中温期和高温期污泥堆肥物料中典型氟喹诺酮类抗生素去除的影响因素

姚全威; 张军; 严沁颖; 王敦球; 席北斗

doi:10.13205/j.hjgc.202009032

中温期和高温期污泥堆肥物料中典型氟喹诺酮类抗生素去除的影响因素

doi: 10.13205/j.hjgc.202009032

姚全威^1,2,3,
张军^1,2,3, ,,
严沁颖^1,2,
王敦球^1,2,3,
席北斗⁴

1. 桂林理工大学环境科学与工程学院, 广西桂林 541004;
2. 桂林理工大学广西环境污染控制理论与技术重点实验室, 广西桂林 541004;
3. 桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心, 广西桂林 541004;
4. 中国环境科学研究院, 北京 100012

基金项目:

国家自然科学基金项目（51868011）；广西自然科学基金项目（2018GXNSFGA281001）；广西科技重大专项（桂科AA18118013）；"广西特聘专家"专项经费资助。

详细信息

作者简介:
姚全威(1995-),男,硕士研究生,主要从事固体废弃物处理与资源化利用。yqw@glut.edu.cn

通讯作者:
张军(1983-),男,博士,副教授,主要从事固体废弃物处理与资源化利用。zjun@glut.edu.cn

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出版历程
- 收稿日期: 2019-07-21

MAIN FACTORS ON DISSIPATION OF TYPICAL FLUOROQUINOLONES IN SEWAGE SLUDGE COMPOST DURING MESOPHILIC AND THERMOPHILIC PHASES

YAO Quan-wei^1,2,3,
ZHANG Jun^{1,2,3
, ,},
YAN Qin-ying^1,2,
WANG Dun-qiu^1,2,3,
XI Bei-dou⁴

1. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;
2. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China;
3. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China;
4. Chinese Research Academy of Environmental Sciences, Beijing 100012, China

摘要

摘要: 污泥处理后土地利用是氟喹诺酮类抗生素（fluoroquinolones，FQs）进入土壤环境的主要途径之一。好氧堆肥具有高效去除FQs、削减其环境风险的潜力，但目前对于堆肥过程中各阶段物料FQs去除影响因素的研究仍较少。该研究在制备典型城市污泥好氧堆肥获取其中温期、高温期物料的基础上，向堆肥中添加2种典型的FQs（ofloxacin，OFL；norfloxacin，NOR），在不同FQs初始浓度（0，2.5，5.0 mg/kg）、含水率（50%、60%、70%）和通风量（0，15 mL/min）条件下，进行56 d的抗生素去除试验，控制各堆肥物料在其对应堆肥阶段温度（中温期物料，35℃；高温期物料，55℃）。结果表明：2种物料中FQs去除率均随着初始浓度上升而逐步下降，中温期物料最佳初始FQs浓度分别为5.0 mg/kg（OFL）、2.5 mg/kg（NOR），对于高温期物料两者均为2.5 mg/kg；中温期物料中，FQs去除率随含水率增加先上升后下降，最佳含水率均为60%，高温期物料中，FQs去除率随含水率升高而逐步增加；2种物料中，通风量15 mL/min下的FQs去除率均明显高于未通风处理。与中温期物料对比，高温期物料中FQs去除过程需要较低的初始浓度和较高的含水率；在2种物料中，充分通风下FQs的去除率均明显高于未通风处理。
- 污泥 /
- 堆肥 /
- 抗生素 /
- 生物降解
Abstract: Land application after being composted is one of the main streams for the input of fluoroquinolone antibiotics into the soil environment. Aerobic composting can effectively remove FQs and reduce the potential environmental risk. However, only few studies have been reported to discuss the factors affecting the removal kinetics of FQs in sewage compost, during different composting phases. In this study, two groups of 56-day incubation were carried out in 0.5 L bioreactors by adding FQs into the compost collected from the mesophilic-phase and thermophilic-phase matrix during aerobic composting of sewage sludge without FQs added. These incubation trials in each group were performed at the different conditions varying at initial FQs content (0, 2.5, 5.0 mg/kg), water contents (50%, 60%, 70%) and aeration rates (0, 15 mL/min), while the temperatures of two-groups treatments were controlled at those corresponding composting phases (mesophilic, 35℃; thermophilic, 55℃). The removal rates of the FQs in the two groups gradually declined when the initial concentration rose, and the optimal initial FQs concentrations for the mesophilic-phase compos were 5.0 mg/kg (OFL) and 2.5 mg/kg (NOR), while 2.5 mg/kg(OFL) for both mesophilic-phase and thermophilic-phase. In the mesophilic-phase compost, the removal rate of FQs increased firstly and then decreased with increasing the water content of the compost from 50% to 70%, and the optimum water content were 60%, while the removal efficiencies of FQs of the thermophilic-phase compost gradually increased with increasing of the water content. In all composts, the ventilation was more conducive to rapidly remove the FQs in sludge compost than no ventilation. Compared with the mesophilic-phase compost, removing FQs in the thermophilic-phase compost needed a lower initial FQs concentration and a higher water content, while in both composts the sufficient ventilation resulting into aerobic environment, more conducive for removal of FQs than no ventilation.
- sludge /
- composting /
- antibiotic /
- biodegradation

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