Biogas production from N-rich wastes: SAOB-HM enriched digester versus hydrophobic membrane assisted digester
Hydrophobic membranes (HMM) are common in water purification processes to separate volatile compounds.When such membranes are combined with anaerobic digesters (AD),inhibitory phenomena affecting methanogenesis due to ammonium nitrogen,would be overcome.In this work,four continuous AD were operated under high N level and similar conditions (feed composition and loading,temperature and inoculum).Two AD were coupled to HMM with different membrane surface area to digester volume ratio (Am/V),while the third AD had not membrane (control AD).A fourth reactor was operated at high retention time to prompt the syntrophic acetate oxidation (SAO) route.Despite the similar total N inlet content (3.5-4.3 gN L-1),reactor performances were completely different,depending on the Am/V ratio for low retention time values.Conversely,upon operation at a high retention time,the enrichment of acetate syntrophic oxidizing bacteria and hydrogenotrophic methanogens (SAOB-HM) prevented ammonia inhibition.A modified ADM 1 model,which included ammonia extraction by HMM and the SAOB population,fitted to the experimental data and helped to understand the observed patterns.
N-rich wastes hydrophobic membranes syntrophic acetate oxidizers biogas,methane
J.Ruiz-Sánchez A.López V.Riau F.X.Prenafeta-Boldú B.Fernández X.Flotats
GIRO Joint Research Unit IRTA-UPC.IRTA.Torre Marimon, E-08140 Caldes de Montbui, Barcelona, France GIRO Joint Research Unit IRTA-UPC.Dept.of Agrifood Engineering and Biotecnology.Universitat Politècn
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
695-698
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）