Hybrid anaerobic reactor: brewery wastewater and piggery effluent valorisation

• A. Neves ^[1] ; L.B. Roseiro ^[1] ; L. Ramalho ^[1] ; A. Eusébio ^[1] ; I.P. Marques ^[1]
  1. [1] LNEG-Unit of Bioenergy
• Localización: Wastes: solutions, treatments and opportunities III / Cândida Vilarinho (dir.), Fernando Castro (dir.), Margarida Gonçalves Neto (dir.), Ana Luísa Fernando (dir.), 2020, ISBN 9780367257774, págs. 62-68
• Idioma: inglés
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• Resumen

  • A hybrid anaerobic reactor (HAR) operated to digest brewery wastewater, complemented with piggery effluent (60% and 40% v/v, respectively), under three hydraulic retention times: HRT: 5.7, 3.0 and 1.0 d. Along the first phase, the biogas of 0.9 LL−1d−1 evolved to 1.2 LL−1d−1 with a methane content of 77–78%. The HRT reduction to 3 days promoted the production until 2.1 LL−1 d−1, with methane proportions of 79.5%. The operation with an even lower HRT (1 d) allowed to obtain a higher biogas (2.9 LL−1d−1, 79.5% CH4). HAR was successfully applied to the mixture digestion, even with a HRT as low as 1 day. Phenolic compounds with antioxidant capacity in effluent adds value, besides the supply of biogas/methane.