title: Tetracycline removal and effect on the formation and degradation of extracellular polymeric substances and volatile fatty acids in the process of hydrogen fermentation.
abstract: 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.
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Guangying
authors.initials: G
authors.lastname: Hou
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Hao
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Rutao
authors.initials: R
authors.lastname: Liu
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. Electronic address: chunguangliu2013@sdu.edu.cn.
authors.forename: Chunguang
authors.initials: C
authors.lastname: Liu
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D020148:Butyric Acid / Q000378:metabolism; D005232:Fatty Acids, Volatile / Q000096:biosynthesis; D005285:Fermentation; D006859:Hydrogen / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000378:metabolism; D011422:Propionates; D012722:Sewage / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013752:Tetracycline / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D018505:Waste Management / Q000379:methods; D003313:Zea mays / Q000737:chemistry
chemical_list: D005232:Fatty Acids, Volatile; D011422:Propionates; D012722:Sewage; D020148:Butyric Acid; D006859:Hydrogen; D013752:Tetracycline; C029658:propionic acid; D008697:Methane
keywords: Anaerobic digestion; Antibiotics; EEM; EPSs; Sludge; VFAs