Cheng Wenjing, Zhang Liguo, Xu Wenjie, Sun Yichen, Wan Junfeng, Li Haisong, Wang Yan
School of Ecology and Environment, Zhengzhou University, Zhengzhou, 100 Science Avenue, 450001, China E-mail:
Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.
Water Sci Technol. 2020 Jul;82(2):364-372. doi: 10.2166/wst.2020.278.
Aerobic granular sludge process as a promising biotechnology has been one of the research hotspots in the area of wastewater treatment during the last two decades. In our study, after around 60 days' operation, filamentous granular sludge (FGS) was formed under low aeration (SAV = 0.085 cm/s) and multi-feeding conditions. The characteristics of FGS and the performance of the FGS system for organic matter and nutrients removal were investigated. The results showed that chemical oxygen demand (COD) and total organic carbon (TOC) removal efficiencies were relatively stable, while COD removal efficiency increased from 82% to 94% in the presence of sulfamethoxazole (SMZ) at low concentration (1 mg/L). At the same time, the TP removal efficiency could be improved and maintained at around 75%, while TN removal efficiency was flocculated at around 50%. The analysis of microbial diversity showed that Thiothrix and Trichococcus as typical filamentous species were detected and dominant in the FGS system. The abundance of Thiothrix increased from 15% to 34%, while Trichococcus decreased from 23% to 3% in the presence of SMZ.
好氧颗粒污泥工艺作为一种有前景的生物技术，在过去二十年中一直是废水处理领域的研究热点之一。在我们的研究中，经过约60天的运行，在低曝气（SAV = 0.085 cm/s）和多进料条件下形成了丝状颗粒污泥（FGS）。研究了FGS的特性以及FGS系统去除有机物和营养物的性能。结果表明，化学需氧量（COD）和总有机碳（TOC）的去除效率相对稳定，而在低浓度（1 mg/L）磺胺甲恶唑（SMZ）存在下，COD去除效率从82%提高到94%。同时，总磷（TP）去除效率可提高并维持在75%左右，而总氮（TN）去除效率在50%左右波动。微生物多样性分析表明，在FGS系统中检测到典型丝状菌硫丝菌属和动球菌属，且它们占主导地位。在SMZ存在下，硫丝菌属的丰度从15%增加到34%，而动球菌属从23%下降到3%。
