Encontro de Energia no Meio Rural

Abstract

FEIDEN, Armin, REICHL, Johann, SCHWAB, Jair et al. Avaliação da eficiência de um biogestor tubular na produção de biogás a partir de águas residuárias de suinocultura. In Procedings of the 5th Encontro de Energia no Meio Rural, 2004, Campinas (SP) [online]. 2004 [cited 14 October 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022004000100020&lng=en&nrm=iso> .

The performance of a plug-flow digester, type Reichl, was evaluated with and without mixing. The digester, treating swine wastewater, had a capacity of 800 m³ and were operated at a loading rate of 0,931 kg and 0,634 kg of total solids and volatile solids per day, respectively. With mixing, the daily average biogas production was 289,50 m³ day^-1, the specific volume production of 0,362 m³ biogas m^-3 reactor day^-1 and a specific biogas production of 0,389 m³ and 0,571 m³ biogas kg^-1 total solids and volatile solids added, respectively. Without mixing, was observed a reduction of 17,69% on the daily average biogas production, to only 238,30 m³ day^-1. It correspond to a specific volume production of 0,298 m³ biogas m^-3 reactor day^-1 and a specific biogas production of 0,320 m³ and 0,470 m³ biogas kg^-1 total solids and volatile solids added, respectively. With mixing, a reduction of 68,67% total solids was achieved, compared to 52,11% without mixing. Considering volatile solids, it was achieved 80,16% with mixing, compared to 58,77% without mixing.

Keywords : mixing; biogas; plug-flow digester; swine production.