One of our Geotube® shoreline systems makes a cameo in an educational video

DATE POSTED: June 29, 2022


One of our Geotube® Shoreline Systems is part of a new video from Healthy Lake Huron that provides essential information for waterfront property owners to assess, plan and mitigate erosion, flooding and unstable soil. 

In the video, a flyover of our Geotube installation at Port Franks, Ontario shows a wintery view of ice, snow and debris up against the 150-foot long, two-layer revetement. The system was installed in July 2021 as part of a project to protect the house from erosion and restore the sand and vegetation that had been washed away by high waves during storm events. 

The photo below shows the property before and after the sand was replaced and the Geotubes were installed. The erosion was quite severe and had advanced nearly to the cottage, putting it at risk of collapsing. 

Geotube shoreline before and after

Geotube Shoreline Protection is ideal to tackle increasing shoreline erosion and offer several advantages over conventional rip rap, armor stone or gabion baskets. 

  1. Virtually immovable mass – Once filled, a Geotube forms a monolithic structure that weighs many tonnes and is extremely difficult for waves, debris and ice to shift the Geotube container. The system rests on a specially designed scour apron which prevents waves from undercutting and compromising the structure. This is especially important when Geotubes are used to stabilize the toe of a bluff and protect it from wave attack.
  2. Deflective elliptical shape – As debris or ice advances towards the shoreline, the elliptical shape of the Geotube containers can deflect the material and force it up and over the structure. Conventional barriers made of materials such as armour stone or timber face the ice head-on and are often dislodged or heaved up.
  3. Durable, impact-resistant technology – Geotube containers are specially designed for shoreline protection and are manufactured using high-strength polypropylene multifilament yarns that meet several ASTM standards for fabric strength, seam strength, UV resistance and puncture resistance.
  4. Versatility and customizability – Geotube shoreline systems are available in several configurations and sizes. Each one is designed to provide maximum performance, lifespan and ease of installation. Many can also be custom manufactured to meet site specifications.
  5. Fast and easy to install – Geotube containers are filled in-place with a slurry mix of sand and water or locally dredged material. This simple process enables Geotube® containers to be installed much more quickly than conventional approaches such as armour stone or concrete.

Watch the video.

Learn more about Geotube Shoreline Protection Systems. 

Contact us to discuss Geotube shoreline protection for your property. 

Crafting a simple, affordable system to treat brewery wastewater and avoid sewer surcharges

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Solids and wastewater management for craft breweries

Sewer surcharges can significantly impact the bottom line for breweries and other food and beverage processors. Adding an onsite wastewater treatment plant is one way to reduce sewer surcharges, but many options are costly, complex, and require a significant amount of space, which can make it tough to decide whether to install a system or continue paying higher fees to the utility. 

Bishop Water recently completed pilot testing of an easy-to-operate, compact system at an Ontario craft brewery to demonstrate its ability to reduce the contaminants that are discharged to the municipal sewer and potentially eliminate sewer surcharges. 

A simple system for process solids and nutrients

The system combines two of our proven technologies, the Bishop Solids Management Solution and Bishop BioCord™ Reactors, to create a treatment train that can efficiently and affordably remove target contaminants like TSS, BOD, COD and adjust pH to the required discharge limits. 

It’s a challenging task. The raw wastewater from the brewery that the pilot system was treating had a pH of 4.6, and average concentrations of COD and ammonia of 42,822 mg/L and 116 mg/L respectively. 

Despite the high strength of this wastewater, we’ve designed the pilot system to operate with little operator oversight, low-energy consumption, few components and reliable performance. Here’s how it works. 

  • Raw wastewater is pumped to a mixing tank where a coagulant and flocculant are added to remove TSS and fine particles and pH is adjusted to the required range. 
  • Flocculated material is pumped to a Geotube geotextile dewatering bag, which retains the solids and releases clear, low-TSS filtrate. 
  • BioCord Reactors, an aerated, fixed-film biological treatment system, provides robust, low-energy removal of soluble BOD, COD and ammonia. 

Our pilot system ran for about a year and consistently achieved a high level of contaminant removal, even though there were significant fluctuations in loading rates, which can be seen in the graph below.  

The results showed the following: 

  • Average TSS removal efficiency of 99%
  • Average COD removal efficiency of 72.59%
  • pH consistently adjusted to 7.6
BioCord Reactors COD Removal
Total COD concentrations in the influent and the effluent to the BioCord Reactor

We also noted that the BioCord system achieved simultaneous COD and ammonia removal, achieving average ammonia removal efficiency of about 36%. BioCord is capable of achieving greater than 90% ammonia, and although ammonia removal was not a target contaminant in this study, the rate could be improved by reducing the C:N ratio of the influent. 

Although the pilot system was small, with a BioCord Reactor volume of only 120L, the system is easily scalable and customizable to handle larger flows and greater loading of TSS, COD and BOD from breweries or food processors. It also operates with fewer components, uses less electricity and requires less oversight and maintenance than alternative treatment technologies such as MBBR or MBR. 

Although the pilot system was small, with a BioCord Reactor volume of  only 120L, the system is easily scalable and customizable to handle larger flows and greater loading of TSS, COD and BOD from breweries or food processors. It also operates with fewer components, uses less electricity and requires less oversight and maintenance than alternative treatment technologies such as MBBR or MBR. 

Read the paper Wudneh Shewa presented at the WEAO 2022 Annual Conference, Using Compact, Low-energy Onsite Systems to Treat Brewery Wastewater with High Levels of BOD and TSS

Learn more about our Bishop Solids Management Solution and BioCord Reactors for simple, low-energy treatment of high strength wastewater from breweries and food and beverage processing. 

Contact us to discuss a system for your facility. 

ClariPhos™ receives ECA for phosphorus removal, enabling pilot testing throughout Ontario

DATE POSTED: June 1, 2022


ClariPhos Clarifier

Bishop Water now has an Environmental Compliance Approval (ECA) for our ClariPhos™ Rare Earth Coagulant, which means we can simplify the process to temporarily replace conventional coagulants and demonstrate the impressive phosphorus removal abilities of this product at wastewater plants throughout Ontario.

Our ECA enables wastewater plants that don’t have Limited Operational Flexibility ((LOF) to conduct a ClariPhos pilot without amending their current ECA. Once the performance and benefits of ClariPhos have been validated, plant administrators can apply to change their ECAs.

ClariPhos is a game-changing technology that dramatically outperforms aluminum- or iron-based coagulants for phosphorus removal. With ClariPhos, wastewater treatment plants can achieve ultra-low phosphorus limits—as low as 0.07 mg/L—without the need to install or upgrade costly tertiary filtration systems.

ClariPhos maintains a 1:1 molar dose ratio, even when achieving ultra-low phosphorus limits. By comparison, conventional coagulants are typically dosed at a 5:2 molar ratio and can climb as high as 8:1. As a result, ClariPhos can reduce sludge production by as much as 50% and the associated costs of sludge management.

ClariPhos Sludge Comparison
A comparison of sludge produced to remove an equivalent amount of phosphorus.

Switching to ClariPhos is easy.
In most cases, operators can replace conventional aluminum or iron coagulants with ClariPhos. The product requires no special chemical feed equipment and will often work with existing feed pumps.

Bishop Water provides comprehensive services for a pilot or full-scale implementation of ClariPhos. Our team will assess your plant’s current phosphorus removal equipment and operation to determine the optimal dosing location and dose rate. Samples will also be obtained at various points in the treatment process to optimize ClariPhos performance through steady conditions as well as variable flows and loads.

Once ClariPhos is fully implemented, Bishop Water can provide ongoing support through routine technical service visits and ongoing sampling, analysis and optimization.

A ClariPhos pilot may be eligible for funding from the Federation of Canadian Municipalities Green Fund, which supports innovative wastewater treatment initiatives.

FCM

Learn more about ClariPhos Rare Earth Coagulant.

Contact us to discuss a ClariPhos pilot or switch for your treatment plant.

ClariPhos™ coagulant improves UV disinfection for Ontario WWTP

DATE POSTED: April 29, 2022


How much can a phosphorus coagulant influence the performance of a wastewater plant’s UV disinfection system?

A lot more than you might think.

After switching to ClariPhos™ Rare Earth Coagulant to evaluate its ability to improve phosphorus removal, operators at an Ontario WWTP noticed that UV disinfection also experienced a big boost. It turns out that better settling in the clarifier led to higher UV transmittance in the effluent, and a significant improvement in UV disinfection.

ClariPhos UVT and E.coli

Better clarifier performance = higher UVT
UV transmittance, or UVT, is a measurement of the UV energy that passes through a water column relative to the energy emitted by a UV lamp. Low UVT means that suspended or dissolved contaminants are blocking or absorbing UV light and preventing the UV energy from reaching target pathogens.

High UVT means the opposite. In this case, UV light can easily pass through the water column and effectively inactivate pathogens.

Prior to switching to ClariPhos, the plant was using ferric chloride to precipitate phosphorus. With this chemical, the plant typically achieved UVT in clarified effluent of about 55 – 60%.

With ClariPhos, the plant was able to consistently achieve UVT above 60%, enabling better performance from the UV disinfection system.

ClariPhos outperforms Al- and Fe-based coagulants
ClariPhos improves clarifier performance because it is made with the rare earth elements cerium and lanthanum, which have a very high affinity for phosphorus. These elements form a tight ionic bond with phosphorus to create rhabdophane (Ce/LaPO4), a dense and insoluble precipitate.

ClariPhos Rare Earth Coagulant

ClariPhos precipitate is also more stable and heavier than that produced by Al- or Fe-based coagulants so it settles up to two times faster. The results are improved clarifier performance and reduced risk of carryover of suspended solids.

Switching to ClariPhos is easy. In most cases, plant operators can simply replace conventional alum or ferric coagulants with ClariPhos to easily and cost-effectively improve the chemical precipitation and settling of phosphorus. ClariPhos requires no special chemical feed equipment and will often work with existing feed pumps.

Learn more about ClariPhos and how it helps improve phosphorus removal, reduce sludge production and boost the performance of UV disinfection.

Contact us to discuss switching your phosphorus coagulant to ClariPhos.

The advantages of low-energy, high-performance Geotube dewatering for biosolids management

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Geotube dewatering

Spinning, squeezing, solar drying, there are many ways to dewater sludge from treatment plants and produce stabilized biosolids that are ready for land application or disposal. Selecting the best approach often considers several factors, including the speed at which dewatering must be completed, the space that’s available at the treatment plant to accommodate the process, and capital and operating costs.

Simple solutions such as solar drying may seem less costly initially, but the process is laborious and time-consuming and may drive up staff costs. Mechanical processes may work more quickly, but often incorporate complex, energy-intensive mechanical equipment that is costly to buy, maintain and operate.

Geotube® Geotextile dewatering of wastewater sludge provides simple, low-energy operation, efficient dewatering with little operator attention, and a customizable footprint to fit the plant configuration.

Single-step process for solids collection, consolidation and dewatering

The Bishop Solids Management Solution is used by municipal and industrial treatment plants throughout Canada to capture, dewater and consolidate solids in a single step. The system incorporates Geotube geotextile containers and a unique Venturi Emulsion Polymer Activation System (VEPAS™) to do the bulk of the work. Dewatering is achieved largely by gravity, which helps reduce capital cost, simplifies operation and makes the system very energy efficient. Electricity is required only for the sludge feed pump and the VEPAS.

VEPAS
The compact VEPAS automatically activates and injects polymer in a single step to enhance dewatering and retain contaminants.

Geotube containers are made from a high-strength, tightly woven polypropylene fabric that provides both containment and filtration. Solids can be pumped directly from sludge storage tanks, lagoons or digesters to the Geotube. Along the way, the VEPAS activates and adds polymer on the fly, directly into the sludge feed line. This innovative system can operate automatically and eliminates many of the components in mechanical polymer systems, such as mixers and tanks, which take so much time to maintain and clean.

The specially selected polymer performs several functions in the process. It accelerates the dewatering process, enabling filtrate to flow almost immediately through the pores of the Geotube container and preventing clogging. The polymer also helps retain BOD, TSS and many other organic and inorganic contaminants in the dewatered solids.

Depending on the application and discharge regulations, the filtrate could also meet permit limits for release into a receiving body or non-potable reuse. At a municipal treatment plant, the filtrate would typically be sent back to the headworks for treatment prior to discharge.

Filling a Geotube container usually occurs in batches, so it may take several pumping sessions over a period of weeks or months before the container is full. After each session, the container is allowed to dewater, which reduces the volume and creates space for additional sludge to be added. This process can occur year round, even in cold climates. Where temperatures fall below freezing, a greenhouse can be cost-effectively built to maintain temperatures above freezing and ensure filling and dewatering is possible.

Once the container is full, it will undergo a period of consolidation where dewatering continues and a composting effect reduces pathogens. Solids content can go as high as 40% and the process emits no significant odour, simplifying the handling and reuse of the solids as a soil amendment.

Replacing solar drying beds to reduce labour costs

The Meteghan Sewage Treatment Plant (STP) in the Municipality of Clare, Nova Scotia, used to spread sludge onto drying beds. Then, after drying the sludge for about a month, operators would rake it by hand into wheelbarrows and load it into trucks for disposal. It was a lengthy, time-consuming process that dramatically reduced the amount of time that operators could spend on much-needed infrastructure projects, such as plant process optimization and reducing inflow and infiltration in the collection system.

The Bishop Solids Management Solution replaced solar drying beds at the Meteghan STP to dramatically reduce the amount of time operators spend on sludge management.

In November 2016, the Meteghan STP began using a Bishop Solids Management Solution, enabling the plant to collect and dewater the same volume of sludge in about five hours, rather than several weeks. Since commissioning, the plant has dewatered over 1 million litres of sludge and has saved hundreds of hours in labour.

Sludge from the plant is pumped directly from the sludge storage tank to a Geotube geotextile container, which provides storage, consolidation and passive dewatering of the sludge. As the sludge is pumped, a specially selected polymer is added to accelerate and enhance the dewatering process.

The dewatering cell, which occupies about 232 m2 was constructed in the same location as the drying beds and is capable of accommodating two Geotube containers. Each container is about 13.7 m in circumference and 17.4 m long.

A cost-effective method to accept septage at a municipal plant

The Eganville Wastewater Treatment Plant (WWTP) in Ontario, has operated a sludge and septage dewatering facility since 2008, using the Bishop Solids Management Solution. This innovative facility has a dual purpose, providing a simple, low-energy process for dewatering and stabilizing aerobically digested sludge from the municipal treatment plant, as well as septage brought in by local haulers.

The process not only simplifies sludge management from the treatment plant, it also provides a local facility where haulers can empty septage. Many treatment facilities are unable to accept septage and haulers often travel great distances to empty their trucks. This is a time-consuming process that results in added costs for property owners and increased greenhouse gas emissions from vehicles.

The Eganville WWTP has used the Bishop Solids Management Solution since 2008 to dewater sludge and accept septage from local haulers.

Sludge from the treatment plant and septage from haulers are both sent to a 37.8 m3 underground holding tank, which is recirculated once full to ensure the solids are well blended. Pumps then move the sludge to a Geotube container. As the sludge is pumped, polymer is added directly into the feed line to enhance the dewatering process and help retain contaminants in the container.

The laydown area can accommodate up to six 15.25 m long Geotube containers, two of which are set up inside a greenhouse. The greenhouse maintains an indoor temperature above freezing and enables the facility to receive and dewater sludge and septage year round.

After a period of dewatering and stabilisation, the biosolids are typically sent to the municipal landfill where they are not buried, but instead used as a soil amendment to the final cover.

Eganville WWTP continues to accept septage from local haulers on a fee-for-service model, which helps support the operation and potentially opens new revenue opportunities by extending the service to a wider area of haulers.


Learn more about the Bishop Solids Management Solution.

Contact us to discuss a simple, low-energy system to collect, dewater and consolidate sludge at your wastewater treatment plant.

BioCord™ pilot system demonstrates MDMER ammonia compliance for Canadian gold mine

DATE POSTED: March 30, 2022


BioCord pilot system to meet MDMER  ammonial compliance

At the end of 2021, we began analyzing data from a BioCord™ Reactor pilot system that had been running at a gold mine since August. The project’s objective was to show that a low-energy, fixed-film BioCord system could improve ammonia removal for the onsite wastewater lagoon system and help the mine maintain compliance with the Metal and Diamond Mining Effluent Regulation (MDMER). Changes to MDMER came into effect in June 2021 and set a new, stronger federal effluent limit of 0.5 mg N/L for unionized ammonia.

Our BioCord pilot system didn’t disappoint us or the client. Our team tested the system using influent from two different wastewater sources, with average ammonia concentrations of 4.8 and 22.3 mg/L. Over the four months that the containerized BioCord system ran, it consistently achieved the 0.5 mg N/L regulatory requirement and removed up to 80% of the influent ammonia—even when the water temperature was as low as 0.5⁰C.

BioCord MDMER ammonia removal
The BioCord Reactor pilot system removed up to 80% of the influent ammonia (left) and consistently achieved the MDMER limit for unionized ammonia in treated effluent (right). 

More nitrifying bacteria = better ammonia removal

BioCord reactors during installation and with biofilm.

Temperature is an important consideration, since the bacteria that provide ammonia removal are temperature sensitive and under cold conditions become less active and therefore less effective. As a result, the wastewater lagoons at many mines, and other industrial sites, struggle to achieve the required ammonia target during the winter months. 

BioCord solves that problem by developing a robust, stable biofilm that remains productive under cold conditions. The pilot system even experienced high loading of heavy metals, which can inhibit nitrification and ammonia removal. However, despite that challenge, the BioCord system continued to perform well and maintained a high ammonia removal rate. 

Full-scale systems can be quickly and cost-effectively installed

A full-scale BioCord Reactor can be installed directly into the treatment lagoon – often while it remains in operation. Our engineers design the system based on the incoming ammonia load and the desired removal rate. BioCord’s in-situ design offers a big advantage over sidestream systems, such as MBBR, because BioCord avoids the additional cost and operational oversight associated with the tanks, blowers, pumps and consumables of those alternative systems. BioCord’s modular design also enables it to be easily expanded, simply by adding more media to the lagoon to handle higher loading or removal rates. 

Learn more about the advantages of BioCord Reactors for lagoon upgrades. 

Contact us to discuss a BioCord Reactor system to improve year-round ammonia removal and MDMER compliance for your site. 

Operators traded wheelbarrows for Bishop Solids Management solution to reduce time and labour in sludge handling 

DATE POSTED:


Meteghan STP - Bishop Solids Management Solution

It used to take almost a month to dewater the same volume of sludge that is now done in less than a day at the Meteghan Sewer Treatment Plant (STP) in the Municipality of Clare, Nova Scotia, according to Jody Comeau, Treatment Plant Operator. The dramatic savings are possible after replacing sand drying beds with a simple, low-energy Bishop Solids Management Solution, which uses only Geotube® containers, polymers and gravity to collect and dewater the sludge in a single step.

The comprehensive dewatering system, designed and supplied by Bishop Water Technologies, has been operating since November 2016. Waste sludge from the plant is now pumped directly from the sludge storage tank to a Geotube container. As the sludge is pumped, Bishop Water’s Venturi Emulsion Polymer Activation System (VEPAS) injects polymer directly into the sludge line and activates the polymer in a single pass, with no mechanical mixing required. In many cases, the optimal polymer dose can produce dry solids from waste sludge in excess of 50%.

VEPAS_Meteghan

The one-step, venturi-based VEPAS eliminates many of the components used in mechanical polymer systems, such as mixers and aging tanks, which not only increase the size of mechanical systems, but also require operator attention for maintenance and cleaning.

“Our sludge does experience some variability depending on the time of year and how long it’s been held in the storage tank,” Jody says. “It only takes a few minutes to test the sludge and set the VEPAS, using the touch screen interface, to add the ideal polymer dose.” The VEPAS enables operators to easily change the rate of polymer flow prior to starting the waste sludge pumps or while the system is operating to address any variability in the sludge consistency.

Once the run is finished, Jody says he can clean any remaining polymer out of the compact VEPAS system in about 10 minutes and have it ready to go for the next session.

VEPAS and Geotube® replace labour-intensive sludge handling
“The Bishop Solids Management Solution is far less labour intensive than our drying beds,” Jody says. “I now have much more time to spend on more important tasks like plant process optimization and reducing inflow and infiltration in the collection system.”

Prior to commissioning the Bishop Water system, Jody says that operators would spend many hours raking dry sludge by hand from the drying beds and piling it onto wheelbarrows. Each bed contained about 50 wheelbarrows of dry sludge that was then loaded onto trucks for disposal.

“Bishop Water and the local representative, Scotia Tech, were extremely helpful and responsive during the training process and in providing ongoing support,” Jody says. “We’re quite pleased with the way the system is working.

Jody says the municipality is investigating the possibility of land applying composted solids from the Geotube® containers onto a former landfill site, further reducing disposal costs and truck traffic.

Learn more about the Bishop Solids Management Soluiton and the easy-to-use VEPAS.

Contact us to arrange a sludge dewatering test and to discuss a Bishop Solids Management Solution for your treatment plant.

Watch our VEPAS video to see how quickly and easily the system can be cleaned.

For sales and service of Geotube® containers and BioCord reactors in Atlantic Canada contact Scotia Tech Fluid Services or Bishop Water Technologies.

Scotia Tech
Paul Saulnier
902-237-3865
paul@scotiatech.ca

New research shows BioCord Reactors achieve 99% ammonia removal using far less energy than MBBR  

DATE POSTED: February 28, 2022


Aeration is the most energy-intensive process for a wastewater treatment plant, accounting for 50 to 80 percent of a facility’s total energy demand. That’s why our R&D efforts for BioCord™ Reactors focus significantly on optimizing its fine-bubble aeration system and low-energy compressors to provide the best possible oxygen transfer and ammonia removal rates, while using less energy than MBBR.

We recently completed a research project that proves BioCord’s efficiency and dramatic advantages over alternative technologies that rely on coarse-bubble aeration, such as MBBR. The results show that BioCord Reactors can achieve 99% ammonia removal with only a small fraction of the air and energy compared to an MBBR alternative.

Why is BioCord so Efficient?

There are several reasons. First among them is that BioCord offers significantly more surface area. Second is that BioCord media is suspended from a frame and does not require high airflow from energy-intensive blowers to move and mix carriers. Even BioCord in cold weather applications is proven for ammonia removal. Read the full paper to learn more about the performance and advantages of BioCord Reactors.

We are grateful for the resources and support of Dr. Martha Dagnew and Lin Sun of the Department of Civil and Environmental Engineering at Western University.

Paper - Biological treatment of municipal wastewater using fixed rope media technology: Impact of aeration scheme.

Download the paper.

Learn more about BioCord Reactors for simple, low-energy ammonia and organics removal.

Contact us to discuss BioCord Reactors for your wastewater treatment plant.

How a polymer dosing system can make or break your sludge dewatering process.

DATE POSTED:


Polymer dosing systems for dewatering.

Polymer is the secret ingredient for maximizing dewatering and achieving high quality filtrate from the Geotube® containers in our Bishop Solids Management Solution. But selecting the right polymer is not enough to get the best results.

Precise dosing is critical to ensure that the operation runs smoothly and that dewatering occurs as required without any unfortunate incidents. Not enough polymer will result in poor dewatering performance, insufficient solids retention and low-quality filtrate. Too much polymer can clog the pores of the Geotube container and prevent water from being released. In such a case, the bag is no longer usable and could burst if operators fail to notice the problem and overfill the container.

VEPAS Polymer Dosing System
VEPAS Polymer Dosing System

Bishop Water’s VEPAS™ (Venturi Emulsion Polymer Activation System) is an easy-to-use and affordable system that mixes and fully activates liquid polymer emulsions in a single step, adds the precise dose directly into the sludge feed line and eliminates the need for messy mechanical mixers and bulky aging tanks.

Compact size, smart controls

VEPAS polymer dosing can be configured to monitor sludge flow and consistency using flow and mass meters, enabling it to automatically adjust polymer dose to achieve the optimum mix and dewatering properties. These smart controls also communicate with 4-20 mA inputs, which enables VEPAS to be integrated to the plant SCADA system and configured to automatically begin operating when sludge pumps are activated.

The compact, skid-mounted VEPAS occupies a fraction of the space of a conventional mechanical polymer system and can be quickly installed for new or retrofit applications in treatment plants, mobile trailers, or utility buildings.

Our Bishop Solids Management Solution with Geotube® dewatering technology and VEPAS is an integrated solution that can work with any wastewater treatment plant or industrial process to collect and dewater slurry materials. This enables any facility to build a compact, rapid dewatering solution that saves time, reduces operating costs, and simplifies sludge management.

A simple test can help us determine precise dosing of the polymer selected for your site and build a skid-mounted system that can be installed quickly. Once installed, our team can provide onsite training and are easily accessible to assist with ongoing maintenance and support.

Geotextile sludge management system provides long-term savings for North Rustico WWTF

Read a recent article that shows how our Bishop Solids Management Solution and VEPAS enabled the North Rustico WWTF to simplify sludge handling and significantly reduce operating costs.

Learn more about VEPAS.

Contact us to discuss a Bishop Solids Management Solution or VEPAS for your treatment plant.

Comparing carbon footprints: Geotube® containers vs. rocks for shoreline protection

DATE POSTED:


Geotube vs rocks for shoreline protection

Geotube® containers or rocks?

Which do you think offers a lower carbon footprint when constructing a breakwater structure?

Knowing the carbon footprint of your breakwater project can play an important role in fully understanding the environmental impacts of a project as well as the energy required for its construction; including extraction, manufacturing, transportation, installation, etc.

There are many options and variables to consider when building a breakwater structure and as a result, carbon footprints can differ dramatically. In each case though, our carbon calculator performs a detailed analysis of lifecycle carbon emissions and helps to quantify the environmental impact of each approach.

So, what’s the answer? It’s often Geotube®. Here’s an example that shows why.

This situation considers a 930-metre-long, 1.8-metre-high breakwater structure to protect a section of Lake Ontario shoreline.

Transportation makes the difference

To create a rock breakwater, the material would have to be transported by a convoy of trucks from a quarry that is about 160 km away. A conservative estimate for the amount of rock required is about 13,600 tonnes.

A breakwater structure made of Geotube® containers, however, could be filled with sand that is dredged from the lake at the construction site. This approach dramatically reduces truck traffic and could also reduce the time required and cost to complete the project. The proposed Geotube® system would require about 10,000 cubic metres of sand to fill the containers to the required height.

Once all the factors are considered, our carbon calculator shows that the breakwall constructed from Geotube® containers, using locally dredged sand, can be built with a significantly smaller carbon footprint.

Geotube Carbon Calculation - Shoreline System

And the winner is:

Geotube® breakwater carbon footprint: 175 tonnes CO2

Rock breakwater carbon footprint: 2,824 tonnes CO2

Result: The Geotube® breakwater project is lower in overall carbon emissions by 2,649 tonnes.

Download the detailed carbon footprint calculation.

Learn more about Geotube® Shoreline Protection.

Contact us to discuss your shoreline protection project and for a detailed carbon footprint calculation of a Geotube® breakwater structure vs. other approaches.