降解五氯酚(PCP)的微氧颗粒污泥的形成机理  

The granulation mechanism of micro-aerobic granules for PCP degradation

作　　者：蓝惠霞[1] 邱献欢[1] 隋冰冰[1] 陈元彩[2] 

机构地区：[1]青岛科技大学环境与安全工程学院,青岛266042 [2]华南理工大学制浆造纸工程国家重点实验室,广州510640

出　　处：《环境科学学报》2009年第2期273-278,共6页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.20676045)~~

摘　　要：在微氧条件及剧毒性的五氯酚存在下,研究了活性污泥的颗粒化机理.在污泥培养过程中对污泥性质、外观进行观察,并利用扫描电镜对微生物相进行分析.结果表明,在颗粒化初始阶段诱导核的存在对絮体起着凝集作用,该阶段的微生物以丝状菌为主;在形成阶段,二价金属阳离子含量以及ECPs中PN/PS比值增加,丝状菌形成三维框架结构;而在颗粒污泥形成后的增长阶段,SVI值下降至较低的水平,形成表面光滑的完整颗粒,颗粒内杆菌、球菌占优势,含水率的明显下降表明质子跨膜迁移引起的细胞脱水作用变得显著.Micro-aerobic granules were subjected to a PCP environment to study their granulation mechanisms. The characteristics and appearance of the sludge were studied and the microorganisms were analyzed by scanning electron microscopy during culturing. The results showed that in the initial period, the induced cores functioned as floeculants and filamentous bacteria were the dominant microorganisms; before the formation of mature granules, both the amount of bivalent metal cations and the PN/PS ratio increased, and a three-dimensional frame structure was formed by the filamentous bacteria; after formation of mature granules, the SVI value decreased to a relatively low level and round mature granules with smooth surfaces were formed, in which bacilli and cocci were the dominant microorganisms. The marked reduction of moisture content in the granules indicated that the effect of cellular dehydration caused by proton transloeation was significant in granule growth.

关 键 词：五氯酚 微氧颗粒污泥 形成机理 

分 类 号：X703[环境科学与工程—环境工程]