规模化猪场废水处理过程中四环素类和磺胺类抗生素的降解特征

发布时间：2018-05-16 15:06

本文选题：规模猪场 + 废水处理　；参考：《生态与农村环境学报》2016年06期

【摘要】：针对畜禽养殖场废水处理过程中抗生素的残留水平及其消减特征等问题,以苏南地区典型规模生猪养殖场为研究对象,探讨了冬季和夏季猪场废水处理各环节中四环素类(TCs)和磺胺类(SAs)抗生素的浓度及降解特征。结果发现,现有沼气工程进料浓度高,水力停留时间短,对土霉素(OTC)、金霉素(CTC)和强力霉素(DOX)的去除率分别为12.9%~69.3%、20.4%~60.9%和25.3%~55.0%,对磺胺嘧啶(SD)、磺胺二甲嘧啶(SM)和磺胺氯哒嗪(SCP)的去除率分别为13.8%~18.2%、46.8%~61.8%和18.1%~48.7%。冬季出料沼液中抗生素浓度远高于夏季,其中ρ(CTC)、ρ(SD)和ρ(SCP)平均值分别为0.887、0.492、和10.160μg·L~(-1),直接还田存在生物安全风险。沼液后处理(如沉淀池和水生植物塘)对大幅降低沼液中TCs和SAs有积极作用,且夏季去除率(90%)高于冬季,是沼液无害化处理和农田安全利用的重要措施。厌氧好氧生物处理组合工艺是养殖废水中抗生素(特别是SAs)有效降解的重要手段。
[Abstract]:Aiming at the problem of antibiotic residue level and its abatement characteristics in wastewater treatment of livestock and poultry farms, the typical scale pig farms in southern Jiangsu were studied. The concentration and degradation characteristics of tetracycline (TCs) and sulfadiazine (Sas) antibiotics in the treatment of pig farm wastewater in winter and summer were studied. The results show that the current biogas project has high feed concentration and short HRT. The removal rates of oxytetracycline, chlortetracycline (CTCX) and doxycycline (doxycycline) were 12.9% and 60.9% and 25.3%, respectively. The removal rates of sulfadiazine (SDN), sulfadimethylpyrimidine (SMN) and sulfadiazine (SCPP) were 13.818.26.88% and 18.11%, respectively. The concentration of antibiotics in the effluent in winter was much higher than that in summer. The average values of 蟻 ~ (CTC), 蟻 ~ (SDN) and 蟻 ~ (1) SCP were 0.887 ~ 0.492 and 10.160 渭 g / L ~ (-1), respectively, which indicated that there was a risk of biosafety in the field. Biogas sludge post-treatment (such as sedimentation tanks and aquatic plant ponds) has a positive effect on significantly reducing TCs and SAs in biogas liquid, and the removal rate in summer is 90% higher than that in winter, which is an important measure for harmless treatment of biogas liquid and safe utilization of farmland. The combined process of anaerobic aerobic biological treatment is an important method for the effective degradation of antibiotics (especially Sas) in aquaculture wastewater.
【作者单位】：江苏省农业科学院农业资源与环境研究所/江苏省农业废弃物资源化工程技术研究中心;农业部农村可再生能源开发利用华东科学观测实验站/农业部长江中下游平原农业环境重点实验室;江苏省食品质量安全重点实验室/省部共建国家重点实验室培育基地;江苏省耕地质量与农业环境保护站;南京农业大学资源与环境科学学院;
【基金】：江苏省农业科技自主创新资金〔CX(16)1003-1〕国家科技支撑计划(2015BAL04B05) 江苏省太湖水环境综合治理科研课题(TH2014209)
【分类号】：X713

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