自养与异养颗粒污泥的特性比较  

Comparison of Characteristics between Autotrophic and Heterotrophic Granular Sludge

作　　者：李志华[1] 吴杰 张婷[1] 王晓昌[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]长沙艾佩克工程有限公司,湖南长沙410014

出　　处：《中国给水排水》2010年第21期25-29,共5页China Water & Wastewater

基　　金：高等学校博士学科点专项科研基金资助项目(200807030001);陕西高校省级重点实验室科研计划项目(09JS027);国家自然科学基金资助项目(50708089)

摘　　要：采用两个几何形状相同的SBR反应器(R1和R2),控制其负荷分别为2.4、0 kg-COD/(m3.d),以分别培养异养和自养好氧颗粒污泥并分析其特性。结果表明:R1的好氧颗粒污泥中存在大量丝状菌,以异养菌为主,而在R2中自养硝化菌为优势种群。颗粒强度测试结果表明,以丝状菌为骨架的异养颗粒污泥的强度要大于自养颗粒污泥的。R1、R2对NH+4-N的平均去除率分别为92%和87%。然而,异养颗粒污泥氧化氨氮的能力却弱于自养颗粒污泥,两者分别为108.2和579.7 mg/(gMLVSS.d)。另外计算表明,在R1的异养颗粒污泥中自养菌与异养菌的数量之比约为1∶8。Autotrophic and heterotrophic aerobic granular sludge were cultivated using two geomet- rically identical sequencing batch reactors （SBRs） , namely R1 and R2 with organic loading rate of 2.4 and 0 kgCOD/（ m3 · d） , and their characteristics were analyzed. The results show that a large number of filamentous bacteria exist in the aerobic granular sludge and are dominated by heterotrophie bacteria in R1 while autotrophie nitrifying bacteria are predominant in R2. The intensity of heterotrophic granular sludge with filamentous bacteria as skeleton is stronger than that of autotrophic granular sludge. The average removal rates of NH4^＋ - N in R1 and R2 are 92% and 87% respectively. However, the oxidation rate of NH4 -N by heterotrophic granular sludge is lower than that by autotrophic granular sludge, being 108.2 mg/（ gMLVSS ·d） and 579.7 mg/（ gMLVSS · d） respectively. The ratio of autotrophic to hetero- trophic bacteria in heterotrophic granular sludge in R1 is 1 ： 8, which is the main reason for low oxidation rate of NH4 ^＋- N.

关 键 词：好氧颗粒污泥 异养菌 自养硝化菌 颗粒强度 

分 类 号：X703[环境科学与工程—环境工程]