Biogas: olive mill wastewater as complementary substrate of piggery effluent

Neves, André; Ramalho, Luís; Eusebio, Ana; Marques, Isabel Paula; Roseiro, Luisa B.

http://hdl.handle.net/10400.9/3221

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Authors

Neves, André

Ramalho, Luís

Eusebio, Ana

Marques, Isabel Paula

Roseiro, Luisa B.

Abstract(s)

ABSTRACT: he anaerobic digestion of a peculiar piggery effluent (PE), with a high organic content (93 g/L), was carry out using olive mill wastewater (OMW) as complementary substrate. From the different tested conditions–[100% PE],[70% PE+ 30% OMW],[50% PE+ 50% OMW],[20% PE+ 80% OMW]–units containing only PE and the lowest proportion of OMW in the mixture (30% OMW), provided the highest biogas volume of about 780 mL (70% CH4). Comparatively, identical quantities of each substrate ([50% PE+ 50% OMW]) generates some gas (320 mL, 60% CH4), understood as the result of an adaptation process by the microbial consortium, while the [20% PE+ 80% OMW] condition provided even less gas volume (120 mL, 6% CH4), probably due to the antimicrobial capacity of the phenolic compounds in OMW, confirming the negative influence of using so high OMW proportion.

Keywords

Anaerobic digestion Wastewater treatment Piggery effluent Biogas production Olive mill wastewater

URI

http://hdl.handle.net/10400.9/3221

Citation

Neves, A... [et.al.] - Biogas: olive mill wastewater as complementary substrate of piggery effluent. In: Wastes: Solutions, Treatments and Opportunities III: Selected Papers from the 5th International Conference Wastes 2019, September 4-6, 2019, Lisbon, Portugal. Vilarinho et al. (Eds) Taylor & Francis Group, London, p. 55-61