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Effective Strategies for Residual Polymer and Aquatic Toxicity Testing For Dredge Slurry Dewatering Western Dredging Association 2012 Midwest Chapter Randy Wilcox, Gregg Lebster WaterSolve , LLC Bruce Rabe Environmental Resource Management April 27, 2012. Introduction.
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Effective Strategies for Residual Polymer and Aquatic Toxicity Testing For Dredge Slurry Dewatering Western Dredging Association 2012 Midwest Chapter Randy Wilcox, Gregg Lebster WaterSolve, LLC Bruce Rabe Environmental Resource Management April 27, 2012
Introduction • Chemical Conditioning Basics • Residual Polymer in Return Water • Aquatic Toxicity Testing • Residual Polymer Testing • Case Studies
Chemical Conditioning • Determination of Objectives • Consolidation • Effluent / Filtrate characteristics • Removal of contaminates • Other objectives
Chemical Conditioning • Dewatering Chemicals • Organic Flocculants • Organic Coagulants • Inorganic Coagulants • Hybrid Chemistries
Chemical Conditioning • Description of Application • Inline Injection • Mixing Energy Requirements • Options for Automatic adjustment of feed rate • Adjustment based on visual observation
Preliminary Testing • Polymer Selection and Dose Determination (Jar Testing) • Larger Scale Test • Geotube Dewatering Test (GDT) • Hanging Bag Test • Pilot Scale Test
Aquatic Testing Basics • State Regulatory Requirements • Testing Requirements • Specific Test Objectives • Salinity • Test Species • Test Duration • Test End Points Fathead Minnow Daphnia magna
Aquatic Toxicity Testing • Sample Collection • Test Initiation • Solution preparation • Water quality • Organism Loading • Test Monitoring • Observations • Test solution renewal
Aquatic Toxicity Testing (cont.) • Test Determination • Survival • Growth • Reproduction • End point • Data Analysis / Statistical Evaluation
Residual Polymer Testing • Description of “China Clay” Test • Qualitative Test • Quantitative Test
Case Studies • Florida Keys Project • Southern Shores, NC Project
Questions? WaterSolve, LLC 4964 Starr Street, SE Grand Rapids, MI 49546 (616) 575-8693 (616) 575-9031 (fax) www.gowatersolve.com www.geotube.com