The behaviour of an anaerobic baffled reactor (ABR) as the first stage in the biological treatment of hog farming effluents

• Autor(a) principal: Motteran, F.
• Data de Publicação: 2013
• Outros Autores: Pereira, E. L., Campos, C. M. M.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/13308
• topic: Anaerobic baffled reactor; Hog farming effluents; Anaerobic digestion; Methanogenic bacteria; Biogas; Reator anaeróbico desconcertado; Efluentes de criação de suínos; Digestão anaeróbica; Bactéria metanogênica; Biogás

This present paper reports a study of the efficiency of an anaerobic Baffled Reactor (ABR) composed of three chambers working as the first stage of a biological treatment system for swine wastewater, over a period of 116 days. The average value of the volumetric organic loading rate (VOLR) was 17.8 kgCODtotal m-3 d-1, the biological organic loading rates (BOLR) based on total and filtered COD influents of 14381 mg L-1 and 3610 mg L-1, respectively, were: 1.3 kgCODtotal kgTVS d-1 and 0.98 kgCODfiltered kgTVS d-1, respectively, and the hydraulic loading rate (HLR) was about 1.4 m3 m-3 d-1. The average removal efficiency for total COD was 80% at a hydraulic retention time (HRT) of about 18 hours. The average alkalinity in the effluent was 3801 mgCaCO3 L-1. The average removal efficiencies for oil and grease and total soluble solids were 41% and 78%, respectively. The sludge granulation and biogas production in the ABR were quite different between the first and third compartment, showing a distinct microbial consortium in each chamber. Through this research it was confirmed that this type of reactor can be employed as the first stage in a system treating swine wastewater.