2.4. Virus abundance at a suite of AS WWTP's
AS samples were collected from 25 domestic WWTP's situated
within the North East of England, UK, in April and May 2013
(see Table 1 for plant configurations/characteristics). Triplicate
samples were collected, fixed and then analysed using
the optimised protocol (Fig. 7). The mixed liquor (volatile)
suspended solids (MLSS/MLVSS) were determined according
to Standard Methods