Sc. in Occupational Health and Safety Department both at The Graduate School of Natural and Applied Sciences of Dokuz Eylul University, Izmir, Turkey. M.Sc. Nefise Erdincmer has been graduated from Department of Biology of Hacettepe University. Then she started working at Environmental Measurements Laboratory of Dokuz Eylul University (DEU) as a biologist. Besides she obtained her post-graduation in M.Sc. from The Graduate School of Natural and Applied Sciences of DEU. Now she has continued her Ph.D in Marine Science and Technology Department in DEU.
Statement of the Problem: The olive mill sector needs to put into practice new strategies for wastewater management that will reduce the environmental impact of its excessive water consumption and high dye and auxiliary chemical expenditures The sector will be forced to develop an integrated waste management approach that involves the recycling of not only water but also consumable chemicals. Hydroxytyrosol is the main polyphenol naturally occurring in olive oil mill wastewater (OMW) either from two-phase or three-phase traditional and industrial mills. It is naturally occurring in virgin olive oil also in form of monoacetyl derivative which shows an antioxidant effect very close to the parent compound. Among the wide group of polyphenols, p-hydroxybenzoic acid and caffeic acid can be applied as natural antioxidant for cosmetic, food and pharmaceutical industries. In this study, the recoveries of the hydroxytyrosol, hydroxybenzoic acid and caffeic acid were performed using sequential anaerobic upflow anaerobic sludge blanket reactor (UASB) and reverse ozmosis (RO) processes. After UASB treatment the effluent was asidified, filtered and vaporised at 30 ⁰C at a pressure of 1.7 A in a autoclave. The obtained oil was extracted with ethyl acetate. The Hydroxytyrosol, p-hydroxybenzoic acid and caffeic acid were purified with kieselgel containing silica-gel and they were measured in a HPLC in a isocratic media using acetonitril/acettic acid/water mixture flow rate of 1.2 ml/min. The final sequential RO membrane stages were carried out in a bench-scale cross-flow unit. Flat-sheet thin-film composite (TFC) RO consisted of a polyamide active layer on a polysulfone ultra-filtration support, with an active area of 200 cm2 was used for reuse the treated water for process and land application since this treatment step maintaining the parametric values with regard to pH, EC, TSS, COD, total iron, ionic content and bacterial growth below the standard limits established for irrigation purposes.