Case Studies

Nutrient Removal

Meeting a watershed-wide effluent phosphorous target (Cayuga, 2019)

• • process control approach to achieving a voluntary wastewater effluent Total Phosphorus target

  • achieved a 0.23 mg/L annual average effluent Total Phosphorus from a secondary treatment plant

Maximizing phosphorus removal from a secondary treatment system (Brantford, 2018)

• • benefits of maintaining stable process control

  • effluent TP averaged 0.17 mg/L for the study period

Two-step alum dosing (Galt, 2017)

• • process improvements by switching to dual point chemical addition

  • reduction in chemical used, filter backwash volumes, sludge production and risk of bypasses

Enhanced process control and minor upgrades support phosphorous removal and nitrification (Skyway, 2017)

• • meeting effluent targets for total phosphorous to support a Great Lakes Area of Concern

  • nitrification in winter months

  • demonstration of capacity – Identified an avoidance/deferral of a $33 million expansion/upgrade

Two-step alum dosing at a lagoon (Glencoe, 2020)

• 42% reduction in effluent phosphorus with a 5% decrease in alum dose

• reduced solids loading to filters

Industrial Discharges and Hauled Sewage

Controlling industrial discharges to improve plant performance (Brantford, 2017)

• • deferral/elimination of a $27.5M expansion/upgrade

  • meeting voluntary Total Ammonia Nitrogen and Total Phosphorous voluntary targets

  • near tertiary level treatment by a secondary treatment plant for total phosphorous

Improving nitrification at a treatment plant with variable sewage loading (Caledonia, 2017)

• • consistent nitrification to meet effluent compliance limits

  • avoidance of a $10 million dollar plant expansion to treat current flows

Re-rating and Capacity Demonstration

Treatment plant re-rating and phosphorous offset at two treatment plant (Haldimand County, 2018)

• • capacity demonstration to enable re-rating a treatment plant to a higher flow

  • offsetting phosphorus loading increase at a treatment plant via improving the performance of another.

Role of optimization in re-rating a wastewater treatment plant (Cayuga, 2016)

• • re-rating of the a wastewater treatment plant to allow additional development without expanding the treatment plant

  • meeting voluntary Total Ammonia Nitrogen and Total Phosphorous voluntary targets

Cost effective performance and capacity improvements at a wastewater treatment plan (Guelph, 2010)

• • stable nitrification; meeting residual chorine limits

  • enhanced capacity of plant staff and management

  • avoidance of capital upgrades

Skills Development

Optimization via the Composite Correction Program (2016)

• 1. 1. • management perspective on the benefits of implementing the optimization approach

Hands-on training for wastewater treatment plant performance evaluations (2016)

• 1. 1. • improved understanding of plant needs at eight wastewater treatment plants, and a basis for further technical assistance

        • training staff on Composite Correction Program techniques

Wastewater treatment plant optimization program with hum1an infrastructure at its core (Hamilton, 2013)

• 1. 1. • achieving year-round nitrification

        • better knowledge for capital spending decision making to meet future demands on the treatment plant