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Decentralized Wastewater Workshop Greenville, South Carolina

Decentralized Wastewater Workshop Greenville, South Carolina. July 30, 2009. Land Disposal of Treated Wastewater Treatment & Disposal Options Overview. Secondary Treatment Treatment Method Options. Tertiary Treatment Treatment Method Options.

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Decentralized Wastewater Workshop Greenville, South Carolina

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  1. Decentralized Wastewater Workshop Greenville, South Carolina July 30, 2009

  2. Land Disposal of Treated WastewaterTreatment & Disposal Options Overview

  3. Secondary TreatmentTreatment Method Options

  4. Tertiary TreatmentTreatment Method Options

  5. Secondary Treatment OptionsOrencoAdVantexRecirculating Packed-Bed Media Filter

  6. Secondary Treatment OptionsAqueonics Multi-Stage Trickling Filter

  7. Secondary Treatment OptionsAquapointBioclere Modified Trickling Filter

  8. Secondary Treatment OptionsPuraflo Peat Fiber Biofilter

  9. Secondary Treatment OptionsRecirculating Sand Filter (RSF)

  10. Secondary Treatment OptionsExtended-Air Activated Sludge Plant

  11. Secondary Treatment OptionsClearstream ATU

  12. Secondary Treatment OptionsSBR

  13. Secondary Treatment OptionsPurafloPuraMax MBBR

  14. How to Select the Right SystemDecision Process Overview

  15. Individual Lot Conventional Drain FieldSystem Summary • Std. Septic Tank & Stone Drain Tile Field • Drain field requires cleared land w/ < 10% slope. • 3,000 sq ft active drain field + 50% repair area • Approx. Unit Cost = $4,000 - $5,000 per lot.

  16. Individual Lot Drip IrrigationSystem Schematic

  17. Individual Lot Drip IrrigationSystem Summary • Std. Septic Tank + Secondary & Tertiary Treatment. • Subsurface drip field requires un-cleared land w/ < 33% slope. • 2,000 sq ft drip field + no repair area. • Approx. Unit Cost = $25,000 - $28,000 per lot. • Requires 110-volt power supply + telephone line. • Requires routine maintenance @ approx. $600/yr.

  18. Individual Lot Drip IrrigationSystem Cost(City of Austin, TX)

  19. Individual Lot Repair SolutionCamden County, NCAdVantex Pre-Treatment & Sand Mound Disposal over Sand Line Trench

  20. Communal Drain FieldSystem Overview • 100-Lot Subdivision, Avg. 3-BR, in Upstate • Primary Treatment • 0.4 GPD/Sq Ft LTAR • Requires 6.9 acres of Active Drain Field plus additional 3.4 acres for 50% Repair Area • HOA Ownership (excluding Collection System) • Permitting by DHEC-Bureau of Environmental Health (up to 50,000 GPD +/-) • Approx. Unit Cost = $5,000 - $6,000 per lot

  21. Communal Drain FieldCottageville Elem School

  22. Communal Drip IrrigationSystem Overview • 100-Lot Subdivision, Avg. 3-BR, in Upstate • Primary & AdVantex Secondary Treatment • 0.2 GPD/Sq Ft LTAR • Requires 4.1 acres of Subsurface Drip Field & No Repair Area • Requires Routine O&M • Requires Utility Ownership • Permitting by DHEC-Bureau of Water • Approx. Unit Cost = $18,000 - $20,000 per lot

  23. Ralph Chandler Middle SchoolSurface-Drip Irrigation SystemDecision Process

  24. School Surface-Drip IrrigationSystem Overview • New Ralph Chandler Middle School at Fork Shoals - Orenco Recirculating Media Filter Treatment - 6-Acre GeoFlow Surface-Drip Irrigation Disposal - 0.1 – 0.2 GPD/Sq Ft LTAR - 250,000 Gal (2 weeks) Treated Effluent Storage - 15,900 GPD Design Flow - 4 Groundwater Monitoring Wells - $1.6 Million Construction Cost - Contract Operator – All Seasons Environmental Laboratories - Orenco Vendor Oversight Operations Contract - AQWA

  25. School Surface-Drip IrrigationEQ Tank, Recirc Pumps, & Treated Effluent Storage

  26. School Surface-Drip IrrigationAdVantex Treatment Pods

  27. School Surface-Drip IrrigationIrrigation Pumps & Disc Filter

  28. School Surface-Drip IrrigationSurface-Drip Irrigation Field

  29. Wrap-Up ….What Makes a DecentralizedSystem Successful? • Suitability of Site & Sustainable Loading Rate. • Proper Application of Treatment & Disposal Methods Selected. • Good Design. • Good Installation. • Good O&M. Thanks for your attention ….

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