A_2N序批式MBBR系统反硝化除磷试验研究

Denitrifying phosphorus removal in A_2N-sequencing batch moving-bed biofilm reactor system

通过将挂膜成功后的厌氧/缺氧序批式移动床生物膜反应器(A/A-SBMBBR)与硝化序批式移动床生物膜反应器(N-SBMBBR)连通成A2N序批式MBBR系统(A2N-SBMBBR双泥系统),运用该双泥系统探讨了移动床生物膜反应器对实际生活污水的反硝化除磷效能。在COD/TN平均值为2.98,单个运行周期为12 h的试验条件下,对COD、TN和TP的平均去除率分别为76.24%、72.5%和61.86%,其中TN、TP去除率最高分别达到77.86%和76.14%,系统发生的反硝化除磷现象表明,A2N-SBMBBR双泥系统对实际低COD/TN生活污水有较好的处理效果。

The A2N-sequencing batch moving-bed biofilm reactor system（ A2N-SBMBBR system）, which was made up of cultivation successful anaerobic/anoxic sequencing batch moving-bed biofilm reactor （A/A-SBMBBR） and nitrification sequencing batch moving-bed biofilm reactor （ N-SBMBBR）, was used to probe into the performance of denitrifying phosphorus on actual domestic sewage. Raw wastewater with low COD/TN （ average value 2. 98 ） was fed to the system at operational cycle time of 12 h. Under the experimental conditions, average removal efficiencies of COD, TN and TP were 76. 24%, 72. 5% and 61.86%, respectively, and the highest removal rate of TN and TP were 77. 86% and 76. 14%. It is shown that denitrifying dephosphatation took place in the system, and the result also indicates that the A2N-SBMBBR system has good performance on treating domestic sewage with low COD/TN.