磺胺二甲嘧啶抑制低C/N废水生物除磷效能的机制探究  

Mechanism of Sulfonamide Dimethoxazole Inhibiting the Efficiency of Biological Phosphorus Removal in Low C/N Wastewater

作　　者：邢晓轲[1] 邢鹏[1] 谷俊华[1] XING Xiaoke;XING Peng;GU Junhua(Xuchang Vocational and Technical College,Xuchang 461000,China)

机构地区：[1]许昌职业技术学院,河南许昌461000

出　　处：《水处理技术》2024年第9期45-50,共6页Technology of Water Treatment

基　　金：河南省教育科学规划项目(2022YB0724)。

摘　　要：磺胺二甲嘧啶(SMZ)是废水内高频检出的难降解光谱类抗生素,广泛存在的SMZ对污水生物处理过程构成严重威胁。强化生物除磷工艺是污水厂普遍采用的技术,而SMZ对EBPR的影响的报道至今匮乏。本论文在中温和低有机质进水条件下考察了SMZ含量对EBPR工艺的影响,并探究了SMZ去除效率、污染物及营养盐的周期性变化规律。最后,通过分析内聚物变化特征及微生物代谢规律揭示了高浓度SMZ抑制EBPR的作用机制。SMZ对EBPR的影响具有含量依赖性,低于1.0 mg/L SMZ未对EBPR产生显著影响,而高浓度SMZ抑制了EBPR对污染物和OP的去除。高浓度SMZ抑制了典型周期内COD的消耗、厌氧释磷及好氧吸磷。高浓度SMZ促进了胞外聚合物但降低了胞内聚合物PAH含量但促进了糖原质代谢。研究结果为EBPR处理含SMZ废水提供数据支撑。Sulfonamide dimethoxazole(SMZ)is a frequently detected,difficult-to-degrade broad-spectrum antibiotic in wastewater and poses a serious threat to the biological treatment processes in sewage plants.Enhanced biological phosphorus removal(EBPR)is a widely adopted technology in wastewater treatment plants,yet there is a lack of reports on the impact of SMZ on EBPR.This work examines the influence of SMZ concentration on the EBPR process under meOPhilic conditions and low organic loading,and explores the removal efficiency of SMZ,the periodic changes in pollutants and nutrients.Finally,the mechanism by which high concentrations of SMZ inhibit EBPR is revealed through the analysis of changes in intracellular polymers and microbial metabolic patterns.The impact of SMZ on EBPR is concentration-dependent;SMZ at concentrations below 1.0 mg/L did not significantly affect EBPR,while high SMZ concentration inhibited the removal of pollutants and soluble organic phosphorus(OP).High concentrations of SMZ inhibited the consumption of COD during the typical cycle,anaerobic phosphorus release,and aerobic phosphorus uptake.High concentrations of SMZ promoted the production of extracellular polymeric substances(EPS)but reduced the content of polyhydroxyalkanoates(PAH)within cells,while enhancing glycogen metabolism.The results provide data support for the treatment of wastewater containing SMZ by EBPR.

关 键 词：抗生素 EBPR 内聚物 厌氧释磷 

分 类 号：X703[环境科学与工程—环境工程]