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| Ottawa Area Wastewater Treatment Plant |
| Application: |
New Home Subdivision |
| Year of Completion: |
2004 (In progress) |
System Type:
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Tertiary Wastewater, Advanced Phosphorus Treatment |
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The land developer wanted to construct about seventy-five townhomes on a very small property in the community of Manotick, which is part of the City of Ottawa. Manotick is not serviced with a sewage pipeline and the City required the construction of an on-site wastewater treatment plant to treat the domestic wastes as a condition of property development. Several past attempts had been made to develop the property, all of which had failed. Adding to the complexity of this project is the fact that the wastewater plant is within 10 meters of surrounding homes.
The receiving body of water for this plant is the Rideau River. The Rideau River is deemed to be a Policy 2 watercourse in the province of Ontario and therefore wastewater effluent plant discharge standards are extremely rigorous. The Ontario Ministry of Environment (MOE) issued a certificate of approval for the facility specifying a tertiary quality discharge standard. In addition, the regulator established a Phosphorus discharge standard of 0.03 mg/l which is the tightest effluent discharge standard ever applied to an operational wastewater treatment plant in Canada. |
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Seprotech has been pioneering Advanced Phosphorus (Advanced-P) technology for over ten years and was approved by the City of Ottawa to build the first ever plant of this type in Canada. The City of Ottawa is leading the rest of Canada in demonstrating that wastewater effluent discharge quality can be to a much higher standard.
Seprotech worked closely with the developer, developers engineer and city engineers to design a state of the art wastewater treatment plant. Designed with the architectural features of the surrounding homes, the Manotick wastewater treatment plant is absolutely unrecognizable as a facility that is designed to treat wastewater. The building is architecturally designed with stone finishes, wainscoting and a pitched roof. When landscaped, the facility will form part of the community streetscape and will challenge even the most ardent skeptics as to the efficacy of on-site treatment.
Seprotech designed a tertiary wastewater treatment plant process that would produce an effluent that reduced BOD5 and TSS to <10 respectively and Ammonia Nitrogen of <5. The phosphorus discharge criteria is <0.03.
The treatment process is summarized as follows: |
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Wastewater is pumped from an equalization tank to the primary clarifier located within the plant structure. |
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The wastewater flows by gravity to the Rotorzone of the ROTORDISK®. |
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The first two stages of the Rotorzone remove most of the BOD and TSS. |
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The third and fourth stages of the Rotorzone are for nitrification. Nitrification is a bacteriological conversion of ammonia nitrogen to nitrates. |
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The wastewater flows into a final clarifier. |
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Following the final clarifier, the wastewater flows through two specialized filters. These are advanced multi-media filters (MMF's) that are arranged in series. One filter is sufficient to reduce phosphorus to 0.03mg/l, however, a second filter provides added security. |
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Following advanced filtration the effluent is passed through an Ultra-Violet unit as a final precaution. The wastewater is then discharged to the Rideau River. |
| The Manotick wastewater treatment plant is the most advanced tertiary wastewater treatment plant in Canada and it sets global standards for the removal of phosphorus. Seprotech is leading the way in setting new standards that will be adopted by environmental authorities and governments. |
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Applications - Municipal Wastewater Treatment