Professionals
Professionals
Professionals
Professionals
Project Commissioning

 

 
 

 

 

 

 

Anaerobic Digestion Studies


Conducted preliminary evaluation of an anaerobic digestion facility including combined heat and power system. Detailed calculations were developed for the processing of sludge through conventional dual stage anaerobic digestion and combined heat and power providing preliminary sizing and available heat and energy production through combined heat and power. The evaluation also included sizing and development of proprietary technologies for high solids anaerobic digestion with Infilco Degremont’s HiSAD process and alkaline stabilization with technologies from RDP and N-Viro. A benefit analysis was completed that evaluated the capital and operations and maintenance costs, the savings associated with on-site electrical generation, and the potential clean energy funding incentives.

 

Completed an anaerobic digestion study for the Surfside Wastewater Treatment Facility, located in Nantucket, MA. The facility receives fats, oil, and grease (FOG), and brewery waste in addition to the domestic wastewater that it treats. The evaluation focused on a review of suitable technologies for the treatment of FOG as well as the development of small scale anaerobic digestion for the treatment of FOG, brewery waste, and domestic sludge. We evaluated FOG treatment technologies designed by Superior Process Technologies and FOG2D™. Due to the space constraints at the facility, the study also focused on the feasibility of the development of small scale anaerobic digestion. The High Solids Plug Flow Digester by BIOFerm™ was evaluated based on the solids loading at the plant. Due to the high energy content of the digester gas, an assessment of the potential waste heat recovery and power generation was also completed. A benefit analysis was completed that evaluated the capital and operations and maintenance costs, the savings associated with on-site electrical generation, and the potential clean energy funding incentives. In addition, a review of the State’s commercial food ban was completed and the potential future impacts to the facility were assessed.

 

Developed an anaerobic digester assessment of the Town’s 15.6 million gallon a day wastewater treatment facility that focused on the rehabilitation of the facility’s two digesters. Options for fixed, floating and gasholding covers were assessed. In addition, a number of mixing options were evaluated that included the installation of a number of gas and mechanical mixing system options. The review of the mixing systems included an assessment of the projected operational energy consumption of each of the systems.

 

The 3.5 million gallon a day City of Derby wastewater considered rehabilitation of its existing anaerobic digesters for the treatment of domestic sludge. The analysis focused on the feasibility of installing a combined heat and power system using anaerobic digester gas. The study assessed the quantity and quality of the biogas that would be produced to determine suitable cogeneration technologies. The assessment focused on the implementation of an internal combustion engine and microturbines. Due to the constituents found in biogas (moisture, H2S, and siloxanes) that can adversely impact the operation of energy recovery systems, the study also included an assessment of biogas conditioning systems. The study included an economic assessment of the project and presented options for State funding.

 

Development of anaerobic digester and combined heat and power system projects at wastewater treatment facilities in New England and New York.