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Septage Bioreactor Landfill St. Clair County CTI & Associates, Inc. A St. Clair County RDDP Proposal.

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Presentation on theme: "Septage Bioreactor Landfill St. Clair County CTI & Associates, Inc. A St. Clair County RDDP Proposal."— Presentation transcript:

1 Septage Bioreactor Landfill St. Clair County CTI & Associates, Inc. A St. Clair County RDDP Proposal

2 Septage Disposal Need  Together, Macomb / St. Clair counties have approximately 50,000 septic tanks that generate 9.5 M gallons of septage annually  By 2030, the septage generation is expected to exceed 14 M gallons per year  Septage is currently disposed of at wastewater treatment plants or at licensed sites (i.e., “land application”)  St. Clair Co. has no WWTP that accepts septage





7 The Advisory Group concurred with the proposal and identified Smiths Creek Landfill as one of the four potential disposal sites

8 Project Background  Meanwhile, Smiths Creek Landfill was exploring various options of extending service life beyond the estimated 20 years  One promising and environmentally-sound option is the “bioreactor landfill”  The project team decided to use the bioreactor project to solve the septage disposal problem

9 Traditional Landfills vs. Bioreactor Landfills

10 Traditional Landfills  Often times referenced as “dry tombs”  Waste remains “dry” therefore suppresses decomposition


12 Fall 1990 Fall 1998 8 years in a “dry” landfill

13 Landfill Gas Production Gas Production Traditional Landfills (“Dry Tombs”) Containment Failure (Passing the liability to the next generation) ?

14 Bioreactor Landfills  Inject the collected leachate back into waste mass to increase moisture content  Add other liquids (e.g., septage) to further enhance decomposition  Drastically accelerate landfill gas production (renewable energy)  Aim achieving waste “bio-stabilization” in years (vs. decades or centuries in “dry tombs”)

15 Renewable Energy Landfill Gas Production Traditional Landfills (“Dry Tombs”) Containment Failure? Bioreactor Landfill Gas Production

16 Septage Bioreactor Landfill

17 Solid waste needs moisture pH-control nutrients microorganisms to decompose…

18 Septage provides all those needs, but needs a home…

19 Rapid refuse decomposition, Landfill space recovery, Renewable energy source Alt. septage treatment method etc., etc.

20 Smiths Creek Landfill RDDP Proposal

21  Septage treatment capacity (100,000 homes)  Recover energy to heat 800 homes for 10 years  Costs of expanding wastewater treatment capacity for septage is avoided  Potential energy recovery (> $3,000,000)  Potential space recovery (> $2,000,000) Smiths Creek Landfill RDDP Proposal

22 Septage Receiving N Septage Receiving Unit Lift Station Septage Truck

23 Septage Routing Distribution System Discharge Lines Storage Tanks Septage liquid Receiving Facility

24 Project Status  Septage bioreactor cells are constructed and have been certified and licensed by MDEQ  Landfill operators began to add Municipal Solid Waste to bioreactor cells in Nov. 2006  RDDP permit application was approved by MDEQ on February 23, 2007  Septage introduction to begin in approximately 6 months after completion of receiving facility, storage tanks and distribution system

25 Conclusion  Disposal of septage in landfills is an environmentally sound practice  Septage addition will accelerate waste decomposition therefore extend landfill service life  Septage bioreactor is also a viable source of renewable energy  Brings us one step closer to the vision of “perpetual” landfill  Septage bioreactor is consistent with goals and objectives of Solid Waste Management Plan

26 Background on Part 115 Import/Export Authorizations  In order for a disposal area to serve the needs of another county, state, or country, the service, including the disposal of municipal solid waste incinerator ash, must be explicitly authorized in the approved solid waste management plan of the receiving county. With regard to intercounty service within Michigan, the service must also be explicitly authorized in the exporting county’s solid waste management plan. Chapter 3 of the Natural Resources and Environmental Protection Act, P.A. 451 of 1994, section 11538(6) states:

27 Reason for proposed amendment to Solid Waste Plan  St. Clair County has a long-standing policy of self-sufficiency with regards to the disposal of solid waste –No waste allowed into or out of county –Manage our resource for the long-term benefits of County citizens  Septage Bioreactor will help us manage our resource in a responsible manner by expanding the service life of the landfill

28 Thank You! For additional information, please contact Dr. Te-Yang Soong CTI & Associates (248)486-5100

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