A new screening building was constructed containing two new screening channels equipped with fine step screens each rated for 50 MLD to handle the peak wet weather flows. The new screens provide a significant improvement in removal of screenings and some FOG (fats, oils, and grease) to protect downstream processes and equipment. Screening washer-compactors were also installed to reduce the screenings moisture content, and thus weight, to reduce lifecycle costs of disposal. The existing grit vortex tanks were also retrofitted from an air-lift configuration to a pumped system. A new septage receiving building was constructed and is equipped with automated valving, flow metering, sampling, a grinder and rock trap. These upgrades facilitate an automated septage receiving, conditioning, and monitoring process which was previously unavailable. The solids treatment process was overhauled with existing thickening and dewatering processes replaced with rotary drum thickening and centrifuging processes. Most of the new equipment was installed within the existing sludge handling building to maximize the usage of existing infrastructure. Rotary drum thickeners, centrifuges, sludge pumps, and new conveyance equipment was implemented within the existing building, while new tankage was provided for sludge holding between processes. The core electrical infrastructure was also overhauled including new switchgear, MCCs, and distribution wiring. Two standby generators were Catherine Taddo - Manager, Development and Environmental Engineering for Public Works and Engineering Services. 85 APR 2023 | BUSINESS ELITE CANADA
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