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Project Example
 

Project Example

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    Project Example Project Example Presentation Transcript

    • World Bank Proof of Concept Project Proposal July 10, 2009
    • Project Objectives – Proposing options for dredging equipment and methodologies to improve the productivity and effectiveness of existing and new dredging operations. – Use new methods and technologies to define and map the appropriate hydrographic surveying of Taihu, in order to evaluate accurate dredge prisms. – Defining and capturing data required by The World Bank and the evaluation of the overall watershed and associated wetlands, including the use of natural and artificial filtering agents to better reduce the flow of pollutants into Meiliang Bay. – Providing significantly improved options for the management of sediments removed from the dredging operations.
    • Project Objectives – Reduce bacteria and coliform counts in the pilot lake water. – Providing significantly improved options for dewatering of the sediments. – Significantly improving the quality of water being returned to the lake by utilizing ClearBlue 104™ to reduce the bacteria and coliform in the discharge. – Recommending long range testing monitoring technologies to be used in the region. – Support Wuxi officials for the data and financial reporting requirements for The World Bank Wuxi Project. – Meet requirements date of March 2010 for The World Bank project.
    • Current Observations • Bacteria and coliform are a MAJOR problem in Lake Tai in our test water samples: – Bacteria counts are > 400 units per liter. – Coliform counts are ≥1300 units per liter – Fecal coliform counts are ≥ 220 units per liter • Dredging alone will not solve the issue of bacteria and coliform – Dredging alone may actually increase counts in the short term by stirring up additional suspended solids in the lake’s water columns. • Sediments are currently stored adjacent to the lake. • Untreated discharge water from dredging operations and sediments is running back into the lake. • The maps of the lake bottom are outdated and may not be sufficient for the current operations.
    • Primary Water Intake Locations for Wuxi
    • Static Test in Wutangmen near the Major Water Intake in Wuxi for 10 Days Largest of the dredging units we observed Algae bloomed at the test site (Wutangmen in Meiliang Bay) during the static test (April 20-30,2009)
    • ClearBlue 104™ Static Test Site Near the Major Water Intake in Wuxi
    • Reducing Algae Cell Counts Through Day 10 Provided by Wuxi Environmental Monitoring Centre
    • Improving Water Quality Results for Static Test Provided by Wuxi Environmental Monitoring Centre ClearBlue 104 Amt Total Total Fecal ppm pH Alkalinity Hardness Chl-a Bacteria Coliform Coliform Timing mg/l mg/l CaCO3 mg/l cfu/ml cfu/l cfu/l 0# C=0 ppm 8.00 96.3 154 0.011 400 1300 220 1# C=0.50 ppm 7.98 94.1 187 0.009 30 <20 <20 2# T=15 min 8.09 95.3 183 0.007 30 <20 <20 3# C=0.50 ppm 8.09 90.6 163 0.010 10 <20 <20 4# T=30 min 8.07 92.3 172 0.010 10 <20 <20 5# C=0.50 ppm 8.13 96.8 203 0.010 20 <20 <20 6# T=60 min 8.12 98.1 195 0.013 20 <20 <20 7# C=1.0 ppm 8.09 91.8 175 0.009 UDL <20 <20 8# T=15 min 8.05 93.6 188 0.011 UDL <20 <20 9# C=1.0 ppm 8.03 95.6 195 0.011 20 <20 <20 10# T=30 min 8.06 97.6 206 0.015 20 <20 <20 11# C=1.0 ppm 8.05 91.8 202 0.015 50 <20 <20 12# T=60 min 8.04 99.3 187 0.015 40 <20 <20 13# C= 1.25 ppm 8.00 91.1 165 0.016 UDL <20 <20 14# T=15 min 7.99 89.3 170 0.015 UDL <20 <20 15# C= 1.25 ppm 7.98 93.6 134 0.018 UDL <20 <20 16# T=30 min 8.00 91.1 139 0.018 UDL <20 <20 17# C= 1.25 ppm 8.01 89.6 206 0.015 UDL <20 <20 18# T=60 min 8.01 87.8 210 0.015 UDL <20 <20 Note: UDL – Under the Detection Limit
    • Project Overview • Scientifically improve and support ongoing efforts to improve water quality within Taihu and specifically in Meiliang Bay, including dredging, dewatering and mapping the defined pilot area(s). • Improve existing dredging operations performance: – Develop a systematic process for controlling and tracking dredged areas and volumes of sediment removed. – Develop dredge prisms, monitor performance of dredging operations, track hourly and daily volumes removed, and produce 3D maps of the dredged areas. – Utilize scientific methods such as GPS coordinates, depth soundings, volumetric calculations, and detailed mapping to produce a reliable documentation of dredging operations. • Scientifically define new areas to be targeted for future dredging operations.
    • Project Overview • Improve Dredge Performance (continued): • Evaluate and pilot improved methods and procedures for dewatering sediments, including gravity separation, sedimentation ditches, geosynthetic bags, hydro cyclones, centrifuges, presses, and other available technologies. • Test the dredged materials to evaluate concentration of contaminants and determine the most cost effective, environmentally-friendly dewatering methods to use in Taihu. • Reduce the total bacteria counts and algae present in the water being returned to the lake. • Injecting a minimal concentration (0.5 to 1.0 ppm) of ClearBlue104™ (CB104) into the water return lines. CB104 will effectively eliminate bacteria and significantly reduce the overall algae spore populations within the returned water, resulting in improved water quality throughout the areas
    • Project Overview • Scientifically improve sampling and analysis the sediments and lake water in the pilot test area. • Sediment samples will be analyzed for total phosphorous, ammonia, and biological oxygen demand. • Samples from the pilot test area will be analyzed for percent solids (water content), grain size, and organic content by muffle furnace to assist in determining the dewatering characteristics for the dredging cost estimate. • Lake water will be collected from within the pilot study area, prior to and during the pilot testing. • The water will be analyzed for pH, dissolved oxygen, turbidity, coliform bacteria, chlorophyll-a, and total suspended solids. • Assess the probable impact from removing the loose organic sediment, and treating the lake water prior to reintroduction from the Pilot Study, on the water quality in the lake.
    • Project Overview • A final report will be issued, and will include an assessment of the various methods used during dredging and dewatering pilot tests. • Present the dredging evaluation options, dewatering options, effectiveness of the dredging and CB104 applications, and recommendations for full scale implementation. • A rough-order-of-magnitude cost analysis and estimate will also be assembled so that Wuxi officials can make scientifically informed decisions on go-forward operations.
    • Helping Define Long Range Improvement in Taihu Important Questions The Project Will Answer • What does the sediment consist of? Solids %, Grain Size, Organic %, Specific Gravity, % Saturation. • Where is the natural bottom? Soft or hard material? Clay or sand or limestone? • How thick is the sediment or organic matter? • How quickly will the sediment / algae settle out of the water? • How will the sediment best dewater? • What can you do with the sediment once it’s removed from the Lake? • How much sediment and algae removed is there? • What is the water flow and current and predominant wind direction? • How best to keep track of dredged volumes and areas?
    • Project Preliminary Investigation • Determine the Volume of Sediment (Muck) for Removal • Determine the Settling and Consolidation Characteristics of the Muck • Prepare a Preliminary Design for a Confined Dewatering and/or Disposal Facility to Contain the Muck • Map of Test Core Locations • Review Core Logs • Review Pictures of Core Logs • Review Geotechnical Test Results from Cores • Review Geotechnical Test Results from Bulk Samples
    • For Example: Sample % Dry Organic Unit Weight Solids Content (lb/ft3) (%) Muck Top 5 67 65.9 Muck 8 53 68.1 Middle Muck 15 39 73.0 Bottom Marl 70 na 116.1
    • Project Examples
    • Settling and Consolidation Tests
    • On-Site Lab Set-Up
    • Dredging Where to focus efforts? Reliable survey required Hydraulic versus mechanical? Pilot procedures implemented Transfer methods to shore? Pumped versus hauled Speed and depth control? Real-time instruments on equipment
    • Accurate Mapping Critical
    • Survey Control for Volume Tracking
    • Mechanical Cutter Head
    • Transfer via Pump/Pipe
    • Dewatering Various Methods can be tested: • Settling Ditches - Gravity • Centrifuges – Centrifugal force • Hydrocyclones – Gravity and centrifugal force • Geotextile Bags – gravity and filtration • Filter Presses – pressure
    • Hydrocyclone Test
    • GeotubeTests
    • Dewatering via Geotubes
    • Filter Press
    • Water Intake Protection and Water Quality Improvement • As a critical first step, protect water intake areas by: • Creating dredge traps near intakes to “trap” sediment and algae • Inoculating water near intakes with CB104, to significantly reduce bacteria and algae spores in and around intake structures.
    • Suspended Solids in the Water Column Dredging will not have an impact on these moving solids Suspended Solids Water Current Lake Bottom Embedded Solids
    • Dredging Option to Trap Suspended Solids Dredge Trap Infuse Discharge Water Suspended Solids Water Current Embedded Solids
    • Pilot Project Cost Model
    • Implementation Schedule Note: It would be better if change a more clearer table
    • The Professional Consortium •China environmental consulting •Construction •Equipment Engineering •Investment expertise •Global environmental experience •Project design and management •Expertise in practical, creative de- watering and sediment remediation •Developer of ClearBlue 104™ •Patent holder of ClearBlue 104™ •Scientific oversight of the chemical
    • The Professional Consortium • Central Government coordination • China and USA logistics • Warehousing • Supply chain management • Inventory management technology • Project Design • Exclusive distributor of ClearBlue 104™ • Freight Forwarding • Project Design and Management