Wastewater

The Delhi Wastewater Treatment Facility uses a conventional activated sludge system to treat wastewater from the community. The process begins with screening and grit removal, followed by phosphorus removal using ferrous chloride in the primary clarifiers. These tanks also handle sedimentation and floatation to separate solids from liquids.

In the next stage, aeration tanks equipped with fine bubble diffusers provide oxygen to support biological treatment. The wastewater then moves to secondary clarifiers, where remaining solids settle out—some of which are recycled back to maintain the biological process.

For final polishing, the treated wastewater passes through cloth media filters, followed by UV disinfection to ensure it's safe before being released into Big Creek.

To manage residual solids, the facility includes two aerobic digesters, which use oxygen to stabilize sludge and scum. The plant also features an odour control system with fans and a biofilter to minimize impact on nearby neighbourhoods.

The Port Dover facility uses a conventional activated sludge system to treat local wastewater. It begins with screening and grit removal, along with phosphorus control using ferrous chloride. A splitter box sends flow into one or more of the primary clarifiers, which remove solids through sedimentation and floatation.

Next, wastewater flows into two aeration tanks with mechanical aerators that add oxygen, supporting biological treatment. The wastewater is then sent to secondary clarifiers, where solids settle again. Some of this material is recycled to help maintain the treatment process.

To disinfect the treated wastewater, sodium hypochlorite (chlorine) is added, followed by de-chlorination using sodium bisulphite before safely releasing it into Lake Erie.

The facility has an anaerobic digester, which uses heat and mixing (without oxygen) to stabilize sludge. It also accepts hauled waste, which is treated alongside regular sewage.

Port Rowan’s facility uses an activated sludge system with membrane filtration for high-quality treatment. It starts with screening and grit removal, then adds ferrous chloride for phosphorus removal in primary clarifiers.

After this, the wastewater moves to aeration tanks with fine bubble diffusers, supporting biological treatment. The next step is membrane filtration, which removes remaining solids using a microfiltration system.

The treated wastewater is discharged into Dedrick Creek, which flows to Lake Erie. The facility also handles hauled waste, mixing it with incoming sewage for treatment.

For solids handling, there’s an aerobic digester, which uses oxygen to stabilize sludge. The site includes two odour control systems with fans and biofilter media beds, helping keep the surrounding air clean.

Simcoe’s facility is the largest in the county and uses a conventional activated sludge system. Wastewater treatment begins with screening and grit removal, followed by primary clarification and phosphorus removal using ferrous chloride.

Biological treatment takes place in aeration tanks with fine bubble diffusers, and then in secondary clarifiers where solids settle. Some of these solids are recycled back into the system.

The treated wastewater is then disinfected using chlorine, followed by de-chlorination with sodium bisulphite. Tertiary treatment uses automatic disk filters to remove fine particles before being released into the Lynn River.

Simcoe also treats hauled waste and landfill leachate and features three anaerobic digesters for sludge stabilization. These digesters use heat and mixing to process and thicken sludge before removal.

Waterford’s treatment facility uses a lagoon-based system, offering a natural and energy-efficient way to treat wastewater. After screening and grit removal, wastewater enters aerated lagoons where oxygen supports biological treatment.

It then flows to a facultative lagoon, which uses both aerobic and anaerobic processes. From there, the wastewater moves through SAGR beds (Submerged Attached Growth Reactors) and a multi-stage sand filtration system.

Ferric chloride is added partway through the filtration process to help with phosphorus removal. The final step is UV disinfection, after which the treated wastewater is safely released into Nanticoke Creek.