Techno-economic anaerobic co-digestion feasibility study for two-phase olive oil mill pomace and pig slurry

Anaerobic mono- (AmoD) and co-digestion (AcoD) of two-phase olive oil mill pomace (TPOP) and pig slurry (PS) at different ratios were studied in a semi-continuous stirred tank reactor (sCSTR) at mesophilic temperature (37 °C). The methane yields for AcoD experiments ranged from 150.9 to 274.3 L CH4 kg VS−1 d−1. The maximum chemical oxygen demand (COD) removal rate (59.60%) was achieved for TPOP/PS 80:20 w/w substrate composition at OLR 3.68 g VS Lreactor−1 d−1 and 24 days HRT. Despite the energy production from food waste is not a new process, the industrial implementation and application continue to be a challenge. Hence, the present paper also reports on the economic feasibility study of a full scale anaerobic co-digestion plant to treat 7000 t year−1 and 1750 t year−1 of TPOP and PS, respectively. The results of this study are compared against a conventional PS mono-digestion plant. Net present values (NPV) and payback time periods (PBT) were reported to be 782,493 € and 135,701 € and 6.7 and 9.2 years for AcoD and AmoD plants, respectively. Finally, the sensibility analysis concluded that AcoD configuration is less dependent on energy and compost sale prices variations.

[1]  M. Martín,et al.  The effect of organic loading rate on the anaerobic digestion of two-phase olive mill solid residue derived from fruits with low ripening index , 2007 .

[2]  David J. Hills,et al.  Effects of carbon: Nitrogen ratio on anaerobic digestion of dairy manure , 1979 .

[3]  M. Alves,et al.  Strategies for lipids and phenolics degradation in the anaerobic treatment of olive mill wastewater. , 2012, Water research.

[4]  F. El-Gohary,et al.  Potentials of anaerobic treatment for catalytically oxidized olive mill wastewater (OMW). , 2009, Bioresource technology.

[5]  J. Schmidt,et al.  Anaerobic digestion of olive oil mill effluents together with swine manure in UASB reactors. , 2002, Water science and technology : a journal of the International Association on Water Pollution Research.

[6]  Rafael Borja,et al.  Kinetics of mesophilic anaerobic digestion of the two-phase olive mill solid waste , 2003 .

[7]  V. L. Singleton,et al.  Colorimetry of Total Phenolics with Phosphomolybdic-Phosphotungstic Acid Reagents , 1965, American Journal of Enology and Viticulture.

[8]  R. Borja,et al.  Influence of immobilization supports on the kinetic constants of anaerobic purification of olive mill wastewater , 1990 .

[9]  Vilas Nitivattananon,et al.  Green waste to biogas: Renewable energy possibilities for Thailand's green markets , 2012 .

[10]  Carol Sze Ki Lin,et al.  Techno-economic analysis of a food waste valorization process via microalgae cultivation and co-production of plasticizer, lactic acid and animal feed from algal biomass and food waste. , 2015, Bioresource technology.

[11]  V. O’Flaherty,et al.  Bioremediation of olive mill wastewater , 2008 .

[12]  R. Borja,et al.  Evaluation of the methanogenic step of a two-stage anaerobic digestion process of acidified olive mill solid residue from a previous hydrolytic-acidogenic step. , 2009, Waste management.

[13]  Irini Angelidaki,et al.  Optimization of biogas production by co-digesting whey with diluted poultry manure , 2007 .

[14]  A. Crolla,et al.  Statistical modelling of the impact of some polyphenols on the efficiency of anaerobic digestion and the co-digestion of the wine distillery wastewater with dairy cattle manure and cheese whey. , 2010, Water science and technology : a journal of the International Association on Water Pollution Research.

[15]  J. Lay,et al.  INFLUENCES OF pH AND MOISTURE CONTENT ON THE METHANE PRODUCTION IN HIGH-SOLIDS SLUDGE DIGESTION , 1997 .

[16]  M. Majone,et al.  Role of Lipids and Phenolic Compounds in the Anaerobic Treatment of Olive Oil Mill Effluents , 1999 .

[17]  S. Fuentes,et al.  Molecular microbial and chemical investigation of the bioremediation of two-phase olive mill waste using laboratory-scale bioreactors , 2008, Applied Microbiology and Biotechnology.

[18]  M. Meuwissen,et al.  Economic analysis of anaerobic digestion—A case of Green power biogas plant in The Netherlands , 2010 .

[19]  Evan Diamadopoulos,et al.  Technologies for olive mill wastewater (OMW) treatment: a review , 2006 .

[20]  E. Sánchez,et al.  Comparative effect of different aerobic pretreatments on the kinetics and macroenergetic parameters of anaerobic digestion of olive mill wastewater in continuous mode , 1998 .

[21]  Sami Sayadi,et al.  The effect of Phanerochaete chrysosporium pretreatment of olive mill waste waters on anaerobic digestion , 1999 .

[22]  I. P. Marques,et al.  Anaerobic digestion treatment of olive mill wastewater for effluent re-use in irrigation , 2001 .

[23]  S. P. Tsonis,et al.  Anaerobic Treatability of Olive Oil Mill Wastewater , 1993 .

[24]  Júlio M. Novais,et al.  Anaerobic co-treatment of olive mill and piggery effluents , 1997 .

[25]  Sotirios Karellas,et al.  Development of an investment decision tool for biogas production from agricultural waste , 2010 .

[26]  W. J. Dyer,et al.  A rapid method of total lipid extraction and purification. , 1959, Canadian journal of biochemistry and physiology.

[27]  R. Borja,et al.  Assessment of kinetic parameters for the mesophilic anaerobic biodegradation of two-phase olive pomace , 2004 .

[28]  Rafael Borja,et al.  Treatment technologies of liquid and solid wastes from two-phase olive oil mills , 2006 .

[29]  A. E. Greenberg,et al.  Standard Methods for the Examination of Water and Wastewater seventh edition , 2013 .

[30]  N. Kalogerakis,et al.  Treatment of olive mill effluents Part II. Complete removal of solids by direct flocculation with poly-electrolytes. , 2005, Environment international.

[31]  M. Kornaros,et al.  Biogas production from anaerobic co-digestion of agroindustrial wastewaters under mesophilic conditions in a two-stage process , 2009 .

[32]  Mark Broadie,et al.  Optimal Debt and Equity Values in the Presence of Chapter 7 and Chapter 11 , 2005 .

[33]  Michael Niaounakis,et al.  Olive Processing Waste Management: Literature Review and Patent Survey , 2006 .

[34]  Michael Kornaros,et al.  Exploitation of olive mill wastewater and liquid cow manure for biogas production. , 2010, Waste management.

[35]  A Roig,et al.  An overview on olive mill wastes and their valorisation methods. , 2006, Waste management.

[36]  R. Bachmann,et al.  Two-stage biological treatment of olive mill wastewater with whey as co-substrate , 2007 .

[37]  Beata Sliz-Szkliniarz,et al.  A GIS-based approach for evaluating the potential of biogas production from livestock manure and crops at a regional scale: A case study for the Kujawsko-Pomorskie Voivodeship , 2012 .

[38]  Abdullah Akbulut,et al.  Techno-economic analysis of electricity and heat generation from farm-scale biogas plant: Çiçekdağı case study , 2012 .

[39]  Elena Comino,et al.  Energy production from anaerobic co-digestion processing of cow slurry, olive pomace and apple pulp , 2015 .

[40]  Irini Angelidaki,et al.  Codigestion of olive oil mill wastewaters with manure, household waste or sewage sludge , 1997 .

[41]  G. Demirer,et al.  Anaerobic treatability and biogas production potential studies of different agro-industrial wastewaters in Turkey , 2004, Biodegradation.