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Fresh olive mill waste deprived of polyphenols as feedstock for hydrogen photo-production by means of Rhodopseudomonas palustris 42OL

Author

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  • Pintucci, Cristina
  • Giovannelli, Alessio
  • Traversi, Maria Laura
  • Ena, Alba
  • Padovani, Giulia
  • Carlozzi, Pietro

Abstract

In the present study, fresh olive mill waste (OMWF) was processed using an innovative pre-treatment based on the adsorption capacity of two natural matrices. The liquid fraction coming from the pre-treatment is an inexpensive feedstock for hydrogen photo-production by means of purple non-sulphur photosynthetic bacteria (PNSB). The culture broth, which contained OMWF (30%) and distilled water (70%) was tested for hydrogen photo-production using Rhodopseudomonas palustris 42OL. The photo-fermentative process was studied under batch growth conditions, at three different irradiances (18.5, 37 and 74 W/m2). The lowest cumulative amount of hydrogen (439 ml-H2/L-broth) was attained at the irradiance of 18.5 W/m2, while the highest one (1030 ml-H2/L-broth) was obtained at the irradiance of 74 W/m2. The resulting average hydrogen evolution rates (HPRavg), which were based on the culture volume and were attained at the three different irradiances (i.e. 18.5, 37 and 74 W/m2), were 1.40, 3.17 and 5.28 ml-H2/L-broth/h respectively. The culture age at which the hydrogen photo-evolution ceased showed an inverse proportionality as compared to the irradiance: i.e. the higher the irradiance, the lower the culture age. On the contrary, the COD removal efficiency (CODRE) increased depending on the irradiance. The maximal light conversion efficiency (1.07%) was attained at the irradiance of 37 W/m2, and decreased at both lower and higher irradiances.

Suggested Citation

  • Pintucci, Cristina & Giovannelli, Alessio & Traversi, Maria Laura & Ena, Alba & Padovani, Giulia & Carlozzi, Pietro, 2013. "Fresh olive mill waste deprived of polyphenols as feedstock for hydrogen photo-production by means of Rhodopseudomonas palustris 42OL," Renewable Energy, Elsevier, vol. 51(C), pages 358-363.
    • Handle: RePEc:eee:renene:v:51:y:2013:i:c:p:358-363
    DOI: 10.1016/j.renene.2012.09.037
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    References listed on IDEAS

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    1. Carlozzi, Pietro & Lambardi, Maurizio, 2009. "Fed-batch operation for bio-H2 production by Rhodopseudomonas palustris (strain 42OL)," Renewable Energy, Elsevier, vol. 34(12), pages 2577-2584.
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    Cited by:

    1. Alessio Siciliano & Maria Assuntina Stillitano & Carlo Limonti, 2016. "Energetic Valorization of Wet Olive Mill Wastes through a Suitable Integrated Treatment: H 2 O 2 with Lime and Anaerobic Digestion," Sustainability, MDPI, vol. 8(11), pages 1-15, November.
    2. Siciliano, A. & Stillitano, M.A. & De Rosa, S., 2016. "Biogas production from wet olive mill wastes pretreated with hydrogen peroxide in alkaline conditions," Renewable Energy, Elsevier, vol. 85(C), pages 903-916.
    3. Pietro Carlozzi & Giulia Padovani & Patrizia Cinelli & Andrea Lazzeri, 2015. "An Innovative Device to Convert Olive Mill Wastewater into a Suitable Effluent for Feeding Purple Non-Sulfur Photosynthetic Bacteria," Resources, MDPI, vol. 4(3), pages 1-16, August.

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