磺胺甲噁唑与砷复合污染对活性污泥系统的影响  

Effects of combined pollution of sulfamethoxazole and arsenic on activated sludge system

作　　者：康鹏飞 荣步云 李红丽 崔理慧[2,4] 万俊锋 KANG Pengfei;RONG Buyun;LI Hongli;CUI Lihui;WAN Junfeng(School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan International Joint Laboratory of Environment and Resources,Zhengzhou 450001,China;Shanxi Tianji Coal Chemical Industry Group Co.,Ltd.,Changzhi 047507,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学化工学院,河南郑州450001 [2]河南省环境与资源国际联合实验室,河南郑州450001 [3]山西天脊煤化工集团股份有限公司,山西长治047507 [4]郑州大学生态与环境学院,河南郑州450001

出　　处：《工业水处理》2022年第7期67-74,共8页Industrial Water Treatment

基　　金：国家自然科学基金项目(21107100);河南省科技攻关项目(212102110030)。

摘　　要：抗生素及其抗性基因在环境中的迁移转化是近年来环境领域的研究热点之一。以SBR工艺为代表的活性污泥法在治理含有抗生素的废水中得到了广泛的应用,但是关于抗生素和重金属复合污染物对SBR工艺影响的报道较少。采用2组平行SBR反应器,分别单独投加磺胺甲噁唑(SMX)(对照组)和复合投加SMX与三价砷As(Ⅲ)连续运行90 d,重点研究复合污染对SBR系统性能的影响。结果表明,短期运行条件下SMX与As(Ⅲ)复合污染显著(p<0.01)抑制微生物活性从而导致SBR系统中COD、TN和TP去除性能恶化,长期运行过程中,SMX与As(Ⅲ)复合污染促使单位MLSS中的胞外聚合物(EPS)从11.95 mg/g提升至48.63 mg/g,同时污泥容积指数SVI_(5)从92.21 mL/g降至65.14 mL/g,沉降性能大大提高。动力学实验证实活性污泥主要通过吸附作用去除SMX,吸附规律符合Langmuir方程,说明活性污泥对SMX的吸附行为更趋近于单层吸附。这项研究表明以SMX与As(Ⅲ)为代表的抗生素与重金属的复合污染对SBR系统的影响不可忽视,同时本研究对抗生素废水的治理也有一定的借鉴意义。The migration and transformation of antibiotics and their antibiotic resistance genes(ARGs)in the envi⁃ronment is one of the research hotspots in the field of environment in recent years.As one of typical activated sludge process,the SBR process has been widely applied in the treatment of antibiotic polluted wastewater.However,there are few reports on the impact of complex coexisting pollutants including antibiotics and heavy metal on the SBR pro⁃cess.In this study,two groups of parallel SBR reactors,which were added sulfamethoxazole(SMX)(control group)and“SMX+AS(Ⅲ)”respectively,were operated continuously for 90 days to mainly investigate the effect of com⁃plex coexisting pollutants on the performance of SBR system.The results showed that the coexisting pollutants“SMX+As(Ⅲ)”significantly(p<0.01)inhibited the activity of microorganisms under short-term operating condi⁃tions,resulting in the deterioration of the removal performance of COD,TN and TP in the SBR system.During the long-term operation,the combined pollution of SMX and As(Ⅲ)promoted the content of extracellular polymer(EPS)per unit MLSS to increase from 11.95 mg/g to 48.63 mg/g,while the sludge volume index SVI_(5) decreased from 92.21 mL/g to 65.14 mL/g,and the settling performance was greatly improved.Kinetic experiments confirmed that adsorption was the main mechanism to remove SMX by activated sludge,which was fitted well with the Lang⁃muir equation,indicating that the adsorption behavior probably belonged to monolayer adsorption.This study showed that the combined pollution of antibiotics and heavy metals represented by SMX and As(Ⅲ)couldn’t be ig⁃nored in the SBR system,and it also had certain reference significance for the treatment of antibiotic wastewater.

关 键 词：磺胺甲噁唑 As(Ⅲ) 活性污泥 吸附 抗生素废水 

分 类 号：X703.1[环境科学与工程—环境工程]