水力条件对CANON工艺颗粒污泥特性的影响研究  

Study on the Influence of Hydraulic Conditions on the Characteristics of Granular Sludge in CANON Process

作　　者：漆磊[1] QI Lei(CHINA Railway Siyuan Survey&Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《四川环境》2023年第5期25-30,共6页Sichuan Environment

摘　　要：为实现自养生物脱氮,采用膨胀颗粒污泥床小试反应器(R1~R3)培养全程自养脱氮工艺(Completely Autotrophic Nitrogen Removal Over Nitrite, CANON)颗粒污泥,考察了不同上升流速、水力剪切力和溶解氧浓度下CANON颗粒污泥浓度和粒径的变化规律。结果表明:系统稳定后,污泥浓度呈现出R2>R1>R3,R1、R2成功实现CANON颗粒污泥启动,并且实现了颗粒化,而R3中较高的上升流速、水力剪切力导致系统内污泥易碎裂从而洗出系统,导致R3未能启动成功。In order to achieve autotrophic biological nitrogen removal over Nitrite,the expanded granular sludge bed small test reactor(R1~R3)was used to cultivate CANON granular sludge.The variation of the concentration and particle size of CANON granular sludge under different rising velocity,hydraulic shear force and dissolved oxygen concentration were investigated.The results showed that after system was stabilized,the sludge concentration showed R2>R1>R3.R1 and R2 have successfully started CANON granular sludge and achieved granulation,while the high upward-flow velocity and hydraulic shear force in R3 caused the sludge in the system to break easily and washed out of the system,resulting in the failure of R3 to start successfully.

关 键 词：CANON工艺 颗粒污泥 剪切力 污泥浓度 污泥粒径 

分 类 号：X703[环境科学与工程—环境工程]