Removal of veterinary antibiotics from swine wastewater using anaerobic and aerobic biodegradation
Removal of veterinary antibiotics from swine wastewater using anaerobic and aerobic biodegradation
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DOI：
10.1016/j.scitotenv.2019.136094
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发表时间：
2020-03-20
影响因子：
9.8
通讯作者：
Shen, Genxiang
中科院分区：
文献类型：
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作者：
Han, Yuefei;Yang, Linyan;Shen, Genxiang
动物养殖场用于预防疾病的大量抗生素被释放回自然环境，可能对其他生物体造成慢性毒性，并产生抗药性基因。在猪场废水中检出的磺胺类和β-内酰胺类抗生素在99.2至339.3 μ g/L之间。典型的现场养猪废水处理工艺被证明是不充分的，这反映在即使在长的水力停留时间（HRT，约2-3个月）下也存在高的常规污染物和抗生素残留。实验室规模的厌氧-好氧组合生物工艺表明，厌氧消化主要负责化学需氧量（COD）的降低，好氧生物降解对抗生素的去除贡献显著，在3.3 d的短HRT下，COD和抗生素的总去除率分别为95%和92%。选定的抗生素的去除可能是生物降解，吸附和解吸之间的平衡，以及抗生素代谢产物与其母体抗生素之间的转化的综合结果。目前的工作提供了有价值的见解，适当的选择和优化的生物工艺处理典型的高COD和微量抗生素的废水。(C)2019 Elsevier B. V.版权所有。
High amounts of antibiotics, used in animal farms for the prevention of diseases, are released back into the natural environment with a possible risk of chronic toxicity to other organisms and the development of antibiotic-resistant genes. The antibiotics, including sulfonamides and beta-lactams, detected in swine wastewater were between 99.2 and 339.3 mu g/L. The typical on-site swine wastewater treatment process turned out to be inadequate, reflected by the high conventional contaminant and antibiotic residuals even under a long hydraulic residence time (HRT, around 2-3 months). The lab-scale combined anaerobic and aerobic biological process showed that anaerobic digestion was mainly responsible for chemical oxygen demand (COD) reduction and aerobic biodegradation contributed significantly to antibiotic removal, with overall removal efficiencies of 95% for COD and 92% for antibiotics under a short HRT of 3.3 days. The removal of selected antibiotics could be a combined result of biodegradation, the balance between adsorption and desorption, and the transformation between antibiotic metabolites and their parent antibiotics. The current work provides valuable insights into the appropriate selection and optimisation of biological processes for the treatment of typical wastewater with high COD and trace antibiotics. (C) 2019 Elsevier B.V. All rights reserved.