曝气生物滤池不同挂膜方法预处理微污染水源水研究

EXPERIMENTAL STUDY ON DIFFERENT BIOFILM FORMATION METHODS IN BIOLOGICAL AERATED FILTER USED FOR PRETREATMENT OF MICRO-POLLUTED WATER SOURCE

采用陶粒填料曝气生物滤池预处理微污染水源水,对接种挂膜和自然挂膜2种挂膜方式下挂膜时间、生物膜生长形态特征及对微污染有机物和氨氮的去除情况进行了试验。结果表明,接种挂膜可以加快系统启动,比自然挂膜启动时间减少1周左右,并且生物量较多;系统成功启动进入稳定运行期间,2种挂膜方式下的微生物形态和特征基本相同;系统稳定运行期间,2种挂膜方法启动系统均取得较好的微污染物去除效果,自然挂膜对COD的去除效果稍好于接种挂膜,接种挂膜对NH3-N的去除效果要好于自然挂膜。

BAF was used for pretreatment of micro-polluted water source. Under the different bilfilm formation methods of natural biofilm, formation and inoculated biofilm formation, the time ofbiofilm formation, the biofilm morphology and characteristics, the removal effects of COD and NH3-N were analyzed. The results show that the inoculated biofilm formation can shorten the start-up time and the start-up time of the inoculated biofilm formation compared with the natural biofilm formation is shorted by about seven days, and the biomass is also greater. The biofilm morphology and characteristics are similar under the two different bilfiim formation methods during the stable operation of the systems. The two systems started by the two different bilfilm formation methods can both achieve better removal of micro-pollutants during the stable operation, and the removal of COD of the natural biofilm formation is slightly better than the inoculated biofilm formation, conversely, the removal of NHrN of the inoculated biofilm formation is slightly better than the natural biofilm formation.