Re-stabilisation processes after scraping of full-scale slow sand filters

In this study, we investigated the impact of scraping on the processes responsible for microbiological water quality, dissolved organic carbon (DOC) and ammonium (NH4+) removal and the microbial community composition after scraping of full-scale slow sand filter (SSF). Scraping of the Schmutzdecke reduced biomass on sand in the top layers of the filter, while the main prokaryotic taxa in the sand bed remained unaltered.

本研究探究了规模化慢砂滤池（slow sand filter, SSF）刮膜作业对维持微生物水质、去除溶解有机碳（dissolved organic carbon, DOC）与铵态氮（ammonium, NH4+）的过程，以及刮膜后微生物群落组成的影响。刮除滤层污膜（Schmutzdecke）可降低滤池顶层砂层中的生物量，但砂床内的主要原核生物类群未发生改变。