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Energetic valorisation of olive mill wastewater impregnated on low cost absorbent: Sawdust versus olive solid waste

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  • Chouchene, Ajmia
  • Jeguirim, Mejdi
  • Favre-Reguillon, Alain
  • Trouvé, Gwenaelle
  • Le Buzit, Gérard
  • Khiari, Besma
  • Zagrouba, Fethi

Abstract

The oil extraction industry generates two by-products, an aqueous effluent, olive mill wastewater (OMWW) and a solid residue, olive mill solid waste (OMSW). OMWW is considered as the major pollutant in the Mediterranean area causing severe environmental threats. The main problem regarding the disposal of OMWW is to find an environmental and economical viable solution. A new valorisation strategy has been carried out which includes the following steps: (a) absorption of OMWW on low-cost renewable absorbents, (b) natural evaporation of the water and (c) energy recovery by combustion of the impregnated absorbents. Sawdust and OMSW were selected as low-cost renewable absorbents. Thermal behaviour of the impregnated samples was studied under inert and oxidative atmosphere from 20 °C to 900 °C using thermogravimetric analysis (TGA). Kinetic parameters were obtained and compared for the different samples. Gaseous emissions such as CO2, CO and volatile organic compounds (VOC) were measured under oxidative conditions at 500 °C, 600 °C and at 700 °C in a fixed bed reactor. The results indicate that for samples containing the same amount of OMWW, the reaction time of impregnated sawdust is lower compared to impregnated OMSW. Combined treatment of OMMW proposed in this study may be a promising method for the reduction of their environmental impact and for the energetic valorisation of the organic content of OMWW.

Suggested Citation

  • Chouchene, Ajmia & Jeguirim, Mejdi & Favre-Reguillon, Alain & Trouvé, Gwenaelle & Le Buzit, Gérard & Khiari, Besma & Zagrouba, Fethi, 2012. "Energetic valorisation of olive mill wastewater impregnated on low cost absorbent: Sawdust versus olive solid waste," Energy, Elsevier, vol. 39(1), pages 74-81.
    • Handle: RePEc:eee:energy:v:39:y:2012:i:1:p:74-81
    DOI: 10.1016/j.energy.2011.03.044
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    References listed on IDEAS

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    1. Gonçalves, M.R. & Costa, J.C. & Marques, I.P. & Alves, M.M., 2011. "Inoculum acclimation to oleate promotes the conversion of olive mill wastewater to methane," Energy, Elsevier, vol. 36(4), pages 2138-2141.
    2. Chen, Wei-Hsin & Kuo, Po-Chih, 2011. "Torrefaction and co-torrefaction characterization of hemicellulose, cellulose and lignin as well as torrefaction of some basic constituents in biomass," Energy, Elsevier, vol. 36(2), pages 803-811.
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    1. El may, Yassine & Jeguirim, Mejdi & Dorge, Sophie & Trouvé, Gwenaelle & Said, Rachid, 2012. "Study on the thermal behavior of different date palm residues: Characterization and devolatilization kinetics under inert and oxidative atmospheres," Energy, Elsevier, vol. 44(1), pages 702-709.
    2. Andrius Tamošiūnas & Ajmia Chouchène & Pranas Valatkevičius & Dovilė Gimžauskaitė & Mindaugas Aikas & Rolandas Uscila & Makrem Ghorbel & Mejdi Jeguirim, 2017. "The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal," Energies, MDPI, vol. 10(5), pages 1-14, May.
    3. Kraiem, Nesrine & Jeguirim, Mejdi & Limousy, Lionel & Lajili, Marzouk & Dorge, Sophie & Michelin, Laure & Said, Rachid, 2014. "Impregnation of olive mill wastewater on dry biomasses: Impact on chemical properties and combustion performances," Energy, Elsevier, vol. 78(C), pages 479-489.

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