生物过滤型厌氧氨氧化系统的启动、抑制及恢复研究

Study on the Start-Up and Recovery Performance of an ANAMMOX Filtering Reactor after Substrate Inhibition

研究装载页岩陶粒的升流式厌氧污泥床(UASB)厌氧氨氧化系统的启动特征,考察系统耐基质抑制能力,探讨抑制后系统的恢复策略和恢复能力。研究表明:装载填料的厌氧氨氧化系统可以在116d成功启动,容积基质氮去除速率(NRR)高于0.5kgN·m^(-3)·d^(-1).本研究构建的系统具有较强的耐游离氨(FA)和游离亚硝酸(FNA)浓度能力。系统失稳后,降低进水基质浓度可降低FA和FNA的浓度,从而使反应器得到有效恢复,且维持较长的水力停留时间(HRT)更有利于反应器的恢复,但失稳后的厌氧氨氧化系统对于FA和FNA的耐受能力明显降低。

The quick start-up and recovery performance of an anaerobic ammonia oxidation（ANAMMOX）filtering reactor after substrate inhibition was studied by using an upflow anaerobic sludge bed（UASB）loaded with shale ceramsite.The results indicate that the ANAMMOX reactor could be set up at the 116 th day,and the volume substrate nitrogen removal rate（NRR）was above 0.5 kgN·m^-3·d^-1.During whole operation,the ANAMMOX filtering reactor exhibited higher tolerance for free ammonia（FA）and free nitrous acid（FNA）than granular sludge ANAMMOX reactor.The decrease in FA and FNA by decreasing influent substrate concentration could efficiently recover purification performance,and longer hydraulic retention time（HRT）was beneficial to this recovery.However,the tolerance ability of ANAMMOX bacteria against FA and FNA was decreased after inhibition.