Building A Better Biosolids Future

A Brief History Sewage Treatment in Detroit  “ The Grand Sewer” 1836  The Fairview Sewer 1913  The Detroit WWTP 1940

A Brief History The Detroit Waste Water Treatment Plant  Primary Treatment Incineration of solids Disinfection of effluent  Secondary Treatment added in 1972 Aeration tanks Final clarifiers Cryogenic oxygen plants Additional sludge handling facilities

DWSD WWTP Today Serves more than 3 million people in 78 communities. The largest single-site wastewater treatment plant in the U.S. Budget over $100 million/year, 800 employees. Design Flow: 930 MGD, Peak Flow: 1720 MGD Effluent discharged to Rouge and Detroit Rivers Produces over 500 dry tons of solids per day

A System Showing its Age  Multi-Hearth Furnaces  Landfilling Ash and some solids  Million $$ upgrades necessary

Working to Upgrade Solids Management 2003 Synagro bought out Minergy. Synagro proposes conversion to a 25-year contract Detroit signed a 15-year, $25 million/yr, contract with Minergy Detroit LLC Nov 2007 Detroit city council approves contract awarding Synagro the management of a minimum of 73,000 dry tons of material per year.

Experience = Peace of Mind Pinellas, FL Sacramento, CA Hagerstown, MD Honolulu, HI Bronx, NY Baltimore, MD Back River WWTP Patapsco WWTP Current Synagro Projects DWSD WWTP

Interim Management Options 80% managed by Synagro

Incineration & Landfill INCINERATION  Fluidized bed technology  Lower operating temperatures and more complete combustion  More energy efficient  Lower air emissions LANDFILL  Back-up for land application  Ash dewatering and disposal

Land Application  Use and recycling – NOT disposal  Protection of Public Health  Protection of Surface and Groundwater  Aesthetic Concerns  Application in compliance with MDEQ Regulations

Where Land Application will occur Lenawee St. Clair Livingston Monroe Jackson Ingham Shiawassee Genesee Sanilac Lapeer Macomb Hillsdale Oakland Washtenaw Farmer interest high Spreading season ~ May-Dec., Landfilling in winter

Quality Equals Value Metals below EPA Part 503 Table 3 pollutant limits  Meet EPA Part 503 Class B Pathogen and Vector Attraction Reduction requirements  Used for agriculture & reclamation  Economic value $ 250/acre That’s over $1,300,000 annually!! MetalDWSD Result (mg/kg) EPA Table 3 (mg/kg) Arsenic Cadmium Chromium Copper Lead Mercury Molybdenum Nickel Selenium Zinc MetalDWSD Result (mg/kg) EPA Table 3 (mg/kg) Arsenic Cadmium Chromium Copper Lead Mercury Molybdenum Nickel Selenium Zinc Nutrient Value Per Acre* Nitrogen (N) $99.43 Phosphorous (P)$60.05 Potassium (K)$9.22 Magnesium (Mg)$17.36 Copper (Cu)$1.23 Zinc (Zn)$5.05 Lime$54.00 Spreading/Tillage$7.50 $253.84/ Acre * Prices as of 1/3/08, Auburn Fertilizer

Hauling and Spreading Cake Biosolids  Delivery in sealed dump trailers via approved haul routes  Unloading in designated staging areas  Loading to standard cake spreader

Cost savings for YOU! FY08 Biosolids Fund (2.4% CPI)$829, Less: FY07 Carry Forward-$109, FY08 Biosolids Funds Needed$719, Per Ton rate without DWSD$ Per Ton rate with DWSD$6.20 COST SAVINGS PER DRY TON25.16%

Public Education  Increase biosolids awareness statewide  Proactive approach  Increased involvement with local groups  Farm Bureau  NRCS