Removal of a 400-HP positive displacement rotary lobe roots blower, installation of a new 300-HP Sulzer turbo blower, the replacement of process air piping and butterfly valves associated with the blower, and the upgrading of the concrete pad and electrical and I&C components associated with the blower at Clavey WRF; removal of a 500-HP positive displacement rotary-lobe Roots blower, the installation of a new 500-HP Sulzer turbo blower, the replacement of process air piping and butterfly valves associated with the blower, and the upgrading of the concrete pad and electrical and I&C components associated with the blower at Waukegan WRF, removal of a 500-HP positive displacement rotary-lobe Roots blower, the installation of a new 300-HP Sulzer turbo blower, the replacement of process air piping and butterfly valves associated with the blower, and the upgrading of the concrete pad and electrical and I&C components associated with the blower at Gurnee WRF
