Presentation on theme: "Septage Bioreactor Landfill"— Presentation transcript:
1 Septage Bioreactor Landfill A St. Clair County RDDP ProposalSt. Clair County CTI & Associates, Inc.
2 Septage Disposal NeedTogether, Macomb / St. Clair counties have approximately 50,000 septic tanks that generate 9.5 M gallons of septage annuallyBy 2030, the septage generation is expected to exceed 14 M gallons per yearSeptage 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 BackgroundMeanwhile, Smiths Creek Landfill was exploring various options of extending service life beyond the estimated 20 yearsOne promising and environmentally-sound option is the “bioreactor landfill”The project team decided to use the bioreactor project to solve the septage disposal problem
13 Landfill Gas Production ContainmentFailure(Passing the liability to the next generation)?Gas ProductionTraditionalLandfills(“Dry Tombs”)
14 Bioreactor LandfillsInject the collected leachate back into waste mass to increase moisture contentAdd other liquids (e.g., septage) to further enhance decompositionDrastically accelerate landfill gas production (renewable energy)Aim achieving waste “bio-stabilization” in years (vs. decades or centuries in “dry tombs”)
15 Landfill Gas Production Bioreactor LandfillRenewable EnergyGas ProductionContainmentFailure?TraditionalLandfills(“Dry Tombs”)
21 Smiths Creek Landfill RDDP Proposal Septage treatment capacity (100,000 homes)Recover energy to heat 800 homes for 10 yearsCosts of expanding wastewater treatment capacity for septage is avoidedPotential energy recovery (> $3,000,000)Potential space recovery (> $2,000,000)
22 Septage Receiving Unit Lift StationSeptage Receiving UnitSeptage TruckN
24 Project StatusSeptage bioreactor cells are constructed and have been certified and licensed by MDEQLandfill operators began to add Municipal Solid Waste to bioreactor cells in Nov. 2006RDDP permit application was approved by MDEQ on February 23, 2007Septage introduction to begin in approximately 6 months after completion of receiving facility, storage tanks and distribution system
25 ConclusionDisposal of septage in landfills is an environmentally sound practiceSeptage addition will accelerate waste decomposition therefore extend landfill service lifeSeptage bioreactor is also a viable source of renewable energyBrings us one step closer to the vision of “perpetual” landfillSeptage bioreactor is consistent with goals and objectives of Solid Waste Management Plan
26 Background on Part 115 Import/Export Authorizations Chapter 3 of the Natural Resources and Environmental Protection Act, P.A. 451 of 1994, section 11538(6) states: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.
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 wasteNo waste allowed into or out of countyManage our resource for the long-term benefits of County citizensSeptage Bioreactor will help us manage our resource in a responsible manner by expanding the service life of the landfill