Swine effluent treatment using anaerobic digestion at different loading rates

Engenharia Agrícola

André C. Do Amaral¹  Airton Kunz²  Ricardo L. R. Steinmetz²  Fábio Cantelli²  Lucas A. Scussiato²  Karin C. Justi² 

[1] ,UNICENTROGuarapuava PR

关键词: hydraulic retention time;    biogas production;    animal wastewater;    tempo de retenção hidráulica;    produção de biogás;    resíduos animais;   

DOI  :  10.1590/S0100-69162014000300019

来源: SciELO

【 摘 要 】

The industrial swine production is characterized by generation of significant effluent amounts that require treatment. The most adopted practices by Brazilian swine farmers have been wastewater storage in lagoons and its subsequent use as a biofertilizer. Nutrient accumulation in soil and water creates the need for an effective management of these residues. The anaerobic digestion process is an important alternative and low-cost treatment for organic matter reduction. However, its efficiency is limited by the digester capacity of solid degradation, especially at low hydraulic retention times. Thus, the present study aimed to verify the behavior of an upflow anaerobic digester by increasing the organic loading rate. This was accomplished in three stages using, as a parameter, volatile solids at 0.5; 1.0 and 1.5 kgVS m-3 d-1, respectively. This digester model proved to be quite robust and effective in swine manure treatment, achieving high efficiency of volatile solid removal at all stages of the study (stage 1: 61.38%; stage 2: 55.18%; and stage 3: 43.18%). Biogas production was directly related to the increasing organic load, reaching 0.14, 0.85, and 0.86 Nm³ kgVS-1add., respectively, with no significant difference (p<0.05) of biogas methane concentration among the studied stages (73.7, 75.0, and 77.9%).

【 授权许可】

CC BY   
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