Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
Chemosphere. 2015 Dec;140:106-13. doi: 10.1016/j.chemosphere.2014.08.059. Epub 2014 Oct 11.
A submerged anaerobic ammonium oxidizing (Anammox) membrane bioreactor with recycling biogas sparging for alleviating membrane fouling has been successfully operated for 100d. Based on the batch tests, a recycling biogas sparging rate at 0.2m(3)h(-1) was fixed as an ultimate value for the sustainable operation. The mixed liquor volatile suspended solid (VSS) of the inoculum for the long operation was around 3000mgL(-1). With recycling biogas sparging rate increasing stepwise from 0 to 0.2m(3)h(-1), the reactor reached an influent total nitrogen (TN) up to 1.7gL(-1), a stable TN removal efficiency of 83% and a maximum specific Anammox activity (SAA) of 0.56kg TNkg(-1) VSSd(-1). With recycling biogas sparging rate at 0.2 m(3) h(-1) (corresponding to an aeration intensity of 118m(3)m(-2)h(-1)), the membrane operation circle could prolong by around 20 times compared to that without gas sparging. Furthermore, mechanism of membrane fouling was proposed. And with recycling biogas sparging, the VSS and EPS content increasing rate in cake layer were far less than the ones without biogas sparging. The TN removal performance and sustainable membrane operation of this system showed the appealing potential of the submerged Anammox MBR with recycling biogas sparging in treating high-strength nitrogen-containing wastewaters.
采用带有沼气回流的淹没式厌氧氨氧化（Anammox）膜生物反应器可以缓解膜污染，该工艺已经成功运行了 100 天。基于批量测试，将 0.2m³h⁻¹的沼气回流速率确定为可持续运行的最终值。长期运行中接种物的混合液挥发性悬浮固体（VSS）约为 3000mgL⁻¹。随着沼气回流速率从 0 逐渐增加到 0.2m³h⁻¹，反应器达到了 1.7gL⁻¹的进水总氮（TN），稳定的 TN 去除效率为 83%，最大比厌氧氨氧化活性（SAA）为 0.56kgTNkg⁻¹VSSd⁻¹。在 0.2m³h⁻¹的沼气回流速率（相当于 118m³m⁻²h⁻¹的曝气强度）下，与没有气体曝气相比，膜的运行周期延长了约 20 倍。此外，还提出了膜污染的机理。并且通过沼气回流，在饼层中 VSS 和 EPS 含量的增加速率远低于没有沼气回流的情况。该系统的 TN 去除性能和可持续的膜运行表明，带有沼气回流的淹没式 Anammox MBR 具有处理高强度含氮废水的诱人潜力。
