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Performance Modeling and Cost Analysis of a Pilot-Scale Reverse Osmosis Process for the Final Purification of Olive Mill Wastewater
Department of Chemical Engineering, University of Granada, 18071 Granada, Spain
Department of Molecular Biology and Biochemical Engineering, University of Pablo de Olavide, 41013 Seville, Spain
* Author to whom correspondence should be addressed.
Received: 6 August 2013; in revised form: 8 September 2013 / Accepted: 29 September 2013 / Published: 11 October 2013
Abstract: A secondary treatment for olive mill wastewater coming from factories working with the two-phase olive oil production process (OMW-2) has been set-up on an industrial scale in an olive oil mill in the premises of Jaén (Spain). The secondary treatment comprises Fenton-like oxidation followed by flocculation-sedimentation and filtration through olive stones. In this work, performance modelization and preliminary cost analysis of a final reverse osmosis (RO) process was examined on pilot scale for ulterior purification of OMW-2 with the goal of closing the loop of the industrial production process. Reduction of concentration polarization on the RO membrane equal to 26.3% was provided upon increment of the turbulence over the membrane to values of Reynolds number equal to 2.6 × 104. Medium operating pressure (25 bar) should be chosen to achieve significant steady state permeate flux (21.1 L h−1 m−2) and minimize membrane fouling, ensuring less than 14.7% flux drop and up to 90% feed recovery. Under these conditions, irreversible fouling below 0.08 L h−2 m−2 bar−1 helped increase the longevity of the membrane and reduce the costs of the treatment. For 10 m3 day−1 OMW-2 on average, 47.4 m2 required membrane area and 0.87 € m−3 total costs for the RO process were estimated.
Keywords: olive mill wastewater; advanced oxidation processes; membrane processes; reverse osmosis; wastewater reclamation; modelization
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MDPI and ACS Style
Ochando-Pulido, J.M.; Hodaifa, G.; Victor-Ortega, M.D.; Martinez-Ferez, A. Performance Modeling and Cost Analysis of a Pilot-Scale Reverse Osmosis Process for the Final Purification of Olive Mill Wastewater. Membranes 2013, 3, 285-297.
Ochando-Pulido JM, Hodaifa G, Victor-Ortega MD, Martinez-Ferez A. Performance Modeling and Cost Analysis of a Pilot-Scale Reverse Osmosis Process for the Final Purification of Olive Mill Wastewater. Membranes. 2013; 3(4):285-297.
Ochando-Pulido, Javier M.; Hodaifa, Gassan; Victor-Ortega, Maria D.; Martinez-Ferez, Antonio. 2013. "Performance Modeling and Cost Analysis of a Pilot-Scale Reverse Osmosis Process for the Final Purification of Olive Mill Wastewater." Membranes 3, no. 4: 285-297.