改性沸石固定微藻用于鱼塘养殖尾水脱氮  

Modified Zeolite-immobilized Microalgae for Nitrogen Removal from Fishpond Wastewater

作　　者：王雪健 王艳 吉世明 朱斌 闫志成 万金泉 WANG Xue-jian;WANG Yan;JI Shi-ming;ZHU Bin;YAN Zhi-cheng;WAN Jin-quan(College of Environment and Energy,South China University of Technology,Guangzhou 510006,China;Guangdong Shunkong Zihua Technology Co.Ltd.,Foshan 528300,China)

机构地区：[1]华南理工大学环境与能源学院,广东广州510006 [2]广东顺控自华科技有限公司,广东佛山528300

出　　处：《中国给水排水》2025年第7期95-101,共7页China Water & Wastewater

基　　金：广东省佛山市科技创新项目(2130218003140)。

摘　　要：为解决低C/N鱼塘养殖尾水难以高效脱氮的问题,制备了壳聚糖-Na型双改性多孔活化沸石(Na-Zeo@CS)作为小球藻固定材料,比较天然斜发沸石、壳聚糖和Na-Zeo@CS对小球藻的吸附沉降效率,并在此基础上对负载小球藻的Na-Zeo@CS降解含氮污染物的效果进行研究。结果表明,制备的Na-Zeo@CS在投加量为4.0 g/L、水体pH为5~7、藻初始密度为0.2~0.6 g/L的条件下具有较好的藻细胞吸附沉降效果。负载小球藻的Na-Zeo@CS在72 h后对水中NH_(4)^(+)-N和NO_(3)^(-)-N的去除率分别为83.81%和45.02%,小球藻通过解附Na-Zeo@CS吸附的NH_(4)^(+)-N完成生物再生,经再生后的Na-Zeo@CS对NH_(4)^(+)-N的吸附容量最高可达再生前的86.45%。采用扫描电子显微镜(SEM)对产物进行表征,观察到Na-Zeo@CS表面附着了大量小球藻,分析认为Na-Zeo@CS通过静电吸引和网捕絮凝作用吸附小球藻,降低了藻细胞表面的电荷,使其脱稳沉降。To address the challenge of efficiently removing nitrogen from fishpond wastewater with a low carbon to nitrogen(C/N)ratio,chitosan-Na type double modified porous activated zeolite(Na-Zeo@CS)was prepared as an attached growth material for Chlorella.The adsorption and sedimentation efficiencies of natural clinoptilolite,chitosan,and Na-Zeo@CS on Chlorella were compared.Additionally,the performance of Na-Zeo@CS loaded with Chlorella in degrading nitrogen-containing pollutants was investigated.The prepared Na-Zeo@CS demonstrated excellent adsorption and sedimentation performance for algal cells when the dosage was 4.0 g/L,the pH range was 5 to 7,and the initial algal density was between 0.2 g/L and 0.6 g/L.After 72 hours,the removal efficiencies of NH_(4)^(+)-N and NO_(3)^(-)-N by Na-Zeo@CS loaded with Chlorella were 83.81%and 45.02%,respectively.Chlorella facilitated biological regeneration through the desorption of NH_(4)^(+)-N from [e-mail] adsorption capacity of the regenerated Na-Zeo@CS for NH_(4)^(+)-N was restored to 86.45%of its original capacity prior to regeneration.The products were characterized using scanning electron microscopy(SEM).Observations revealed a significant number of Chlorella adhered to the surface of [e-mail] indicated that the adsorption mechanism involved electrostatic attraction and net flocculation,which reduced the surface charge of the algal cells,leading to destabilization and subsequent settling.

关 键 词：鱼塘养殖尾水 低C/N 生物沸石 壳聚糖 小球藻 脱氮 

分 类 号：TU992[建筑科学—市政工程]