磁黄铁矿石促进好氧颗粒污泥形成的效果与机制  

Effect and Mechanism of Pyrrhotite Promoting the Formation of Aerobic Granular Sludge

作　　者：朱文芳 叶磊 陈万年 宋亚丽 ZHU Wen‑fang;YE Lei;CHEN Wan‑nian;SONG Ya‑li(School of Civil Engineering and Architecture,Zhejiang University of Science and Technology,Hangzhou 310023,China;Zhejiang Province Key Laboratory of Recycling and Ecological Treatment of Waste Biomass,Zhejiang University of Science and Technology,Hangzhou 310023,China)

机构地区：[1]浙江科技大学土木与建筑工程学院,浙江杭州310023 [2]浙江科技大学浙江省废弃生物质循环利用与生态处理技术重点实验室,浙江杭州310023

出　　处：《中国给水排水》2024年第13期14-20,共7页China Water & Wastewater

基　　金：浙江省自然科学基金资助项目(LZY22B07002)。

摘　　要：为探究天然磁黄铁矿石对好氧颗粒污泥(AGS)处理染料废水过程中颗粒化进程的影响,在室温条件下运行4个序批式反应器(SBR),通过改变进水有机负荷和碳源,研究了颗粒化过程中AGS的SVI、粒径及Zeta电位的变化,并通过三维荧光光谱(3D-EEM)分析AGS成分以及磁黄铁矿石界面能变化来解析AGS的形成机制。结果表明,投加磁黄铁矿石约20 d就形成了AGS。高有机负荷及采用乙酸钠(NaAc)作为碳源时,SVI平均值由初始的105 mL/g下降到运行末期的(25.99±4.57) mL/g。3D-EEM分析显示,投加磁黄铁矿石能够增加污泥疏水性蛋白质的含量,促进AGS形成。颗粒化过程中,矿石液固界面黏附功逐渐降低,而界面能上升,也促进了AGS的形成。Four sequencing batch reactors(SBRs) were operated at room temperature so as to investigate the effect of natural pyrrhotite on the granulation process of aerobic granular sludge(AGS) in the treatment of dye wastewater.The changes in SVI,particle size,and Zeta potential of AGS during the granulation process were studied by changing the influent organic load and carbon source.The formation mechanism of AGS was analyzed by three-dimensional excitation emission matrix fluorescence spectrophotometer(3D-EEM)of AGS components and variation in the interface energy of pyrrhotite.The results showed that AGS were formed in about 20 days after adding pyrrhotite.When high organic loading rate and sodium acetate(NaAc) carbon source were used,the average SVI value decreased from 105 mL/g at initial operation to(25.99±4.57) mL/g at final run.3D-EEM analysis revealed that the addition of pyrrhotite could increase the conentration of sludge hydrophobic protein and promote the formation of AGS.In the process of granulation,the adhesion work of the pyrrhotite liquid-solid interface gradually decreased,while the interface energy increased,which also stimulated the formation of AGS.

关 键 词：好氧颗粒污泥 磁黄铁矿石 胞外聚合物 界面能 疏水性 

分 类 号：TU992[建筑科学—市政工程]