海藻酸钠凝胶储存好氧颗粒污泥及其活性恢复  

Storage of aerobic granular sludge by sodium alginate gel and its recovery analysis

作　　者：刘立凡[1] 刘前进 LIU Lifan;LIU Qianjin(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China;Shenzhen Water(Group)Co.Ltd.,Shenzhen 518000,China)

机构地区：[1]广东工业大学土木与交通工程学院,广州510006 [2]深圳市水务(集团)有限公司,深圳518000

出　　处：《环境工程学报》2022年第12期3956-3963,共8页Chinese Journal of Environmental Engineering

摘　　要：采用质量分数11.5%的海藻酸钠凝胶为载体,在4℃下避光储存好氧颗粒污泥(AGS)7个月,并将储存后的AGS进行活性恢复。分析了储存前后AGS理化特性变化以及储存后AGS恢复情况,以期为AGS储存和储存后AGS快速恢复方法的选择提供有价值的参考。结果表明:部分AGS在储存过程中发生解体,颗粒粒径变小,沉降速度、MLVSS/MLSS和脱氢酶活性(DHA)分别下降了43.93%、22.22%和43.34%,说明在4℃下使用海藻酸钠凝胶储存AGS具有可行性,该储存方法在一定程度上可维持AGS的结构完整性和微生物活性。经过9 d的再培养,AGS完全恢复到储存前水平。恢复后的AGS为黄褐色,表面光滑,整体呈球状或椭球状,颗粒粒径主要分布在1.3~2.5 mm,SVI30为31.9 mL·g^(-1),沉降速度为92.71 m·h^(-1),胞外聚合物(EPS)质量分数为75.05mg·g^(-1),DHA为86.21μg·(g·h)^(-1),表明恢复后的AGS沉降性能较好,微生物活性较高。恢复后的AGS对COD、NH_(4)^(+)-N、TN和TP的去除率分别为96.5%、97.8%、82.7%、73.5%,具有良好的除污效果。Aerobic Granular Sludge(AGS)was stored at 4℃in the dark for 7 months with 11.5%sodium alginate gel as carrier,and the activity of the stored AGS was recovered.The physical and chemical properties of AGS before and after storage as well as the recovery of AGS after storage were analyzed,in order to provide a valuable reference for the selection of AGS storage methods and rapid recovery of AGS after storage.The results showed that some AGS disintegrated during storage,their particle size became smaller,and the sedimentation velocity,MLVSS/MLSS and Dehydrogenase Activity(DHA)decreased by 43.93%,22.22%and 43.34%,respectively,indicating that it was feasible to use sodium alginate gel to store AGS at 4℃.The storage method could maintain the structural integrity and microbial activity of AGS to some extent.After 9 days of recultivation,the AGS recovered completely.The recovered AGS was yellowish brown with smooth surface and spherical or ellipsoid shape,the particle size was mainly distributed in 1.3-2.5 mm,the SVI30 was 31.9 mL·g^(-1),the sedimentation velocity was 92.71 m·h^(-1),the extracellular polymeric substance(EPS)concentration was 75.05 mg·g^(-1)and the DHA was 86.21μg·(g·h)^(-1),which indicated that the recovered AGS had a better settling performance and higher microbial activity.The recovered AGS had good removal effects of pollutants,and the removal rates of COD,NH_(4)^(+)-N TN and TP were 96.5%,97.8%,82.7%and 73.5%,respectively.

关 键 词：好氧颗粒污泥 海藻酸钠凝胶 储存 恢复 活性 

分 类 号：X703.1[环境科学与工程—环境工程]