TenCate Geosynthetics Netherlands bv

Geotube Dewatering Technology Provides the Perfect Solution For Waste Treatment - Case Study


Courtesy of TenCate Geosynthetics Netherlands bv

TenCate works with Canadian community to address local septage needs.

In 2002, Ontario's legislature and the Ministry of Environment (MOE) produced a policy paper announcing their intent to eliminate the land application of untreated septage. While 90 percent of residents in Ontario used local sanitary sewers to dispose of their waste, and therefore were unaffected by the policy, there were still more than one million residents in rural areas using septic tanks.

Haulers across Ontario were left in a bind, scrambling to find methods to treat and dispose ofthe septage. It was up to the local municipalities and the private haulers to come up with alternate methods to treat and dispose ofthe septage. Forthe smalltown of Eganville (population 3,455), located in Bonnechere Valley, the solution was found in Geotube dewatering containers, manufactured byTenCate.

TenCate develops and produces materials that function to increase performance, reduce cost, and deliver measurable results by working with our customers to provide advanced solutions.

Hometown Inspiration

The Geotube idea was originally presented by an Eganville resident Don Bishop, a Geotube manufacturer's representative, understood the benefits of dewatering technology and recognized the potential for a septage treatment application in his hometown. In Fall 2004 at the Eganville Wastewater Treatment Plant, Bishop presented a Geotube dewatering and contain¬ment demonstration for community leaders and public officials. 'The municipal leaders were impressed with the simplicity and cost effective¬ness of the Geotube technology,' said Bishop. 'The next step was to conduct further testing.'

Successful Pilot Test

The Eganville township first trial-tested Geotube dewatering technology in a small pilot project, processing about 21,000 gallons of septic tank waste in July 2005. A Geotube unit measuring 22 ft. x 22.5 ft. was filled and allowed to dewater through the winter months. Moisture continued to drain from the septage material. At the conclusion of the pilot test, the solids content of the septage in the Geotube unit had risen from 3% to almost 40%. The dewatering outcome was expected - however, the quality improvement of the septage material was a huge surprise. The pathogen content of the solids declined significantly. This was most likely due to the composting effect of holding the waste inside the Geotube container.

Not only did the Geotube unit successfully dewater the septage, the lab results of both the effluent and retained solids were impressive. The effectiveness of Geotube dewatering containers, along with the simplicity and affordability of the technology, encouraged Bonnechere Valley to implement Geotube units as a long-term solution for the treatment of septage and bio-solids from the wastewater treatment plant

Solid Operation. Proven Technology

Construction on the permanent dewatering and processing facility using Geotube technology began in September 2007 and was completed in April 2008. Located directly across the road from the wastewater treatment plant in Eganville, the dewatering facility is now fully operational and consists of six (6), 30 ft. circ. x 50 ft. long Geotube dewatering units.

The process for a hauler to empty their truckload at the dewatering facility is simple and straight¬forward. Haulers are required to pull their tanker truck up to the septage station and empty the load from their tanker into the 10,000 gallon underground holding tank. After emptying their truck, haulers can then drive away, and resume business as usual. Haulers no longer have to spend time land applying septage to fields.

'Bonnechere Valley Township now serves as a great example of how municipalities can address their septage treatment needs,' remarked Bishop. 'We are leading the charge in Ontario.'

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