- Sanitary Landfill Services
Burns & McDonnell has provided professional engineering services to the City of Columbia Sanitary Landfill for more than 20 years. This included the design and permitting of the original sanitary landfill areas and currently includes engineering services. Burns & McDonnell assisted in development of a heat recovery project, completion of a Missouri Department of Natural Resources (MDNR) funding application, design of bioreactor landfill operation and development of a solid waste management plan.
Burns & McDonnell was the owner's engineer for the procurement, design and construction of a landfill gas power plant for the City of Columbia. Work included the concept design for the power plant and a new gas delivery system. The Landfill Gas Power Plant building has a nominal future peak capacity of 4 megawatts (MW), and the current capacity is 2 MW (nominal). Electric power is provided by two Jenbacher J320 reciprocating gas engines.
The heat recovery project uses engine waste heat to provide heating for the materials recovery facility (MRF) and an administration building shop area.
Burns & McDonnell completed the MDNR funding application under the Energy Efficiency and Conservation Block Grant (EECBG) program for the City of Columbia. This application resulted in the city receiving a MDNR award of $1 million to fund energy efficiency projects for the community.
The City of Columbia uses methane from biogenic sources to generate electricity at its municipal solid waste (MSW) landfill and the Columbia Regional Wastewater Treatment Plant (WTTP). The proposed project provided improvements to both the MSW landfill and WTTP power plants to better utilize the biogenic methane and offset consumption of nonrenewable resources.
These combined heat and power (CHP) projects resulted in a reduction of annual electricity use by approximately 3.6 kWh, annual natural gas savings of approximately 12,300 Therms, and a greenhouse gas emissions reduction of approximately 3,120 MT CO2e.
- MSW Landfill: The MSW landfill currently uses landfill gas (LFG) to generate electricity. This project leveraged existing LFG power plant infrastructure and provided a CHP application for long-term use.
- WWTP: The Columbia WWTP generates methane gas through the anaerobic digestion of wastewater treatment process sludges. Currently a single 240-kW power plant is used part of the year to generate electricity. Due to the limited capacity of the plant, only a portion of the available methane gas is consumed. The proposed improvements were to replace the existing plant with a CHP plant consisting of two 400-kW turbocharged, after-cooled, engine-generators and construct a methane gas cleaning system to reduce CHP engine maintenance requirements.
Bioreactor & Solid Waste Management
Burns & McDonnell prepared construction documents for a 10-acre cell, Cell 5, which is operated as a bioreactor. This included geotechnical services and testing for soil liner material quality and quantity verification. Once the construction documents were completed, Burns & McDonnell assisted with project bidding.
When bioreactor construction began in spring 2011, Burns & McDonnell provided a resident project representative and administration during critical construction stages. Once Cell 5 was complete, Burns & McDonnell provided operations assistance including daily, weekly, monthly and annual operation data assembled for comparison with the existing Bioreactor Operating Manual.
Burns & McDonnell conducted a hydrogeologic investigation at the site in 1993 and completed the Phase A groundwater assessment investigation in response to statistical exceedances of both organic and inorganic parameters reported subsequent to a semiannual groundwater sampling event.
The company also prepared a two-phase solid waste management plan for the city and reviewed its existing solid waste program. The management plan evaluated the current solid waste collection and disposal system and identified alternative system improvements that could be efficiently and cost-effectively implemented.
- Power plant concept design
- Design-build RFP
- Owner select design-builder assistance
- Owner's engineer
- MDNR application forms
- Conceptual design/cost estimate for combined heat power (CHP) systems
- Solid waste management plan
- Bioreactor design
- Compliance monitoring
- Landfill gas to energy feasibility and procurement