East China Sea Environmental Monitoring Center, Shanghai 200137, PR China.
J Hazard Mater. 2011 Nov 15;195:318-23. doi: 10.1016/j.jhazmat.2011.08.045. Epub 2011 Aug 22.
An intermittently aerated moving bed membrane bioreactor (MBMBR) was developed and crucial parameters affecting nitrogen removal from wastewater by simultaneous nitrification and denitrification via nitrite were investigated, without strict control of solids retention time. Changes in the microbiological community and distribution in the reactor were monitored simultaneously. The intermittent-aeration strategy proved effective in achieving nitrition and the chemical oxygen demand (COD) to total nitrogen (TN) ratio was an important factor affecting TN removal. In the MBMBR, the nitrite accumulation rate reached 79.4% and TN removal efficiency averaged at 87.8% with aeration 2 min/mix 4 min and an influent COD/TN ratio of 5. Batch tests indicated that under the intermittently aerated mode, nitrite-oxidizing bacteria (NOB) were not completely washed out from the reactor but NOB activity was inhibited. The intermittently aerated mode had no effect on the activities of ammonia-oxidizing bacteria. Fluorescence in situ hybridizations (FISH) results also suggested that NOBs remained within the system.
开发了一种间歇曝气移动床膜生物反应器（MBMBR），并研究了在不严格控制固体停留时间的情况下，通过亚硝酸盐同时硝化反硝化从废水中去除氮的关键参数。同时监测了反应器中微生物群落的变化和分布。间歇曝气策略被证明可以有效地实现硝化，化学需氧量（COD）与总氮（TN）的比值是影响 TN 去除的一个重要因素。在 MBMBR 中，当曝气 2 分钟/混合 4 分钟且进水 COD/TN 比为 5 时，亚硝酸盐积累率达到 79.4%，TN 去除效率平均为 87.8%。批试验表明，在间歇曝气模式下，虽然反应器中没有完全洗出亚硝酸盐氧化菌（NOB），但 NOB 的活性受到了抑制。间歇曝气模式对氨氧化菌的活性没有影响。荧光原位杂交（FISH）结果也表明，NOB 仍存在于系统中。
