一种新型颗粒污泥——无机核颗粒污泥的形成和机理探讨  

A new discovery of anaerobic sludge granular with big aera minerals core

作　　者：江瀚[1] 王凯军[2] 石宪奎[1] 陈淑祥[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京环境保护科学研究院,北京100037

出　　处：《微生物学报》2005年第6期925-929,共5页Acta Microbiologica Sinica

基　　金：国家"863计划"(2002AA601190)~~

摘　　要：在人工配水以葡萄糖为主要基质长期运行的EGSB反应器中,发现了一种具有特殊结构的新型厌氧颗粒污泥———无机核颗粒污泥。扫描电镜观察,其内部形成较大直径、带有清晰微生物自溶痕迹、均匀分布的无机质核心,外层则为紧密的微生物所包裹。通过能谱、X射线衍射分析,确定内核无机质为Ca5(PO4·CO3)3(OH)(碳磷灰石)。根据结构特征,提出了无机核颗粒污泥的生长过程模型。进一步分析认为EGSB反应器的宏观pH值环境和颗粒污泥微观pH值环境是形成颗粒污泥无机核的原因。A anaerobic sludge granular containing mineral core with a diameter of 1mm was discovered in lab scale expanded granular sludge bed（EGSB） reactor operated only with glucose as substrate. By SEM, the granular was a core packed by compact bacterium, in which minerals distribute equally and there are caves caused by biological selfdegradation. By energy spectrum and X-ray, the core is composed of Ca5 （PO4· CO3）3 （OH）. On the basis of its construction characteristics, the developing mechanism was investigated as well as the developing model of the sludge granular was present, the results shown that the contributing factors influencing mineral core formation are external and internal pH value of sludge granular.

关 键 词：颗粒污泥 无机核 元素成分 Ca5(PO4·CO3)3(OH) 生物成因 

分 类 号：X703[环境科学与工程—环境工程]