Ecosol Cartridge Filter

The EcosolTM Cartridge Filter Cartridge Filter (at-source/in-line/off-line tertiary solution) provides within one compact system not only primary treatment but also secondary and tertiary treatment of pollutants conveyed in stormwater flows.

Ecosol Best Management Practice  Ecosol Cartridge Filter Ecosol environmental best management practiceIncreasingly stringent environmental best management practice requires planners and developers to apply a fit-for-purpose treatment-train approach to stormwater treatment to achieve today’s water quality objectives (WQOs). To respond, Ecosol in consultation with its industry partners developed an innovative treatment solution the EcosolTM Cartridge Filter.

The EcosolTM Cartridge Filter addresses a gap in the stormwater treatment technology market.  All current stormwater treatment cartridge systems remove particulate bound contaminants and fail to remove the colloidal and dissolved load, especially in the case of nutrients and heavy metals. The EcosolTM Cartridge Filter is designed to economically filter particulate bound contaminants, oil and grease as well as dissolved contaminants (inclusive of heavy metals and nutrients such as nitrogen and phosphorous) to meet stringent water quality targets.

Ecosol-Cartidge-Filter-Sideview  Ecosol Cartridge Filter Ecosol Cartidge Filter SideviewThe system has been designed to carry out multiple treatment processes on stormwater runoff within the one device.  In particular it is designed to remove, at pre-determined treatable flows, particulate, dissolved and in some cases colloidaly bound contaminants such as:

  • suspended solids
  • heavy metals
  • oil & grease
  • hydrocarbons
  • nitrogen and
  • phosphorous.

In developing this innovative stormwater treatment system careful consideration has been given to durability, longevity, cost, and maintainability.  Key commercial technical features include:

  • widely available chemically conditioned filter medias
  • a system capable of achieving low discharge levels
  • low visual impact and energy footprint
  • designed hydraulics with proven performance and longevity
  • scalable design and
  • cost effective maintenance regime.
  • treats 100% of flows up to its designed TFR
  • total treatment train system within the one compact underground unit
  • efficiently removes Gross Pollutants TSS, TP, TN and heavy metals
  • self-contained reducing on-site installation time
  • visually unobtrusive in underground pit
  • easily cleaned using an eductor truck

Key features

The EcosolTM Cartridge Filter is a fully self-contained modular system supplied to site ready to install thereby reducing onsite construction lead-times and disruption to the general public.

Two distinctive systems are available as compact, total treatment train systems incorporating primary, secondary and tertiary treatment within the one underground device.  The first (the ECF At-Source System) is designed specifically for at-source treatment of stormwater pollutants and the second (the ECF Off-Line series) is designed for treatment typically of the 1 in 3 month to 1 in 1 year ARI stormwater flows.

The EcosolTM Cartridge Filter has many features and benefits, some of which are listed below:

Ecosol Cartridge Filter Cartridge Filter Key Features Table R1 2015

Operation & Applications

Two distinctive systems are available as compact, total treatment train systems incorporating primary, secondary and tertiary treatment within the one underground device.  The first (the ECF At-Source System) is designed specifically for at-source treatment of stormwater pollutants and the second (the ECF Off-Line series) is designed for treatment typically of the 1 in 3 month to 1 in 1 year ARI stormwater flows.

The EcosolTM At-Source Cartridge Filter

The ECF At-Source system is designed specifically for field inlet applications. Ideally suited on smaller catchments such as commericial car parks applications with inlet flows ranging from 10 – 16 L/s, it provides a compact cost efficient at-source treatment solution specifically targeting suspended solids, heavy metals, total phosphorous and nitrogen including free floating oils and grease. Housed in a pre-cast concrete pit, it consists of a primary treatment inlet litter basket designed to capture and retain all particles larger than 200 micron, then incorporates series of internal baffles for retention of hydrocarbons in a spill situation and the retention of particles larger than 93 micron then includes the unique patented StormDMTTM multi barrier cartridge filter for tertiary treatment. 

The EcosolTM Off-Line Cartridge Filter Series

This unique cartridge filter series is designed to remove the above described particulate dissolved and colloidally bound contaminants from stormwater flows using a multi chamber system and incorporates the unique, patented multi barrier StormDMTTM cartridge filter.  The system consists of an underground pre-cast concrete chamber that houses the individual cartridges.  The system is unique in that it also includes a primary treatment litter basket, hydrocarbon retention baffle and fore bay chamber consisting of a baffle system to provide detention and settling of sedimentation prior to flows entering the cartridge filter chamber for further tertiary treatment.  This system is ideally suited to medium to larger catchments with inlet flows ranging from 19 – 88L/s depending on the number of cartridges.  In essence the system provides a complete treatment train approach within one compact underground tank incorporating the following elements:

Primary Treatment
During a storm event, runoff conveying pollutants is diverted (off-line) to the EcosolTM Cartridge Filter where gross litter is pre-screened and retained within the primary treatment litter basket. 

The primary treatment chamber consists of a removable stainless steel 304 grade litter basket lined with a 200 micron media.  It is designed specifically to capture and retain in a dry state all pollutants larger than 200 micron.

Secondary Treatment
Flows are then diverted under a baffle in the fore bay chamber.  Within this chamber finer solid particulates will settle out and any free floating oils and grease will attach to the removable perforated stainless steel baffle which consists of a hydrocarbon filter media. 

This media has been specifically designed to absorb and retain hydrocarbons within its unique structure.

Additionally oil separator alarm devices can be fitted to achieve class 1 separator compliance.

Tertiary Treatment

The pre-treated stormwater then flows through a series of flow dissipating baffles into the tertiary treatment chamber.  The pre-treatment of incoming stormwater flows, significantly enhances the performance and operational life of the cartridge filter as only fraction of finer particles <93 micron and dissolved pollutants are released into the tertiary treatment chamber at predetermined flows. The pre-treated stormwater runoff cross flows through the cartridge filter media into the central perforated pipe where flows are then diverted to an underfloor pipe and discharged into an outlet chamber within the unit.

The StormDMTTM cartridge(s) comprises of the following three filtration medias:

  • Porous Polypropylene – is designed to remove fine solids, oil & grease, and particulate bound contaminants aiming to protect and increase the lifespan and performance of the downstream filter media;
  • Chemically conditioned Clinoptilolite – is designed to remove mainly positively charged dissolved contaminants and in some cases colloidaly bound contaminants. In particular heavy metals such as mercury, cadmium, chromium, nickel, zinc, copper, lead and nutrients such as ammonium nitrogen;
  • Laterite – is designed to remove negatively charged dissolved contaminants. In particular heavy metals such as arsenic and nutrients such as nitrate nitrogen and phosphate. In addition this layer functions as a final polishing step to achieve stringent discharged limits in regard to heavy metal concentrations.
 
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The StormDMTTM cartridge addresses a gap in the stormwater treatment technology market. All current stormwater treatment cartridge systems remove particulate bound contaminants but fail to successfully remove the colloidal and dissolved load, inclusive of nutrients and heavy metals.

One of the great advantages of the StormDMTTM cartridge is its flexibility. A tailored cartridge arrangement with specific layer characteristics can be provided to accommodate site specific requirements.  For example, if there is a need to target the removal of copper, zinc and/or lead then the Clinoptilolite layer can be designed thicker than the other two layers. Alternatively, if arsenic or phosphorous is a key focus then a thicker laterite layer can be incorporated. This tailored solution achieves higher performance and ensures longer cartridge operational life.

 

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Under Construction

 

Key Dimensions

The EcosolTM Cartridge Filter product range has been designed to meet today’s stringent water quality objectives.  Whether installed at-source, in-line, off-line or end-of-line the system is adaptable to most applications, providing a minimum 300mm to 925mm hydraulic drop through the system is available depending on the product selected. The tables below highlights the key dimensions for the range of EcosolTM Cartridge Filters.

The EcosolTM At-Source Cartridge Filter

Key Product Dimensions and Treatable Flow Rates

The below table provides key product overall dimensions and information on the minimum drop required through the system to accommodate this unit within the drainage design for your project.  The indicative catchment areas detailed below are based on a 50% fraction impervious catchment and a Melbourne climatic dataset.

1 Dimensions and weights shown are subject to change depending on site specific conditions and are provided as a general guide only.

Product Pollutant Holding Capacities for the EcosolTM At-Source Cartridge Filter

The below table provides information on the indicative primary and secondary treatment chamber pollutant holding capacities for the EcosolTM At-Source Cartridge Filter.

1 Quoted hydrocarbon holding capacity excludes the absorbent holding capacity of the hydrocarbon baffle. Therefore additional capacity is available.

Cartridge Filter replacement media volumes for the EcosolTM At-Source Cartridge Filter

The below table provides general information of the typical StormDMTTM cartridge filter dimensions including media volumes required to re-activate the cartridge during scheduled maintenance works.

The EcosolTM Off-Line Cartridge Filter Series

Key Product Dimensions and Treatable Flow Rates

The below table provides key product overall dimensions and information on the minimum drop required through the system to accommodate these units within the drainage design. It also includes indicative pipe diameters and estimated treatable flow rates for the different sized units.  Again indicative catchment areas detailed below are based on a 50% fraction impervious catchment and a Melbourne climatic dataset. Refer to removal efficiencies tab on our website for further details relevant to your area.

1 Larger custom designed units are also available for increased treatable flow rates.  Additionally, media densities can be tailored to specifically cater for target pollutant concentrations.
2 Dimensions and weights shown are subject to change depending on site specific conditions and are provided as a general guide only.
3 Two piece unit supplied with a base unit and lower walls (950mm high) and upper wall section.
4 Two piece unit supplied with a base unit and lower walls (750mm high) and upper wall section.

Product Pollutant Holding Capacities for the EcosolTM Off-Line Cartridge Filter Series

The below table provides information on the indicative primary and secondary treatment chamber pollutant holding capacities for the EcosolTM Off-Line Cartridge Filter series.

Ecosol-Cartridge-Filter-Graph-6

1For catchments with expected high gross litter and coarse sediment (>200 micron) loadings it is recommended that the EcosolTM Litter Baskets be installed into any upstream inlet pits thereby increasing the total pollutant holding capacity for gross pollutants and also reducing primary treatment maintenance frequencies on the EcosolTM Off-Line Cartridge Filter system.

2Quoted hydrocarbon holding capacity excludes the absorbent capacity of the hydrocarbon baffle. Therefore additional capacity is available.

Cartridge Filter replacement media volumes EcosolTM Off-Line Cartridge Filter Series

The below table provides general information of the typical StormDMTTM cartridge filter dimensions including media volumes required to re-activate the cartridge during scheduled maintenance works. When replacing the cartridge filter media it is important to consult with your Ecosol representative to ensure the correct material is purchased and appropriately installed into the individual cartridges for optimal performance.

Removal Efficiencies

In recent years modern Water Sensitive Urban Design (WSUD) objectives and principles now applied to most urban development’s require more onerous water quality objectives (WQOs) specifically targeting the removal of suspended solids, nitrogen, phosphorus and heavy metals. The EcosolTM Cartridge Filter is designed to carry out multiple treatment processes of stormwater within the one compact modular system.  Primarily designed to remove solids, colloidal bound and dissolved contaminants it can play an integral role in reducing pollution in heavily-urbanised catchments that discharge to our waterways.

Ecosol Water Sensitive Urban Design
   

Pollutant removal efficiencies are based on typical urban catchment mean pollutant concentrations.  For catchments with higher pollutant concentrations or specific target contaminants please consult with your Ecosol representative to ensure an appropriately modelled unit is designed for your application.

1 Typical pollutant removal efficiencies for EcosolTM Cartridge Filter systems incorporating the Ecosol primary and secondary treatment chambers consisting of the EcosolTM Litter Basket and removable hydrocarbon baffle with absorbent filter media. Pollutant removal efficiencies based on independent testing and University of Adelaide peer review on the performance of the EcosolTM Litter Basket and published performance data.
2 Typical nitrogen and phosphorous removal efficiencies derived from international work undertaken on the performance of porous polypropylene, Clinoptilolite, and laterite as per references described in section 2.0 of the product technical specification manual.
3 Typical removal efficiencies derived from the Port of Townsville Pilot Program testing (Athanasiadis et al., 2014). The removal efficiency depends heavily on the arsenic speciation (arsenite or arsenate).
4 Typical removal efficiencies derived from the Port of Townsville Pilot Program testing (Athanasiadis et al., 2014)

Music Modelling Guidelines

These guidelines provide instruction to the creation and application of a treatment node for the EcosolTM Off-Line and At-Source Cartridge Filters for the Model for Urban Stormwater Improvement Conceptualisation (MUSIC).  The EcosolTM Cartridge Filter can be modelled in MUSIC using the Generic Treatment node to represent the results derived from independent laboratory testing and field testing by the University of Munich, GHD and the University of Adelaide (ENGTEST The school of civil, environmental and mining engineering).  The guidelines apply to the creation of the treatment node within MUSIC v6.0.4

Creating the node

Insert a Generic Treatment node into your model by selecting “Generic” under the treatment nodes menu. When the node is created the node properties dialog is displayed.  There are several changes that need to be made in this dialog.

The transfer function for each pollutant in the node can then be defined to meet the input and output values that reflect the capture efficiencies (CE) of the EcosolTM  Cartridge Filter (Table 1) up to the design TFR.

It is important to select the appropriate Treatable Flow Rate. To change the Treatable flow rate adjust the High flow bypass to the flow the unit can treat detailed in Table 2 (e.g. 10L/s = 0.010m3 as the high flow by-pass).  An Ecosol representative can assist you in selecting the most appropriately sized unit for your next project.

Table 1 -   EcosolTM Cartridge Filter – input and output values

Table 2-   EcosolTM Cartridge Filter – High Flow Bypass

Indicative system sizing information

The performance of the EcosolTM Cartridge Filter under different fraction impervious and climatic conditions is provided below.

Typical urban mean pollutant concentrations

The assumed urban mean pollutant loads (both particulate and dissolved) are outlined below.  These concentrations were adopted to validate the treatment performance and longevity of the StormDMTTM cartridge for each of the different configurations on offer.

Source: Taylor et al., Water research 39 (2005) and international literature

 

Hydraulics

Treatable Flow Rate (TFR) is defined as the maximum flow rate through the EcosolTM Cartridge Filter before the flow overtops the upstream by-pass overflow weir. TFR is constrained by the infiltration capacity (Hydraulic Conductivity) of the engineered StormDMTTM cartridge(s).

The total flow rate treated by the EcosolTM Cartridge Filter is determined by the number and size of cartridges installed.  Standard systems are available or Ecosol can custom design and build a system specific to your site requirements. The indicative catchment areas are based on a 50% fraction impervious catchment and a Melbourne climatic dataset.

Larger custom designed units are available for increased treatable flow rates.  Additionally, media densities can be tailored to specifically cater for target pollutant concentrations.

The EcosolTM Cartridge Filter incorporating the patented StormDMTTM multi-barrier cartridge filter as well as its three specific filter materials has been trialled in water, wastewater, and stormwater treatment applications around the world. The results obtained have been published in peer review journals and international conference proceeding’s. This section summarises the findings of these studies.

References

K. Athanasiadis, P., McFadyen, and M., Brennan. (2014): The use of StormDMT™ technology as a low cost solution to remove heavy metals from stormwater runoff. A bulk storage facility case study in Port of Townsville. OzWater’14 Australia’s International Water Conference & Exhibition, Brisbane QLD, Australia.

G. Collecutt (Sim Physics) (2014) CFD Flow Analysis of Ecosol Cartridge Filter Series. Computational Fluid Dynamics (CFD) to calculate pressure head loss and particle dropout fractions in the range of Ecosol Cartridge Filters.

Dr. F.P Nejad, Dr.A. Zecchin, A. Heathershaw (2014)  - Hydraulic Conductivity Testing on a new batch of media (Clinoptilolite) School of Civil Environmental and Mining Engineering. The University of Adelaide, 

S. Matsui, B.C., Lee, S Kimura, S. Kobayashi, K. Makita, T. Umeda, T. Matsuda, and Y. Shimizu. (2003): A new installation for road runoff treatment; Up flow filtration through porous polypropylene media. 31st Wastewater Technical Seminar, Report 175, Institute of Water Quality Control & Waste Management, Technical University of Munich, Germany, ISSN 0942-914X.

Maintenance

As with all filtration systems, the EcosolTM Cartridge Filter should be cleaned regularly. The cleaning frequency, and the cost, depends heavily on the surrounding environment, the unit’s proximity to a waste facility and the concentration and volume of pollution conveyed to the system.  However regardless of the system configuration the media requires exchange or regeneration.  This is essential in maintaining its operational efficiency.

The figures below give a broad guideline about the number of cleans required annually for each treatment element within the individual EcosolTM Cartridge Filter system.

Monitoring

Under normal weather and operating conditions, your EcosolTM Cartridge Filter should be checked a minimum of every two - three months depending on the quality and quantity of the inflow to the unit.  Initially, Ecosol recommends that monitoring is undertaken monthly. Once the unit has been in operation for an extended period of time (say, 24 months) then the monitoring schedule can be adjusted to reflect the actual operating conditions specific to the catchment.  Under normal operating conditions the Primary Treatment Basket and Sediment Chamber would normally require cleaning approximately every 3 months.

Cleaning and Maintenance Procedures

During the first two years of operation it is important to regularly monitor and maintain the system to ensure adequate ponding depth, infiltration rates and to better determine long-term maintenance regimes.  All elements within the EcosolTM Cartridge Filter have been designed for easy safe and cost efficient cleaning by vacuum method.  Please refer to the product maintenance guide for full cleaning and maintenance procedures.

 

Ecosol has a very competitive cleaning service. After each clean we provide a report detailing the volume and type of pollutants removed. We believe that it is in your best interests for Ecosol staff to clean and maintain the unit, not only because we are specialists, but also because proper monitoring and maintenance enhances the unit life significantly. Should you use another company to clean the unit, or undertake this work yourself, we request that it be conducted according to Ecosol’s specifications. Otherwise, you may invalidate your warranty, as damage caused by inappropriate cleaning procedures is not covered. The advantages of using Ecosol to clean and maintain your unit are that you get:

  • regular inspections of your unit;
  • a detailed report provided on completion of each clean;
  • trained and experienced staff; and
  • remedial work completed, if required.

Warranty and Life Expectancy

The EcosolTM Cartridge Filter has a two-year warranty covering all components and workmanship. Ecosol will rectify any defects that fall within the warranty period. The warranty does not cover damage caused by vandalism and may be invalidated by inappropriate cleaning procedures or where the unit is not cleaned with the recommended frequency. The stainless-steel primary treatment litter basket, removable hydrocarbon baffle and cartridge filters have a life expectancy of 20 years and the pre-cast concrete pit has an estimated 50-year life span.

 
 

 

Applications

The EcosolTM Cartridge Filter provides a cost effective and efficient system for removing stormwater contaminants such as nitrogen, phosphorous and heavy metals both in particulate and soluble forms.  The system is capable of achieving low pollutant discharge levels and also has the flexibility to target contaminants specific to site requirements meeting a range of permit licences.

Installed underground the system has a low impact footprint for both retrofitting and new development applications.  Most residential, commercial and industrial developments today are designed using Water Sensitive Urban Design (WSUDS) to achieve annual pollutant load reductions.

The application of the EcosolTM Cartridge Filter provides a compact easy to install solution. As a modular precast concrete unit, it is supplied to site with all internal components pre-factory fitted ensuring simple on site installation of the unit. 

It has a range of applications including:

  • Mining and bulk handling facilities;
  • Industrial and commercial sites such as car parks and shopping centres; and
  • Ecosol At-Source Cartridge Filter components
  • High density residential housing developments.

The ECF At-Source is designed specifically for field inlet applications. Ideally suited for small commercial car park applications with inlet flows ranging from 10 - 16 L/s, it provides a compact cost efficient at-source treatment solution. 

The EcosolTM Off-Line Cartridge Filter Series has been designed specifically to cater for typical high density urban catchments where space limitations require a compact underground treatment solution. 

Genrally the system is installed off-line diverting a predetermined flow rate to the system for treatment.  The system is unique in that it also includes a primary treatment litter basket, hydrocarbon retention baffle and fore bay chamber consisting of a baffle system to provide detention and settling of sedimentation prior to flows entering the cartridge filter chamber for further tertiary treatment.  This system is ideally suited to medium high density catchments with inlet flows ranging from 19 – 88L/s depending on the number of cartridges installed.  In essence the system provides a complete treatment train approach within one compact underground tank.

Total Turnkey Services

Ecosol’s design and estimating staff provide a dedicated management approach towards your project. In addition all staff are capable of liaising with the client, the consulting engineer, the contractor, and all other interested third parties to achieve a successful outcome.

Ecosol provides a complete turnkey service from design, manufacture and installation to cleaning and maintenance for its product range and prides itself on providing its client with a cost effective, efficient service.

Ecosol At-Source Cartridge Filter components

ECF Single

ECF Triple

EcosolTM Cartridge Filter Maintenance Guide

EcosolTM Cartridge Filter - Maintenance guide


EcosolTM Cartridge Filter Technical Specifications

EcosolTM Cartridge Filter - Technical Specifications


EcosolTM Cartridge Filter Conceptual Product Application Drawings

EcosolTM Cartridge Filter - Off-line ECF Double and Harvesting

EcosolTM Cartridge Filter - End-of-Line-ECF-Triple

EcosolTM Cartridge Filter - In-Line-ECF-Double-and-OSD-Tank

EcosolTM Cartridge Filter - In-Line-ECF-Double-Stormwater-Treatment-Plant

EcosolTM Cartridge Filter - In-Line-ECF-Single-and-Litter-Basket

EcosolTM Cartridge Filter - Off-Line-ECF-Double-and-Reuse

EcosolTM Cartridge Filter - Off-Line-ECF-Double-Main-Drain

EcosolTM Cartridge Filter - Off-Line-ECF-Quadruple

EcosolTM Cartridge Filter - Off-Line-ECF-Triple


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