초록
<P><B>Abstract</B></P> <P>Many research indicate antibiotics show adverse effect on methane fermentation, while few research focus on their effect on hydrogen fermentation. The present study aimed to gain insight of the effect of antibiotics on hydrogen fermentation with waste sludge and corn straw as substrate. For this purpose, tetracycline, as a model, was investigated with regard to tetracycline removal, hydrogen production, interaction with extracellular polymeric substances (EPSs) of substrate and volatile fatty acids (VFAs) on concentration and composition. Results show that tetracycline could be removed efficiently by hydrogen fermentation, and relative low-dose tetracycline (200mg/l) exposure affects little on hydrogen production. While tetracycline exposure could change hydrogen fermentation from butyric acid-type to propionic acid-type depending on tetracycline level. Based upon three-dimensional excitation–emission matrix fluorescence spectroscopy and UV–vis tetracycline changed the component and content of EPSs, and static quenching was the main mechanism between EPSs with tetracycline.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effect of tetracycline (Tet.) exposure on hydrogen production was assessed. </LI> <LI> Tet. removal by hydrogen co-fermentation of sludge and corn straw was studied. </LI> <LI> Roles of EPSs on Tet. removal and the interaction mechanism was determined. </LI> <LI> Effect of Tet. exposure on the production and degradation way of VFAs was stated. </LI> </UL> </P>