State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China; College of Geology and Environment, Xi'an University of Science and Technology, Xi'An 710054, PR China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China; Beijing Enterprises Water Group (China) Investment Limited, Beijing 100102, PR China.
Bioresour Technol. 2021 Mar;324:124675. doi: 10.1016/j.biortech.2021.124675. Epub 2021 Jan 7.
This study aims to develop a novel technology for actual municipal wastewater treatment to achieve rapid sludge sedimentation and high pollutants removal efficiency. The SBRs were modified and operated with periodic addition of 20 μL·L nanofloc®. Results revealed that NH-N and chemical oxygen demand (COD) was efficiently removed in both laboratory- and pilot-scale SBRs, and the average removal efficiency of total nitrogen (TN) and total phosphorus (TP) was as high as 72.43 ± 2.66% and 98.63 ± 0.74%, respectively, with hydraulic retention time (HRT) of 8 h. Besides, the sludge volume index at 30 min (SVI) was only 40.06 ± 1.99 mL·g, comparable with aerobic granular sludge (AGS). This novel technology could be proposed as a competitive method to upgrade, reconstruct and delay the expansion of municipal wastewater treatment plants (WWTPs) due to its rapid sludge sedimentation and efficient pollutants removal with low HRT.
本研究旨在开发一种用于实际城市污水处理的新技术，以实现快速污泥沉降和高污染物去除效率。采用周期性添加 20μL·L 纳米絮体®的方式对 SBR 进行了改良和运行。结果表明，实验室和中试规模的 SBR 中均能有效去除 NH-N 和化学需氧量（COD），总氮（TN）和总磷（TP）的平均去除效率分别高达 72.43±2.66%和 98.63±0.74%，水力停留时间（HRT）为 8 小时。此外，污泥体积指数（SVI）在 30 分钟时仅为 40.06±1.99mL·g，与好氧颗粒污泥（AGS）相当。由于该技术具有快速污泥沉降和高效污染物去除的特点，且 HRT 较低，因此可以作为升级、改造和延缓城市污水处理厂（WWTP）扩建的一种有竞争力的方法。
