臭氧-生物活性炭工艺间歇性运行的生物量保持方法

研究臭氧-生物活性炭工艺在间歇性运行时炭层中生物量的保持方法以及不同保存方式对该工艺重新运行净化效能的影响。结果表明,臭氧-生物活性炭工艺在停止运行后对生物活性炭柱采用浸泡保存时,活性炭层中的水质发生了很大的变化,活性炭层中的生物量发生了下降。同时周期性的换水能够延缓活性炭柱在浸泡保存时生物量的下降速度。在臭氧-生物活性炭工艺重新运行期间,周期换水减少生物量的下降虽然对浊度和UV254的去除效果影响不大,但是能够使得臭氧-生物活性炭工艺在短时间内对CODMn和NH3-N的去除率接近活性炭工艺在保存之前对其的去除率。

Biomass retention method for intermittent operation of Ozone Biological Activated Carbon process

This paper studied the biomass maintaining method of Ozone Biological Activated Carbon(O₃-BAC)process when intermittent operation was conducted as well as the influence of different storage way on the purifying effect of O₃-BAC process rerunning. The results shows that when storage with immersion was implemented after O₃-BAC process stopped, water quality in the activated carbon layer has changed a lot, and biomass was decreasing. In the meantime, periodic water replacement could delay the decline of biomass when the activated carbon column was immersed in storage. When the O₃-BAC process was rerun, the decline of biomassbrought about by the periodic water replacement had little influence on the removal efficiency of turbidity and UV₂₅₄, but this operation could make the removal efficiency of COD_Mn and ammonia nitrogen by the O₃-BAC in a short time close to the same of the process before storage.