Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One 06-08, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
HSR Hochschule für Technik Rapperswil, Institute of Environmental and Process Engineering (UMTEC), Oberseestrasse 10, 8640 Rapperswil, Switzerland.
Sci Total Environ. 2019 Dec 1;694:133719. doi: 10.1016/j.scitotenv.2019.133719. Epub 2019 Aug 5.
This study investigated the performances of gravity-driven membrane (GDM) reactors integrated with granule activated carbon (GAC) biofilm process for wastewater treatment under different intermittent aeration cycles (intensity and frequency). The results showed the removal efficiencies of dissolved organic carbon, total nitrogen, ammonia were significantly improved under intermittent aeration conditions (86-87%, ~29-37%, and ~83-99%, respectively) compared to non-aeration condition (72% and ~18%, and ~17%, respectively). In addition, it was found that the intermittent aeration significantly reduced the cake layer resistance and therefore improved ~130-300% the permeate flux compared to control without aeration. Microbial community analysis indicated that prokaryotic and eukaryotic compositions in the cake layer biofilm were significantly influenced by aeration condition. Lastly, energy consumption analysis revealed that GAC + GDM with shorter aeration period and low aeration intensity could be promising as a decentralized wastewater treatment process in terms of water quality and operating energy.
本研究考察了在不同间歇曝气周期（强度和频率）下，内置颗粒活性炭（GAC）生物膜工艺的重力驱动膜（GDM）反应器在废水处理方面的性能。结果表明，与非曝气条件相比（分别约为 72%和 18%，以及约 17%），间歇曝气条件下（分别约为 86-87%、29-37%和 83-99%），溶解有机碳、总氮和氨的去除效率显著提高。此外，研究发现，与无曝气的对照相比，间歇曝气显著降低了滤饼层阻力，因此渗透通量提高了约 130-300%。微生物群落分析表明，曝气条件显著影响了滤饼层生物膜中的原核生物和真核生物组成。最后，能量消耗分析表明，对于分散式污水处理而言，曝气周期较短、曝气强度较低的 GAC+GDM 有望成为一种有前途的工艺，在水质和运行能耗方面具有优势。
