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Influence of roxithromycin as antibiotic residue on volatile fatty acids recovery in anaerobic fermentation of waste activated sludge.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-03-20 , DOI: 10.1016/j.jhazmat.2020.122570 Hongbo Chen 1 , Xingning Zeng 1 , Yaoyu Zhou 2 , Xiao Yang 3 , Su Shiung Lam 4 , Dongbo Wang 5
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-03-20 , DOI: 10.1016/j.jhazmat.2020.122570 Hongbo Chen 1 , Xingning Zeng 1 , Yaoyu Zhou 2 , Xiao Yang 3 , Su Shiung Lam 4 , Dongbo Wang 5
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The removal of antibiotics and resistance genes in wastewater treatment plants has attracted widespread attention, but the potential role of residual antibiotics in the disposal of waste activated sludge (WAS) has not been clearly understood. In this study, the effect of roxithromycin (ROX) on volatile fatty acid (VFA) recovery from WAS anaerobic fermentation was investigated. The experimental results showed that ROX made a positive contribution to the production of VFAs. With the increase of ROX dosages from 0 to 100 mg/kg TSS, the maximum accumulation of VFAs increased from 295 to 610 mg COD/L. Mechanism studies revealed that ROX promoted the solubilization of WAS by facilitating the disruption of extracellular polymeric substances. In addition, ROX enhanced the activity of acetate kinase and inhibited the activities of α-glucosidase and coenzyme F420, and showed a stronger inhibitory effect on methane production than the hydrolysis process, thus resulting in an increase in VFA accumulation. These findings provide a new insight for the role of antibiotics in anaerobic fermentation of WAS.
中文翻译：
罗红霉素作为抗生素残留物对废活性污泥厌氧发酵中挥发性脂肪酸回收的影响。
废水处理厂中抗生素和抗性基因的去除已引起广泛关注，但是，残留抗生素在废物活性污泥（WAS）处置中的潜在作用还不清楚。在这项研究中，研究了罗红霉素（ROX）对WAS厌氧发酵回收挥发性脂肪酸（VFA）的影响。实验结果表明，ROX对VFA的产生有积极的贡献。随着ROX剂量从0到100 mg / kg TSS增加，VFA的最大积累量从295 mg / L增加到610 mg COD / L。机理研究表明，ROX通过促进细胞外聚合物的破坏而促进了WAS的溶解。此外，ROX增强了乙酸激酶的活性，并抑制了α-葡萄糖苷酶和辅酶F420的活性，并且对甲烷生成的抑制作用比水解过程强，因此增加了VFA的积累。这些发现为WAS厌氧发酵中抗生素的作用提供了新的见解。
更新日期：2020-03-21
中文翻译：
罗红霉素作为抗生素残留物对废活性污泥厌氧发酵中挥发性脂肪酸回收的影响。
废水处理厂中抗生素和抗性基因的去除已引起广泛关注，但是，残留抗生素在废物活性污泥（WAS）处置中的潜在作用还不清楚。在这项研究中，研究了罗红霉素（ROX）对WAS厌氧发酵回收挥发性脂肪酸（VFA）的影响。实验结果表明，ROX对VFA的产生有积极的贡献。随着ROX剂量从0到100 mg / kg TSS增加，VFA的最大积累量从295 mg / L增加到610 mg COD / L。机理研究表明，ROX通过促进细胞外聚合物的破坏而促进了WAS的溶解。此外，ROX增强了乙酸激酶的活性，并抑制了α-葡萄糖苷酶和辅酶F420的活性，并且对甲烷生成的抑制作用比水解过程强，因此增加了VFA的积累。这些发现为WAS厌氧发酵中抗生素的作用提供了新的见解。
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