Rhodobacter and pigments in anaerobic digestion of brewery effluent

• A. Neves ^[1] ; L. Ramalho ^[1] ; I.P. Marques ^[1] ; A. Eusébio ^[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. 269-274
• Idioma: inglés
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• Resumen

  • Brewery wastewater (BWW) was digested anaerobically in mesophilic conditions and batch mode. The presence of a reddish pigmentation associated to the better removal capacity of the BWW digestion (64%), indicates that the treatment and energetic valorisation of an organic effluent can occur at the same time and inside the same unit as the production of a photosynthetic pigment. The reddish pigmentation found in this experiment was mainly attributed to bacteriochlorophyll a, and to carotenoids pigments of the spirilloxantin series (characteristics of purple non-sulfur bacteria). Microbial identification through Next-generation sequencing of 16S rRNA genes showed the presence of bacterial genus Rhodobacter in the inoculum and in anaerobic digestion of BWW.