本研究通过以下方式评估关闭对生物活性炭（BAC）过滤器的影响:量化停滞的BAC过滤器内的亚稳态浓度变化；停堆期间监测BAC过滤器内的生物质浓度；并且，在过滤器关闭后重新启动后，监测过滤器出水的化学成分。在第一步中，测量溶解有机碳（DOC）、氨、溶解氧（DO）的浓度，以及替代参数亚硝酸盐、硝酸盐和溴化物；在第二步中，测量固定细菌的密度、悬浮细菌和内毒素的浓度；在第三步中，测量了DOC、氨、亚硝酸盐和溴化物的出水浓度。包括17个参考文献、表格、图表。

This study evaluated the effects of shutdowns on a biological activated carbon (BAC) filter by: quantifying the variations of substrated concentrations inside stagnant BAC filters; monitoring biomass concentrations inside BAC filters during shutdown; and, monitoring the chemistry of filter effluent after restart following a filter shutdown. In step one, concentrations of dissolved organic carbon (DOC), ammonia, dissolved oxygen (DO), and the surrogate parameters nitrite, nitrate, and bromide were measured; in step two, densities of fixed bacteria and concentrations of suspended bacteria and endotoxins were measured; and in step three, effluent concentrations of DOC, ammonia, nitrites, and bromide were measured. Includes 17 references, tables, figures.