S. Stoveland

A study of the factors which influence metal removal in the activated sludge process

John N. Lester, J. Lester, S. Stoveland, 1980 .

The influence of nitrilotriacetic acid on heavy metal transfer in the activated sludge process—II. At varying and shock loadings

John N. Lester, Roger Perry, R. Perry, 1979 .

The balance of heavy metals through a sewage treatment works II. Chromium, nickel and zinc

John N. Lester, M. Astruc, Roger Perry, 1979 .

The influence of nitrilotriacetic acid on heavy metal transfer in the activated sludge process-I. at constant loading

John N. Lester, Roger Perry, R. Perry, 1979 .