Efficient chemical and microbial removal of iron and manganese in a rapid sand filter and impact of regular backwash

by Haukelidsaeter, Signe, Boersma, Alje S., Piso, Lina, Lenstra, Wytze K., van Helmond, Niels A.G.M., Schoonenberg, Frank, van der Pol, Erik, Hurtarte, Luis C.C., van der Wielen, Paul W.J.J., Behrends, Thilo, van Kessel, Maartje A.H.J., Lücker, Sebastian, Slomp, Caroline P.