1 / 16

ASSESSMENT OF FIVE TECHNOLOGIES FOR MITIGATING ARSENIC IN BANGLADESH WELL WATER

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)

manon
Download Presentation

ASSESSMENT OF FIVE TECHNOLOGIES FOR MITIGATING ARSENIC IN BANGLADESH WELL WATER

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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

  2. Technology Screening 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

  3. Field Test Methodology 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.

  4. Execution of Field Tests • 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

  5. Quality Control • 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.

  6. Third Party Verification 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.

  7. Summary Table of Performance and Technology Cost

  8. Summary Table of Performance and Technology Cost

  9. SONO 45-25 Verified Performance Statement: For 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

  10. SIDKO Verified Performance Statement: For 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

  11. MAGC/ALCAN Verified Performance Statement: For 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

  12. READ-F Verified Performance Statement: For 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

  13. General Findings from the Field Tests • 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)

  14. The Provisionally Verified Arsenic Removal Technologies Sono 45-25 Sidko MAGC/ALCAN READ-F

  15. The Provisional Verification Certificate • 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.

  16. Provisional Verification 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

More Related