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Master's Dissertation
DOI
https://doi.org/10.11606/D.18.2018.tde-16042018-150639
Document
Author
Full name
Pâmela Castilho Dias
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2017
Supervisor
Committee
Damianovic, Márcia Helena Rissato Zamariolli (President)
Araújo Júnior, Moacir Messias de
Okada, Dagoberto Yukio
Title in Portuguese
Tratamento da fração líquida de estrume bovino em reator anaeróbio híbrido em escala piloto
Keywords in Portuguese
Biodegradabilidade
Bovinocultura de leite
Estrume bovino
Produção de metano
Reator anaeróbio híbrido
Abstract in Portuguese
O presente trabalho teve como principal objetivo avaliar o desempenho de um reator anaeróbio híbrido (RAnH) em escala piloto no tratamento da fração líquida de estrume bovino, visando à remoção de matéria orgânica e à produção de biogás. O RAnH estudado apresentava volume total 6,2 m3 e foi composto por manta de lodo, na qual a biomassa encontrava-se suspensa, e leito fixo, no qual utilizou-se Biobob® como material suporte para imobilização da biomassa. Para dar suporte a partida do RAnH, a água residuária em estudo foi submetida a teste de biodegradabilidade visando avaliar a influencia da inoculação do reator no potencial de biodegradabilidade e de produção de metano. No teste, a inoculação mostrou-se adequada, apresentando biodegradabilidade de 57 ± 4% e produção de metano de 344 ± 26 mL CH4. g SV-1. A operação do RAnH foi realizada por 260 dias e foi dividida em duas etapas: etapa inicial, na qual se procedeu a adequação da operação do reator, e etapa experimental, na qual se avaliou o desempenho do reator perante o aumento progressivo da carga orgânica aplicada. Durante a operação do reator foi alcançada a aplicação de COV bruta total de 25,50 ± 2,53 kg DQO.m-3.d-1 e a COV solúvel total de 7,69 ± 0,02 kg DQO.m-3.d-1, sendo atingido o TDH de 1,27 ± 0,004 d. O RAnH apresentou eficiência de remoção média de 65 ± 4 % durante a etapa experimental. A produção média de metano foi de 0,310 ± 0,095 m3 CH4. m-3.d-1 e 0,098 ± 0,018 m3 CH4. kg SVad, com 89 ± 3% de metano na composição do biogás. O potencial de produção de energia elétrica estimada com base no reaproveitamento metano produzido no RAnH foi de 0,89 kWh.m-3. O aproveitamento desta energia em sistema com vazão de 3.500 m3.d-1 geraria energia suficiente para abastecer 615 residências e uma economia mensal de R$ 11.835,09.
Title in English
Treatment of liquid fraction of dairy manure in a pilot-scale anaerobic hybrid reactor
Keywords in English
Anaerobic hybrid reactor
Biodegradability
Dairy cattle
Dairy manure
Methane production
Abstract in English
The main objective of this work was to evaluate the performance of a pilot-scale anaerobic hybrid reactor (RAnH) in the treatment of the liquid fraction of dairy manure, in order to remove organic matter and produce biogas. The applied RAnH had a total volume of 6.2 m3 and was composed of sludge blanket, in which the biomass was suspended, and fixed bed, in which Biobob® was applied as a support material for biomass immobilization. In order to support RAnH startup, the wastewater under study was submitted to a biodegradability test to evaluate the influence of reactor inoculation on the biodegradability potential and methane production potential. In the test the inoculated condition presented appropriate biodegradability (57 ± 4%) and higher methane production potential (344 ± 26 mL CH4.gVS-1). The RAnH operation was performed for 260 days and was divided into two stages: initial stage, in which the reactor operation was adjusted, and the experimental stage, in which the reactor performance was evaluated with the progressive increase of the applied organic load. During the reactor operation was reachead total raw VOC application of 25.50 ± 2.53 kg COD m-3.d-1 and total soluble VOC of 7.69 ± 0.02 kg COD m-3.d-1, with the HRT of 1.27 ± 0.004 d. The RAnH presented average removal efficiency of 65 ± 4% during the experimental stage. The average methane production was 0.310 ± 0.095 m3 CH4.m-3.d-1 and 0.098 ± 0.018 m3 CH4. kg VSad, with 89 ± 3% of methane in the biogas composition. The potential of electric energy production estimated based on the reuse of the methane produced in the RAnH was 0,89 kWh.m-3. The use of this energy in a system with a flow of 3,500 m3.d-1 would generate sufficient energy to supply 615 homes and a monthly saving of R$ 11,835.09.
 
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Publishing Date
2018-06-11
 
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