Watch the Video: TenCate Geotube® Water Remediation

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Watch the new video: TenCate Geotube® Containers use in Mining and Mineral Processing

Watch the new video: TenCate Geotube® Containers use in Mining and Mineral Processing

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WaterSolve’s March 2015 Newsletter – Case Study of the Month

Case Study of the Month

Waste to Energy Facility – Camden, NJ

An Energy-from-waste facility in New Jersey chose a Geotube® system to dewater ash sludge residuals from their waste pond on site. For this project, the Geotube® dewatering system was selected as an alternative to mechanical dewatering and was used for evaluating permanent installation of the system for ongoing operations. Geotube® MDS containers were placed in dewatering and roll-off boxes in the containment area located near the waste pond. The objective of the project was to process and manage the ash sludge residuals to pass a paint filter test for subsequent disposal. Upon completion, evaluations would be made on future clean-out of the waste pond with the ultimate goal of installing a permanent system for solids dewatering on site.  Our local sales agent, Peter Kaye, helped with this project.  He can be reached at pkaye8@verizon.net or 215-870-7866.

WaterSolve LLC provided the equipment, Geotube® containers, chemistry, chemical feed equipment, and operation of the equipment to filter and collect the ash sludge from the waste pond. WaterSolve personnel were on site to assemble the polymer make-down unit as well as the Geotube® containers. Upon completion, pumping from the sludge pond would start and continue for approximately 10 days. During pumping operations, the ash sludge was to be pumped from the sludge pond via hydraulic pump to a mix tank located in the containment area. This mix tank was used to create a consistent slurry to aid in chemical conditioning. From the mix tank, another hydraulic pump was used to pump the slurried sludge into the Geotube® containers. Prior to the Geotube® containers, the Solve 137 emulsion polymer was injected in-line via the WSLP-1000-V2 polymer make-down unit. The WaterSolve technician monitored the chemical conditioning and made changes as needed. The treated ash sludge was then pumped into the Geotube® containers, where the solids were captured and the clean filtrate was returned back to the wastewater plant. The Geotube® containers were pumped to their maximum fill heights and allowed to dewater down to a point where pumping could be continued. Pumping into the Geotube® containers was done until all containers were completely filled. The Geotube® containers were successful in capturing and dewatering the ash sludge in this project.

Case study 1

The Geotube® containers were placed in roll-off boxes to control the filtrate.

Case study 2

An MDS Geotube® container being filled with ash sludge.

Case study 3

This lined pond contained the ash sludge that needed to be removed.

Case study 4

A sample of treated ash sludge taken prior to entering the Geotube® containers. It has great water release, clarity, and flocculation.

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WaterSolve’s March 2015 Newsletter – Testing Services

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WaterSolve’s October 2014 Newsletter – Case Study of the Month

Case Study of the Month

Castorland, NY Wastewater Treatment Plant Improvements

A small village in upstate New York needed to update their wastewater treatment system.  This project consisted of closing the two existing waste lagoons and constructing a new treatment facility with two smaller, more efficient lagoons. WaterSolve, LLC was contracted to chemically treat the wastewater that was to be dredged out of the old lagoons and dewater it using Geotube® Containers.  WaterSolve’s Chemical Control and Tracking System (CCTS) was utilized for this project. Polymer feed rates were automatically adjusted based off of readings from the flow and density meters.  The dredging of the lagoons was completed under separate contract.

Initial estimates based off of lagoon sampling that was completed by others indicated that the solids from both lagoons would be contained in 256’ of 45’ circumference Geotube® containers.  Soon after the dredging began, it was apparent that there were a lot more solids in the lagoons than previously estimated. From the CCTS daily reports and our own lagoon sampling, WaterSolve, LLC was able to accurately determine the volume of the remaining sludge and quickly deploy the additional Geotube® containers and resources to the site.

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A look at the inside of the CCTS trailer.

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The first three Geotube® containers were deployed.

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Clear filtrate exiting the Geotube® containers and is returned to the lagoon.

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Additional Geotube® containers were deployed to contain the remaining sludge.

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A sample jar of the residual treated with Solve 216B. It has great water release, clarity, and flocculation.

 

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WaterSolve’s October 2014 Newsletter – Custom Sized Geotube® Containers

Product Spotlight

Custom Sized Geotube® Containers

Geotextile container dewatering technology is a high volume, high flow containment option. This provides operators with an efficient on-site, cost effective dewatering option that requires only limited special equipment or permitting, low operations and maintenance costs.  With the addition of chemical conditioning agents, excess water drains from the container through the geotextile resulting in filtrate water that can be discharged or returned to the plant. Volume reduction within the container allows for repeated filling of the geotextile container. After the final cycle of filling and dewatering, retained materials continue to consolidate by desiccation because residual water escapes through the geotextile fabric. Excavation of the dried materials and subsequent disposal occur when retained solids meet dryness goals or when land application (or disposal) is practical or permitted.  It should also be noted that excavation and disposal may be deferred to a more economically feasible time.

Geotextile containers can be manufactured to fit almost any geometry or configuration, including existing drying beds.  As long as the drainage system in the drying bed is capable of handling the filtrate flow from the geotextile container, the drying beds will typically be able to handle significantly more material and will typically result in more effective dewatering.  Most drying beds are designed to hold only 1 to 2 feet of conditioned residuals.  Depending on the size of geotextile container, the height can be expanded significantly, typically to 6.5 to 8.0 feet.  Other advantages of geotextile container dewatering, compared to typical drying bed operation include:  effective operations in any weather conditions, potential for increased flow rates to the beds, greater volume reduction, and increased solids concentration in the dewatered residual.  In most cases, the existing piping to the drying beds can be easily retrofitted to accommodate the geotextile containers.  Many wastewater treatment facilities using drying beds also have polymer feed systems that can be used without modification.

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Custom Geotubes 1

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Drying beds are not the only applications where custom sized Geotube® Containers are commonly used.  Constraints on the size of dewatering pads, specific available space inside structures, and other constraints often require custom design and sizing.

Custom Geotubes 4

If you have a specific application for a custom sized Geotube® Container you would like to discuss, please contact us.

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TenCate Carbon Footprint Comparison

In response to the increasing awareness of the positive environmental aspects of geosynthetics and geosystems, TenCate Geosynthetics has developed the TenCate Geotube® Carbon Footprint calculator for use with dewatering applications. This CO2 footprint calculator provides water management customers with background information on several sustainability aspects.  Read more below.

Carbon Footprint Brochure v2

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WaterSolve’s July 2014 Newsletter – Standard Laboratory Testing

How We Can Help You

Standard Laboratory Testing

One of the keys to a successful dewatering project is the development of the most effective chemical conditioning program.  In this issue, we will focus on the testing typically completed in WaterSolve’s laboratory to determine the most effective chemical product(s) and dose(s) for a dewatering project using Geotube® containers.  While every application is different, WaterSolve has developed and refined our proprietary testing methods and reports to provide the information you need to determine if the application is a good fit for Geotube® Dewatering Technology.  Once it is determined that the technology is suited for your application, the testing will provide the most effective chemical conditioning program, which will consist of one or more products at prescribed dose(s).

The first step is completion of the “Standard Sample Chain of Custody.”  This form allows us to log and track each sample received and provides information on the type of application you are considering.  This form is either submitted with the sample or separately prior to the sample arriving at our laboratory.

The solids concentration of the sample is determined based on standard methods.  In many cases a volumetric dilution is completed to simulate the removal method or because it is necessary for proper dewatering.  In some cases, multiple dilutions are tested to determine the optimal dilution or the range of treatment.

Small samples are then tested using several different products and combination of products.  The best performing products or combinations are then further tested for other parameters, such as water release, water clarity, shear sensitivity, filtration capability, etc.  This testing is typically completed by conducting Rapid Dewatering Tests (RDTs) or Cone Tests.  These tests both involve passing known volumes of conditioned sample through the GT500D fabric with the filtrate release documented over time.  The solids captured and the filtrate released are then tested for total solids, total suspended solids or turbidity, and other parameters as appropriate for the specific application.  In some cases, an unconditioned sample can be compared with the conditioned sample as well.

From the testing described above, the most effective chemical conditioning program can be recommended.  The information is presented in a comprehensive report with data, photographs, tabulation of results, and recommendations.

We cannot emphasize enough the importance of proper testing by an experienced technician.  The chemical conditioning is most often an integral part of the Geotube® Dewatering system and is critically important to the overall success of the dewatering application.  When the application is pending, we typically complete this testing at no cost.  For study phase projects, we charge a fee for this service.

In future issues, we will discuss additional testing that can be completed to estimate certain operational parameters.  If you would like to discuss any testing needs, please contact us.

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WaterSolve’s July 2014 Newsletter – Case Study of the Month

Case Study of the Month

Troy Risk, Inc.

Pond Close Out | Auburn, IN

The four ponds making up a wastewater treatment system at this industrial site in Indiana were no longer in service and had to be decommissioned. The consulting firm in charge of the project contracted WaterSolve, LLC to remove the water and solid residual from the ponds. WaterSolve’s objectives were to slurry the residual and pump it into Geotube® containers for dewatering and solids consolidation. The residual was treated with a flocculating polymer to enhance dewatering and accelerate the dry-down of the solids. Filtrate water exiting the Geotube® containers was metered and pumped into the city’s sewer system. The captured solids consolidated in the Geotube® containers, passing a paint filter test prior to landfill disposal.

WaterSolve, LLC used  a 6” hydraulic pump to remove the residual and water from the ponds. Two 2” trash pumps with fire hoses were used to inject water into the residual to make it flow to the hydraulic pump. A model WSLP-2400 Polymer Make-down Unit diluted the Solve 216B flocculant and injected it into the residual prior to the Geotube® containers. A sample port installed prior to the Geotubes® provided visual inspection of the polymer treatment and adjustments were made to the polymer feed rates based on these observations. Filtrate water was transferred from the Geotube® containment area with a 6” diesel pump to the municipal sewer system at a prescribed flow rate. The residual slurry was pumped at 500-gpm with Solve 216B polymer being injected at 2 to 6-gph. The project was completed in 14 work days from start to finish with approximately three million gallons of slurry pumped to three Geotube® containers. The city’s wastewater manager came to the site several times and reported there was no issue with the water he was receiving from the site.

Figure 1

This photo of one of the ponds was taken prior to removing the water and residual.

Figure 2

This is the same pond after the residual was removed.

Figure 3

This 6″ hydraulic pump was lowered into the first pond as the project began.

Figure 4

The Geotube® containers are dewatering very well in the containment area designed and drawn by WaterSolve.

Figure 5

A sample jar of the residual treated with Solve 216B.  It has great water release, clarity, and flocculation.

 

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TenCate Geosynthetics publication awarded by Institution of Civil Engineers

The Institution of Civil Engineers (ICE) in the United Kingdom has awarded TenCate Geosynthetics for the article “Modelling the geotextile tube dewatering process” in Geosynthetics International Magazine. This publication was chosen as one of three best papers.

Read the article here.

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