Case Studies

Municipal Wastewater Treatment Plant

Project Summary

Essex County Wastewater Treatment Plant

  • Application: Municipal Wastewater Treatment
  • Year of Completion: 2003
  • System Type: Municipal Wastewater Treatment Plant, Surface Discharge

Municipal WW Case Study Large 1

The Problem

The town located in Essex County in southern Ontario is situated in a beautiful and pristine countryside. The area is home to older communities, many of which have either outdated wastewater treatment plants or have homes with poorly operating septic systems. The construction of new homes in the community combined with increasingly stringent wastewater discharge standards, required the construction of a new wastewater treatment plant for the community.

The receiving body for the wastewater treatment plant is the Belle River, which is a small meandering river that is used recreationally by the local residents. It was therefore very important that the river be protected by discharging only tertiary quality water from the treatment plant. In addition to ensuring that only very low levels of BOD and suspended solids are discharged, effective phosphorus removal was also a major consideration.

The town is home to many young families and the town engineers required a wastewater treatment plant that is as unobtrusive as possible and that does not require lagoons or holding tanks. Since the plant would be built into the community, it was essential that the plant also be hygienic and not give off unpleasant odours.

The Seprotech Solution

Following an extensive evaluation and selection process, Seprotech was chosen to supply a ROTORDISK® wastewater treatment plant. Seprotech worked closely with a construction company and their engineers as well as with town engineers, to create a first class treatment facility that is extremely compact, safe and reliable. The building is immediately adjacent to the banks of the Belle River and it blends seamlessly into the landscape.

Seprotech designed a tertiary wastewater treatment plant process that produces an effluent of BOD5 and TSS to <10 respectively and total phosphorus (TP) of <0.3.

The treatment process is summarized as follows:
  • Wastewater is pumped from a wetwell to the primary clarifier.
  • The wastewater flows by gravity to the Rotorzone of the ROTORDISK® .
  • The first two stages of the Rotorzone remove most of the BOD and TSS.
  • The third and fourth stages of the Rotorzone are for nitrification. Nitrification is a bacteriological conversion of ammonia nitrogen to nitrates.
  • The wastewater exits the rotorzone and flows into a final clarifier.
  • Following the final clarifier, the wastewater is filtered using Multi-Media Filters (MMFs).
  • MMF treatment is followed by an Ultra-Violet unit to ensure that bacteria are not being released into the Belle River.

This treatment plant incorporates many state-of-the-art features that allows the safe and effective discharge of treated effluent into a watercourse. Currently operated by third parties, this wastewater treatment plant requires approximately three hours of routine inspection, routine maintenance and effluent testing per week.

Applications: Municipal Wastewater Treatment