会议专题

Fate of organic micropollutants during the methanogenic step of anaerobic digestion

  Despite the presence of organic micropollutants (OMPs) in sewage sludge is still not regulated,there are risks associated with their accumulation in biosolid-amended soils.Therefore,their removal during sludge anaerobic digestion (AD) should be promoted.To do so,the mechanisms and factors influencing the fate and biotransformation of OMPs during AD must be identified.This study focuses on investigating the fate of 20 usually detected micropollutants in sewage sludge during methanogenesis.Kinetic experiments in continuously stirred methanogenic digesters were performed at two different organic loading rates (OLR).The fate of selected OMPs was straight related to the solid-liquid partition coefficient (Kd): some of them remained mainly in the liquid phase,meanwhile others sorbed onto solids.The Kd values in methanogenic biomass were similar to those reported for digested sludge.Experimental results suggest that methanogcnic biotransformation takes place at different extents,depending on the OMP.Total concentrations were adjusted to a pseudo-first order kinetic model,and no significant differences in the biotransformation rates could be attributed to the OLR.

Biotransformation kinetics methanogenesis partitioning coefficient sewage sludge

L.Gonzalez-Gil D.Serrano M.Mauricio-Iglesias J.M.Lema M.Carballa

Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, R Department of Water and Environmental Sciences, Instituto Tecnológico de Sonora, 5 de febrero 818 su

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

95-98

2017-10-17(万方平台首次上网日期,不代表论文的发表时间)