蛋壳微载体对硝化颗粒污泥快速培养的影响  

Effects of eggshell microcarriers on the rapid cultivation of nitrifying granular sludge

作　　者：蒋宽胜 汤皓婷 隆静 李明骏 张良伟 周含 赵薇 刘文如 JIANG Kuan-sheng;TANG Hao-ting;LONG Jing;LI Ming-jun;ZHANG Liang-wei;ZHOU Han;ZHAO Wei;LIU Wen-ru(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]城市生活污水资源化利用技术国家地方联合工程实验室,江苏苏州215009 [3]江苏省水处理技术与材料协同创新中心,江苏苏州215009

出　　处：《中国环境科学》2024年第10期5481-5489,共9页China Environmental Science

基　　金：国家自然科学基金资助项目(51808367);生物膜法水质净化及利用技术教育部工程研究中心开放基金资助项目(BWPU2021KF03)。

摘　　要：采用连续流气提内循环反应器,考察了投加蛋壳微载体对硝化颗粒污泥快速培养的影响特性.结果表明,投加0.5g/L蛋壳微载体(75μm)的反应器(R2)1个月内实现污泥颗粒化,比对照组(R1)提前1~2周,且R2所得颗粒污泥表现出更高的混合液挥发性悬浮固体浓度(MLVSS)(R1=1.7g/L、R2=2.2g/L)、紧密结合型胞外聚合物(TB-EPS)含量(R1=97.65mg/gVSS、R2=136.29mg/gVSS)及TB-PN/PS比值(R1=2.95、R2=4.73),以及更好的沉降性能(R1、R2的SVI_(3)和SVI_(30)分别为41.67,37.5mL/g,30.36,28.57mL/g).与R1相比,R2中颗粒污泥具有更高活性,比耗氧速率(SOUR)和比氨氧化速率(SAOR)分别为754mgO_(2)/(gVSS·h)和90.74mg/(gVSS·h).高通量测序结果表明,投加蛋壳微载体的颗粒污泥中富集了更高丰度的硝化菌(Nitrosomonas)以及EPS产生菌(如Comamonadaceae__unclassified)等.The influence of adding eggshell microcarriers on the rapid cultivation of nitrifying granular sludge was investigated in a continuous flow gas-lift internal circulation reactor.The results showed that the reactor(R2)with the addition of 0.5g/L eggshell microcarriers(75μm)achieved sludge granulation within one month,which was 1~2weeks earlier compared to the control(R1).Furthermore,the resulting granular sludge in R2 exhibited higher mixed liquor volatile suspended solids(MLVSS)(R1=1.7g/L,R2=2.2g/L),Tightly Bound-EPS(TB-EPS)content(R1=97.65mg/gVSS,R2=136.29mg/gVSS),TB-PN/PS ratio(R1=2.95,R2=4.73),and better settling performance(with respective SVI_(3)and SVI_(30)values of 41.67,37.5mL/g for R1,and 30.36,28.57mL/g for R2).Compared to R1,the granular sludge in R2had higher activity,with specific oxygen uptake rate(SOUR)and specific ammonia oxidation rate(SAOR)values of 754mgO_(2)/(gVSS·h)and 90.74mg/(gVSS·h),respectively.High-throughput sequencing results indicated that the granular sludge supplemented with eggshell microcarriers had a higher abundance of nitrifying bacteria(Nitrosomonas)and EPS-producing bacteria(such as Comamonadaceae__unclassified).

关 键 词：硝化颗粒污泥 蛋壳微载体 快速培养 

分 类 号：X703[环境科学与工程—环境工程]