An Innovative Device to Convert Olive Mill Wastewater into a Suitable Effluent for Feeding Purple Non-Sulfur Photosynthetic Bacteria

Pietro Carlozzi, Giulia Padovani, Patrizia Cinelli and Andrea Lazzeri
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Pietro Carlozzi: Istituto per lo Studio degli Ecosistemi, Sede di Firenze, Consiglio Nazionale delle Ricerche, Polo Scientifico, Sesto Fiorentino 50019, Firenze, Italy
Giulia Padovani: Istituto per lo Studio degli Ecosistemi, Sede di Firenze, Consiglio Nazionale delle Ricerche, Polo Scientifico, Sesto Fiorentino 50019, Firenze, Italy
Patrizia Cinelli: Istituto per i Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche, Unità di Pisa, Via Moruzzi 1, Pisa 56126, Italy
Andrea Lazzeri: Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM) c/o Dipartimento di Ingegneria Civile e Industriale, Università degli Studi di Pisa, Pisa 56126, Italy

Resources, 2015, vol. 4, issue 3, 1-16

Abstract: A device (prototype) with a working volume of 200 L was used to deplete olive mill wastewater (OMW) of polyphenols. The OMW transformed into feedstock by means of the device was then used for feeding a lab-scale photobioreactor, just for testing the production of bioH 2 . The main novelty of this prototype consists in the combination of several adsorbent matrices and the exploitation of their synergic action. In this investigation, three matrices have been used: active carbon, Azolla and zeolite. The device was operated at an olive oil company located in the heart of the Chianti zone (Province of Florence, Italy). The efficiency of polyphenol removal obtained using the device was ≥96%. The multi-matrix effluent (MM eff ) generated was then used to obtain three different culture broths containing 25%, 50% and 100% of MM eff , respectively. The diluted (with water) culture broths were suitable for hydrogen generation, with the highest hydrogen production rate (12.7 mL H 2 /L culture /h) being obtained using 50% MM eff . The hydrogen yields were: 334 mL H 2 /L of MM eff , when feeding the photofermenter with pure effluent (100%); 1308 mL H 2 /L of MM eff , with the half-diluted effluent (50%, v/v); and 432 mL H 2 /L of MM eff , with the highest-diluted effluent (25%, v/v).

Keywords: olive mill wastewater; pretreatment; dephenolization; adsorbent matrices; feedstock; hydrogen photo-production; Rhodopseudomonas palustris (search for similar items in EconPapers)
JEL-codes: Q1 Q2 Q3 Q4 Q5 (search for similar items in EconPapers)
Date: 2015
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