Institute of Environmental Science and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan.
Bioresour Technol. 2011 May;102(9):5331-6. doi: 10.1016/j.biortech.2010.09.100. Epub 2010 Oct 1.
The performance of laboratory-scale attached growth (AG) and suspended growth (SG) membrane bioreactors (MBRs) was evaluated in treating synthetic wastewater simulating high strength domestic wastewater. This study investigated the influence of sponge suspended carriers in AG-MBR system, occupying 15% reactor volume, on the removal of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP), and compared it to that of SG-MBR. Results showed that the removal efficiencies of COD, TN and TP in AG-MBR were 98%, 89% and 58%, respectively as compared to 98%, 74% and 38%, respectively in SG-MBR. Improved TN removal in AG-MBR systems was primarily based on simultaneous nitrification and denitrification (SND) process. These results infer that the presence of small bio-particles having higher microbial activity and the growth of complex biomass captured within the suspended sponge carriers resulted in improved TN and TP removal in AG-MBR.
采用实验室规模的附着生长（AG）和悬浮生长（SG）膜生物反应器（MBR）处理模拟高浓度生活污水的合成废水，评估其性能。本研究考察了在 AG-MBR 系统中填充占反应器体积 15%的海绵悬浮载体对去除化学需氧量（COD）、总氮（TN）和总磷（TP）的影响，并与 SG-MBR 进行了比较。结果表明，AG-MBR 对 COD、TN 和 TP 的去除率分别为 98%、89%和 58%，而 SG-MBR 对 COD、TN 和 TP 的去除率分别为 98%、74%和 38%。AG-MBR 系统中 TN 去除率的提高主要基于同步硝化反硝化（SND）过程。这些结果表明，由于存在具有更高微生物活性的小生物颗粒和在悬浮海绵载体内捕获的复杂生物量的生长，AG-MBR 中 TN 和 TP 的去除得到了改善。
