好氧颗粒污泥系统中丝状菌演替规律及其菌丝缠绕特性分析

为达到固液分离的目的,在SBR中将丝状菌颗粒化.研究发现,反应器中相继出现黄色、黑色和白色3种丝状菌颗粒.3种颗粒中,黑色颗粒和白色颗粒孔隙率基本一致,但黑色颗粒粒径远远大于其他2种颗粒,沉速达最大.对3种颗粒和反应器出水进行了丝状菌菌种鉴定,其中黑色颗粒以真菌为主,白色颗粒以微丝菌为主,黄色颗粒为浮球衣菌和Type0041,出水中除以上菌种外还有其他菌种,如Type0581.研究结果表明:丝状菌以弯曲、分支、不规则生长方式易形成丝状化颗粒;单一丝状菌相互缠绕形成的颗粒的强度高于多种丝状菌所形成的丝状菌颗粒.

Successive variations and entanglement characters of filamentous microorganisms in an aerobic granular sludge system

To improve the performance of solid/liquid separation,filamentous microorganisms were cultivated as granular structure in SBR. Three types of granules, i.e., yellow, black and white filamentous granules, could be successively observed in the reactor. The black and white granules had the same porosity; while the black granules were much bigger than the other two types of granules and thus exhibited the highest settling velocity. It was identified that fungi was predominated in the black granules, and M. parvicella in while ones, S. natans and Type0041 in the yellow ones, while in the effluent some other kinds of microorganisms could be observed such as Type0581. Results suggested that curved, branched and irregular growth could easily form granules, and entanglement of single species was much stronger than those by multi-species.