Wang Jing-feng, Wang Xuan, Ji Min, Lu Shan, Liu Wei-hua, Yang Zao-yan
Institute of Hygiene and Environmental Medicine, Academy of Military Medical Sciences, Tianjin 300050, China.
Huan Jing Ke Xue. 2007 May;28(5):1033-8.
Granular sludge membrane bioreactor (GMBR), operated with alternating anaerobic-aerobic mode, showed good organics removal and simultaneous nitrification and denitrification (SND) performances during 120 days operation. Moreover, sludge size distribution examination showed that the increase of sludge concentration in GMBR was mostly due to the increase of small granular sludge with diameter between 0.18 - 0.45 mm and flocculent sludge smaller than 0.18 mm, and most of granular sludge larger than 0.45 mm was stably existed in GMBR, at the end of operation granular sludge with diameter larger than 0.18mm remained 60%-65% in GMBR. Sludge surface negative charge increased with the sludge size distribution variation, and surface charge remained -0.42 - -0.80 meq x g(-1) after 80 days operation. The increase of sludge surface negative charge was mostly caused by sludge smaller than 0.45 mm, thereinto sludge smaller than 0.18 mm had the greatest effect. Moreover, results revealed that the sludge surface negative charge decreased as the sludge size increased, and a linear correlation can be obtained between sludge surface negative charge and sludge size. Sludge in GMBR had good settleability, and SVI was about 60-90 mL/g. Furthermore results showed that sludge surface charge was correlated with SVI, sludge SVI increased with surface negative charge increased.
颗粒污泥膜生物反应器（GMBR）采用厌氧-好氧交替运行模式，在120天的运行过程中表现出良好的有机物去除效果以及同步硝化反硝化（SND）性能。此外，污泥粒径分布检测表明，GMBR中污泥浓度的增加主要归因于直径在0.18 - 0.45 mm之间的小颗粒污泥以及小于0.18 mm的絮状污泥的增加，并且大部分大于0.45 mm的颗粒污泥在GMBR中稳定存在，运行结束时，GMBR中直径大于0.18mm的颗粒污泥占比仍为60%-65%。污泥表面负电荷随污泥粒径分布变化而增加，运行80天后表面电荷保持在-0.42 - -0.80 meq x g(-1)。污泥表面负电荷的增加主要由小于0.45 mm的污泥引起，其中小于0.18 mm的污泥影响最大。此外，结果表明污泥表面负电荷随污泥粒径增大而降低，且污泥表面负电荷与污泥粒径之间存在线性关系。GMBR中的污泥沉降性能良好，污泥体积指数（SVI）约为60-90 mL/g。此外，结果表明污泥表面电荷与SVI相关，污泥SVI随表面负电荷增加而增大。
