College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
Bioresour Technol. 2017 Nov;243:738-746. doi: 10.1016/j.biortech.2017.07.002. Epub 2017 Jul 4.
In this study, a laboratory-scale two-stage anoxic/oxic (A/O) combined membrane bioreactor (MBR) was operated for 113d for the treatment of landfill leachate. The average removal of chemical oxygen demand (COD), ammonia (NH-N) and total nitrogen (TN) achieved 80.60%, 99.04% and 74.87%, respectively. A mass balance evaluation suggested that the removal of COD, NH-N and TN occurred mainly in the second A/O process, and the total removal capacity of COD, NH-N and TN were 125.60g/d, 24.35g/d and 22.40g/d, respectively. High-throughput sequencing analysis indicated that the Proteobacteria (44.57-50.36%), Bacteroidetes (22.09-27.25%), Planctomycetes (6.94-8.47%), Firmicutes (3.31-4.53%) and Chloroflexi (3.13-4.80%) were the dominated phyla in the bacterial community during the operation period. At the genus level, Nitrosomonas, Nitrobacter, Planctomyces, Saprospiraceae and Pseudomonas showed relatively high abundance, which played an important role in the removal of pollutants.
在这项研究中，采用实验室规模的两级缺氧/好氧（A/O）组合膜生物反应器（MBR）处理垃圾渗滤液，连续运行 113 天。该系统对化学需氧量（COD）、氨氮（NH 4 -N）和总氮（TN）的平均去除率分别达到 80.60%、99.04%和 74.87%。质量平衡评估表明，COD、NH 4 -N 和 TN 的去除主要发生在第二级 A/O 工艺中，COD、NH 4 -N 和 TN 的总去除容量分别为 125.60g/d、24.35g/d 和 22.40g/d。高通量测序分析表明，在运行期间，细菌群落中的优势菌门主要为变形菌门（44.57-50.36%）、拟杆菌门（22.09-27.25%）、浮霉菌门（6.94-8.47%）、厚壁菌门（3.31-4.53%）和绿弯菌门（3.13-4.80%）。在属水平上，亚硝化单胞菌、硝化杆菌、浮霉状菌、Saprospiraceae 和假单胞菌的丰度相对较高，它们在污染物的去除中发挥了重要作用。
