【摘要】 为解决厌氧氨氧化系统受温度影响大的问题,建立絮状-颗粒耦合污泥的厌氧氨氧化系统(SBR1)和单一颗粒污泥厌氧氨氧化系统(SBR2)。探讨瞬时降温模式(35℃直接降至15℃)和梯度降温模式(35℃逐步降至30、25、20、15℃)对两系统脱氮性能的影响,并对比两系统的稳定性以及恢复性能。结果表明,低温会削弱甚至抑制厌氧氨氧化系统的脱氮效能,两种降温模式下,SBR2对温度的变化更为敏感,升温后系统恢复时间也更长,这与SBR1中有絮状污泥包裹在颗粒污泥外部,可以减缓降温对厌氧氨氧化颗粒污泥的冲击有关;相比于梯度降温模式,瞬时降温对SBR1、SBR2脱氮性能影响更小,系统恢复时间更短,这是因为梯度降温模式延长了反应器的低温运行时间,使系统微生物活性降低,系统恢复所需的时间也就更长。更多还原

【Abstract】 In order to solve the problem that the anaerobic ammonium oxidation system could be greatly affected by temperature,a flocculent-particle coupled sludge anaerobic ammonium oxidation system(SBR1)and a single granular anaerobic ammonium oxidation system(SBR2)were established.The effects of instantaneous cooling(from35℃to 15 ℃)and gradient cooling(gradually cooling from 35 ℃ to 30,25,20,15 ℃)on the nitrogen removal performance of the two systems were investigated,and the stability and recovery of the two systems were compared.The results showed that low temperatures could weaken or even inhibit the denitrification efficiency of the anammox system.In both cooling modes,SBR2 was more sensitive to temperature changes,and the system recovery time was longer after heating.This was related to the fact that the flocculent sludge in SBR1 was wrapped outside the granular sludge,which could slow down the impact of cooling on the anaerobic ammonia oxidation granular sludge;compared with the gradient cooling mode,the instantaneous cooling had less influence on the denitrification performance of SBR1 and SBR2,and the system recovery time was shorter.This was because the gradient cooling mode prolongs the low temperature operation time of the reactor,reduces the microbial activity of the system,and took long time to recover the system.更多还原