Is insufficient wastewater treatment holding back growth in your community? Clearford can help


March 2016


In this issue:

Is insufficient wastewater treatment capacity holding back growth in your community?

Insufficient wastewater treatment capacity can easily become the bottleneck to community growth. Most communities tackle the problem at the treatment plant and opt for complex upgrades or an entirely new facility. Unfortunately these can be costly and time-consuming processes as teams conduct studies, obtain permits, select vendors and complete construction.

But there’s a faster and simpler solution from Clearford that turns the conventional approach upside down and eliminates the need for capital upgrades at the plant. Instead of making the plant do more, the Clearford process leverages the collection system to handle much of the pretreatment and dramatically reduce flow volumes and nutrient loading to the treatment plant.

In many cases, Clearford infrastructure can help avoid project delays, extend the life of the treatment plant by many years and bring about operational savings, even as the community grows.

The process starts by adding an underground ClearDigest™ smart digester for each residential connection as infrastructure is installed in a subdivision. This simple component plays a major role in reducing wastewater volume and load to the treatment plant. A smart digester can remove up to 75% of the solids and as much as 65% of the COD and BOD in wastewater. A patented mixing vent uses the energy of the inflow to gently agitate the solids and enhance decomposition. The process works so well that a ClearDigest system can operate for 10 years or more before a pump out is needed.

ClearDigest also modulates flow to the ClearConvey™ sewer system, which helps to deliver effluent to the plant with predictable characteristics and to limit peak flows. Unlike a conventional concrete or metallic sewer, the Clearford system uses sealed, flexible HDPE pipes that are impervious to groundwater infiltration and resistant to damage from ground movement. This alone, can significantly reduce the volume of water that reaches the treatment plant.

The reduction of solids in the collection system also means that sewer pipes can be sized smaller and can maintain cleansing velocity with lower slope. This translates into major savings in capital and installation costs by minimizing excavation costs and reducing the number of pumping stations as compared to conventional sewers. Plant headworks also benefit since no screening or primary settling is required for inflow from the ClearConvey sewer. In fact, the low solids content means that Clearford ClearRecover™ treatment plants are often built without any headworks whatsoever.

A comparison of a conventional sewer (top) vs the Clearford ClearConvey, which can be buried at lower depth,

requires lower slope and fewer pumping stations.

In many cases, municipalities can take advantage of Clearford’s Pay-for-Performance (P4P) financing program, which provides new wastewater infrastructure without taking on decades of debt or risky construction and performance promises. The P4P model enables municipalities to pay only for results, through a monthly fee for each connection to the Clearford One system, which covers all aspects of the system including construction, operation and maintenance.

Learn more about the advantages of the Clearford One system and P4P financing.

Contact us to discuss how Clearford One can enable growth in your community?

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Clearford systems help new subdivision overcome capacity issues at municipal lagoon

Development was at a standstill a few years ago in Almonte Ontario. The community’s wastewater lagoon was nearly at capacity and the full build out of the White Tail Ridge subdivision could not be completed unless there was a way to accommodate the additional wastewater volume and nutrient load that the new residents would generate.

Rather than expanding the existing treatment plant or building a larger one, Almonte instead selected Clearford’s innovative wastewater collection and conveyance system to provide significant reductions in the volume and nutrient load reaching the treatment lagoon. This approach would not only enable the project to proceed, but would also allow planners to expand the subdivision from 90 dwellings to 175.

Each home in the subdivision is equipped with a Clearford ClearDigest™ interceptor tank that collects wastewater from the home, removes solids, and performs about 75% of the secondary treatment. The tank also modulates outflow to the ClearConvey™ sewer system, which helps to avoid peak volumes and provide consistent, predictable flows to the treatment lagoon.

Effluent from the tanks is virtually free of solids and flows by gravity to a pumping station where it is transferred into the pre-existing force main sewer. The sealed HDPE pipes are not affected by groundwater infiltration, which contributes to further reductions in flows to the treatment plant. This also enabled water lines to be installed in the same trench, providing additional savings in capital and installation costs.

The system requires virtually no operator attention and is providing operational savings to the community through lower maintenance costs. Operators report that the ClearConvey sewer and the pump station do not experience problems with fats, oils and grease that other parts of the town do and have not required cleanout. The pump has also operated flawlessly and has not required deragging or suffered damage caused by debris, a typical problem for conventional sewers.

A Clearford lift station (left) handles virtually no solids compared to a conventional sewer (right),

which dramatically reduces the need for maintenance and damage caused by debris.

Phase two of the project is set to begin this year, adding 48 more connections to the original 76 homes. To date, the interceptor tanks have performed extremely well and the amount of pretreatment provided generally meets the expected wastewater chemistry targets.

Learn more about Clearford One and the advantages over conventional sewers.

Contact us to discuss a Clearford One system for the next phase of your community growth.

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Clearford in the news

Clearford’s P4P™ Financing Model Wins Corporate Innovation Award at Ontario Onsite Wastewater Association ConferenceRead more…Clearford Water Systems Begins Construction of Phase Two of Cayunda Project in Colombia

Read more…

Clearford Water Systems Secures Renewal of $100 Million Funding Commitment for Municipal Wastewater Projects in the Province of Ontario

Read more…


Clearford One Commissioning


April 21, 2016

Jambudiyapura, Gujarat

  First Clearford One installation in India!

2016 ORWC Septic Installer’s

Training Day

April 29, 2016

North Grenville Municipal Centre

Kemptville, ON

Join us for our presentation:

  Large System Design- Mobile Home Park

Wilf Stefan, P.Eng.

Book a meeting with us!

Learn more about Clearford One P4P


Clearford is part of the 2016 TSX Venture 50 as a top 10 performing TSX-V listed company in the Clean Technology & Life Sciences sector.

Learn more.

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