摘要
以Na Cl为示踪剂进行示踪脉冲响应试验,研究了同一水力停留时间(HRT)下泥水自循环反应器(AMTR)与AAO反应器水力特性的区别,以及泥水自循环反应器在不同HRT下的停留时间分布曲线和水力特性参数。试验结果表明:当HRT=9. 7 h时,AMTR比起AAO具有较强的水力混合程度以及较低的死区容积率;当HRT在9. 7～13. 75 h变化时,AMTR死区容积率Vd/V为0. 169～0. 124;随着HRT的增大,串联级数N由2. 87减小到2. 27,轴向扩散数D/UL由0. 223增大到0. 317,AMTR推流效果减小,混合程度增大,流态处在完全混合与平推流之间,具有较强的抗冲击负荷能力。此外,通过污泥接种培养,当AMTR稳定运行时,其处理城市生活污水效能较高,COD、TN、TP的去除率分别为85%、70%和85%。
The difference between alternate multi-tanks reactor and AAO on hydrodynamic characteristics in the same HRT was studied through the experiment of impulse response which used NaCl as tracer agent. In the same way, residence time distribution curves and hydrodynamic characteristics parameters of AMTR in several HRT were studied. The results showed that AMTR had stronger hydrodynamic mixing degree and lower dead-volume ratio than AAO in HRT = 9. 7 h. Dead-volume ratio of AMTR was between 0. 169 and 0. 124, when HRT varied from 9. 7 h to 13.75 h. Values of N decreased fronl 2. 87 to 2.27 and the number of D/UL increased from 0. 223 to 0. 317 with the increase of HRT. In this case, AMTR had poorer plug-flow and stronger mixed degreed, and flow pattern was just between plug-flow pattern and completely mixed pattern, which had stronger resistance to the impact. In addition, by culturing the sludge, efficiency of the treatment on sewage was high and removal rates of COD, TN and TP were 85%-70% and 85%, respectively, when AMTR ran steadily.
作者
陈思远
吕锡武
戴喆秦
许坤
Chen Siyuan;Lii Xiwu;Dai Zheqin;Xu Kun(School of Energy and Environment,Southeast University,Nanjing 210096,China;Engineering Research Center of Taihu Lake Water Environment,Wuxi 214000,China)
出处
《净水技术》
CAS
2018年第11期69-74,共6页
Water Purification Technology
基金
节能型泥水自循环污水处理装备研发及产业化(BA2015063)
关键词
泥水自循环反应器
水力特性
水力停留时间
停留时间分布
水力死区
alternate multi-tanks reactor（AMTR）
hydrodynamic characteristics
hydraulic retention time （HRT）
residence time distribution（RTD）
dead-volume
