Abstract Background Activated sludge (AS) systems in wastewater treatment plants (WWTPs) harbor enormous viruses that regulate microbial metabolism and nutrient cycling. significantly influencing the stability of AS systems. However. our knowledge about the diversity of viral taxonomic groups and functional traits in global AS systems is still limited. https://www.roneverhart.com/Lava-Music-Lava-ME-3-36-Smart-Guitar-in-Blue-w-Space-Bag-p22763/