Assessment of five technologies for mitigating arsenic in bangladesh well water
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ASSESSMENT OF FIVE TECHNOLOGIES FOR MITIGATING ARSENIC IN BANGLADESH WELL WATER. ETV-AM Environmental Technology Verification – Arsenic Mitigation Based on an Agreement Between the Governments of Canada and Bangladesh Funded by CIDA (Canadian International Development Agency)

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Assessment of five technologies for mitigating arsenic in bangladesh well water l.jpg
ASSESSMENT OF FIVE TECHNOLOGIES FOR MITIGATING ARSENIC IN BANGLADESH WELL WATER

ETV-AM

Environmental Technology Verification – Arsenic Mitigation

Based on an Agreement Between the Governments of Canada and Bangladesh

Funded by CIDA (Canadian International Development Agency)

A Four Year Program Delivered by

Ontario Centre for Environmental Technology Advancement www.oceta.on.ca


The etv am process l.jpg

Technology Screening BANGLADESH WELL WATER

Technology Specific Test

Technology

With Sufficient

Field Data

Acceptance of

Technology

Specific Test Plan

Field Testing

(Provisional Verification

Report>>Government of Bangladesh)

Rejection of Performance Claims

Provisional Verification

Technical

Advice from

ETV-AM

Deployment

Supervised by

ETV-AM

Monitoring

  • Bacteriological Findings

  • Waste Issues

Final

Verification Report

(Arsenic)

  • Social Issues

  • Fiscal Outcomes

Recommendations to the

Government of Bangladesh

The ETV-AM Process

  • Screened 25/35 vendor technologies

  • Selected 5 technologies

  • None of the proponents

    had sufficient scientific test data for verification of performance claims.

  • ETV-AM field tested each technology at 5 wells in Bangladesh


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Field Test Methodology BANGLADESH WELL WATER

Preparation

SITES: 5 hydrogeologically different regions in Bangladesh

TSTPs: Technology-Specific Test Plans

WELL CHARACTERIZATION: Chemical analysis of wells to identify water matrices that challenge the proponent’s performance claims.


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Execution of Field Tests BANGLADESH WELL WATER

  • Field test goal: Show what volume (liters) of water the technology unit can produce, until media breakthrough, meeting the Bangladesh drinking water standard of < 50 ppb for total arsenic

  • 20 day1verification test:

  • At/near maximum production rate, until breakthrough, or until the end of 20 days

  • Influent and effluent is analysed

  • Waste is analysed for chemical data and estimated volume

  • 1Testing duration was extended, in some cases, to reach media exhaustion


  • Quality control l.jpg
    Quality Control BANGLADESH WELL WATER

    • Testing agencies trained

    • Round robin testing of laboratories

    • Chain of custody used

    • Sample preservation temperature and time met

    • Blind and duplicate samples – QC testing

    • Reference laboratories used

    A Canadian lab QA/QC expert retained by ETV-AM concluded that the local labs performed the analyses satisfactorily.


    Slide6 l.jpg

    Third Party Verification BANGLADESH WELL WATER

    CHECKLIST: Performance Claim and Supporting Information

    • Operating principles of the technology are described and have a sound scientific basis

    • The parties involved in the project are technically qualified and independent of each other – this applies to the proponent, the test agency, the analytical laboratory and the verification entity.

    • The test data is credible and complete, with evidence of compliance with the QA plan and the TSTP (Technology Specific Test Plan)

    • Verification applies to the individual technology operated at the individual well, with its specific water characteristics. For these operating conditions, only, the effluent arsenic data is used to derive the media lifespan [cumulative volume of treated water]. This Performance Claim is proven statistically, at the 95% confidence level.

    • When these conditions are met, the performance claim is said to be verified.

    • In addition, on the basis of expert judgment rather than statistically-based proof, additional observations are made on performance characteristics.


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    Summary Table of Performance BANGLADESH WELL WATER

    and Technology Cost



    Verification l.jpg

    SONO 45-25 Verified Performance Statement: BANGLADESH WELL WATERFor the well locations cited in Column 1, the SONO 45-25 Technologywas able to produce the cumulative liters of water cited in Column 2, with 95% confidence, to below 50 ppb.EFFLUENT | INFLUENT

    Verification


    Verification10 l.jpg

    SIDKO Verified Performance Statement: BANGLADESH WELL WATERFor the well locations cited in Column 1, the AdsorpAs® Granular Ferric Hydroxide Technologywas able to produce the cumulative liters of water cited in Column 2, with 95% confidence, to below 50 ppb.EFFLUENT | INFLUENT

    Verification


    Verification11 l.jpg

    MAGC/ALCAN Verified Performance Statement: BANGLADESH WELL WATERFor the well locations cited in Column 1, the MAGC/ALCAN Technologywas able to produce the cumulative liters of water cited in Column 2, with 95% confidence, to below 50 ppb.EFFLUENT | INFLUENT

    Verification


    Verification12 l.jpg

    READ-F Verified Performance Statement: BANGLADESH WELL WATERFor the well locations cited in Column 1, the READ-F Technologywas able to produce the cumulative liters of water cited in Column 2, with 95% confidence, to below 50 ppb.EFFLUENT | INFLUENT

    Verification


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    General Findings from the Field Tests BANGLADESH WELL WATER

    • Where a technology did not reach breakthrough in the 20 day test, and the last data point was < 50 ppb, the media lifespan is undetermined, and indicated by > (…liters)

    • All technologies removed arsenic to < 50 ppb, providing at least 45 liters in a 12 hour day [cooking and drinking water for a rural family of 5]

    • However, most technologies did not meet their stated performance claims for media life.

    • Groundwater composition, e.g. phosphate concentration, had a significant effect on the media life of a given technology.

    • None of the spent filter media can be classified as hazardous waste according to the US-EPA guideline. Tests included :

      • -Toxicity Characterization Leaching Procedure (TCLP)

      • -Dutch Total Available Leaching Procedure (TALP) Modified Version (modified TCLP with rainwater)


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    The Provisionally Verified Arsenic Removal Technologies BANGLADESH WELL WATER

    Sono 45-25

    Sidko

    MAGC/ALCAN

    READ-F


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    The Provisional Verification Certificate BANGLADESH WELL WATER

    • Issued by BCSIR* to a Proponent that passes field testing and verification

    • Certifies that a specific technology has been field tested under the ETV-AM Program, and its performance is verified.

    • States that technology must be deployed under the terms and conditions stated in the Condition for Deployment.

      • The conditions for Deployment are provided on the back of the Certificate itself.

    • *BCSIR Bangladesh Council for Scientific and Industrial Research is the government appointed Verification Entity. ETV-AM has a mandate to build capacity in Bangladesh, and is assisted by Dhaka-based expert advisors.


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    Provisional Verification BANGLADESH WELL WATER

    Successful proponents will be permitted to sell their technology in Bangladesh initially on a “provisional” basis, for 2 years.

    Purpose of Provisional Period: To allow for a period of technology monitoring, under a range of well water conditions, and for a longer period, prior to conferring “ full” verification


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