Assessing the limits of methane biofiltration as mitigating technology for GHG emissions
Anaerobic reactors for sewage treatment produce methane that must be recovered and flared.However,a significant methane fraction is lost dissolved in the treated effluent and eventually desorbs to the atmosphere,contributing to greenhouse gas emissions.Methane oxidation in a biofiltration system could be an alternative to control this fugitive emission.In this study,a biofiltration model was calibrated and validated to describe methane oxidation in a compost biofilter (at stationary phase) with a removal efficiency of 90% and an elimination capacity of 62 g·m-3·h-1 (empty bed residence time,EBRT,of 20 min).Methane removal was evaluated at different conditions (inlet methane concentration,EBRT and operating temperature).Results showed that compost biofilter degraded up to 100 g·m3·h-1 with 80% of removal efficiency.From the results obtained,a recommendation for methane oxidation in a compost biofilter was done: treating dilute methane concentrations in air < 5% vol at an EBRT > 10 minutes.
Methane oxidation methane emissions biofiltration EBRT modeling
T.L.Gómez-Borraz A.González-Sánchez S.Revah A.Noyola
Instituto de Ingeniería, Universidad Nacional Autónoma de México, Ciudad de México.México Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana, Ciudad de México, México
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
765-768
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）