Project Objectives. Model Fate and Transport of Microcontaminants in AWT Effluent. Evaluate Advanced Wastewater Treatment through Pilot Testing
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1 ats507wr.ppt/1
2 Project Objectives Model Fate and Transport of Microcontaminants in AWT Effluent Evaluate Advanced Wastewater Treatment through Pilot Testing Determine AWT Effluent Toxicity Chronic Acute ats507wr.ppt/2
3 Reuse Also Means Environmental Stewardship Project Addresses Microcontaminant Concerns Related to Human Health and Environmental Impact Ethynyl estradiol Triclosan DEET ats507wr.ppt/3 Bisphenol-a surfactants They're in the Water... They Make Fish Change Sex... Endocrine Disruptors-What are they doing to you?
4 Fate and Transport of Microcontaminants is Being Modeled Simulated Injection of Microconstituents Photolysis of Organics Sorption of Organics Biodegradation of Organics AWT Facility ats507wr.ppt/4 Aquatic Organism Impacts Trace Organic Concentrations Estimated at Extraction Wells
5 Microcontaminants are Being Tracked Through Two AWT Configurations Primary Clarification Aeration Basin Second Clarification MBR RO UV Sampling locations of MBR train: MBR effluent RO brine RO effluent Primary Clarification Aeration Basin Second Clarification Tertiary Clarification Denitrification Filter UF RO UV Sampling locations of UF train: UF effluent RO brine RO effluent ats507wr.ppt/5
6 Preliminary Results for AWT Removal of Microcontaminants Show Promise RO effluent RO brine 0 Tris (2-chloroethyl) 2,6-di-tert- 4-Methylphenol 4-Nonyl Phenol Acetaminophen Alpha Chlordane Bisphenol A (BPA) Caffeine Caffeine Carbamazepine Carbaryl Chlorpyrifos DEET Diazinon Dieldrin Estrone Estradiol Ethinyl Estradiol -17 Fluoxetine Ibuprofen Iopromide Methyl Parathion Phenol Progesterone TDCPP Testosterone Triclosan Triclosan Trimethoprim Triphenylphosphate Tris (2-butoxyethyl) Microcontaminants (ng/l) Microcontaminants in RO effluent are below detection limits! ats507wr.ppt/6
7 Microcontaminant Concentrations and Effluent Toxicity are Being Correlated to Aquatic Organism Impact Hormonal Response Through Tissue Bioassays Acute Fish Toxicity Acute Water Flea Toxicity ats507wr.ppt/7
8 Results of Hormonal Response Through Tissue Bioassays (E-Screen) 0.2 Estradiol Equivalents (ng/l) MBR effluent RO effluent blank ats507wr.ppt/8 RO effluent didn t produce a significant response in MCF-7 cells, a breast cancer cell line that proliferates in response to estrogenic activity.
9 Results of Pilot AWT Effluent Toxicity Tests - test organisms waterflea, Ceriodaphnia dubia fathead minnow, Pimephales promelas EPA 821-R Test Method EPA 821-R Test Method ats507wr.ppt/9
10 MBR effluent shows minimal acute toxicity Survival (%) P. promelas on 10/29/07 P. promelas on 11/26/07 (dechlorinated) P. promelas on 1/14/08 (no chloramine added) C. dubia on 10/29/07 C. dubia on 11/26/07 (dechlorinated) C. dubia on 1/14/08 (no chloramine added) 0 100% 75% 25% 12.5% 6.25% 0% (control) MBR effluent concentrations relative to organism media No significant survival differences were observed on all test days, except for C. Dubia in 100% MBR effluent without de-chlorination on 10/29/07. ats507wr.ppt/10
11 RO effluent increases organism sensitivity to chlorine Survival (%) P. promelas on 10/29/07 P. promelas on 11/26/07 (dechlorinated) P. promelas on 1/14/08 (no chloramine added) C. dubia on 10/29/07 C. dubia on 11/26/07 (dechlorinated) C. Dubia on 1/14/08 (no chloramine added) 0 100% 75% 25% 12.5% 6.25% 0% (control) RO effluent concentrations De-chlorination on 11/27/07 significantly increased the survival of P. Promelas and C. Dubia. No significant survival differences were observed in P. Promelas or C. Dubia after complete removal of chloramine on 1/14/08. ats507wr.ppt/11
12 Summary The developed fate and transport model may be a valuable tool to track microcontaminants in wastewater effluents Reverse osmosis treatment shows promise for microcontaminant removal Chlorine residual plays significant role in AWT effluent acute toxicity to indicator organisms. Non-chlorinated AWT effluents show no signs of acute toxicity. ats507wr.ppt/12
13 Project Team Microcontaminant Research and Project Management - South Florida Water Management District and Carollo Engineers Pilot Plant Design, Operation, and Sampling - City of Plantation and Hazen and Sawyer Laboratory Work - Univ. of Florida at Gainesville (hormonal bioassays and toxicity), University of Wisconsin (hormonal bioassays), Montgomery-Watson Harza (trace organics), Golder (toxicity), Carollo (particle analysis) ats507wr.ppt/13
14 Project Team Microcontaminant Fate and Transport Modeling - DHI Water and Environment Expert Advisory Panel - Dr. Jorg Drewes, Membrane Treatment Processes Dr. Shane Snyder, Water Quality and Toxicology Dr. Erin Snyder, Toxicology ats507wr.ppt/14
15 ats507wr.ppt/15 End of Presentation
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