Renewable Energy

We have a holistic approach to producing renewable energy that addresses not only the carbon cycle, but the nitrogen, and nutrient cycles. We produce renewable energy from liquid or solid waste, from dilute swine and flushed dairy manure to concentrated wastes such as poultry manure, yard waste, and the food fraction of municipal solid waste. We have developed a variety of anaerobic digestion technologies that maximize the conversion of solids to biogas and from biogas to biomethane (methane). We have pioneered the development of zero emission anaerobic digestion facilities that produce no adverse environmental impacts.

Our technologies go beyond basic gas or power production. They manage nutrients while producing products of value. We sequester and reclaim nutrients such as phosphorus and ammonia nitrogen while increasing the nutrient density of the stabilized digested product. We can economically produce pipeline quality gas, pasteurized Class A fertilizer with any desired C:N ratio, and reusable water with a reduced salt content. Consequently the income streams are significantly improved.

Greenhouse Gas Mitigation

Our processes maximize the reduction of greenhouse gas emissions through the production of renewable energy. The reductions include avoidance of greenhouse gas emissions from other waste management technologies such as landfills, composting, or anaerobic lagoons. The reductions also include use of zero emission technologies that allow the siting of facilities close to the source of waste generation and product use to minimize transport emissions. Our technologies address the nitrogen cycle in addition to the carbon cycle. We maximize the reduction of nitrous oxide emissions.

We develop project design documents (PDD) for CDM projects, utilizing IPCC methodologies, throughout the world. We verify greenhouse gas emission reductions and establish offset values. We address greenhouse gas emissions relative to waste management, combined heat and power, and energy generation.

The Company

E3 is a private engineering and construction management corporation with operations in the US, Canada, and Mexico. It employees professional engineers licensed to practice from New York to California. It specializes in partnerships with waste producers and renewable energy users in applying it’s technology for the production of renewable energy, greenhouse gas mitigation, nutrient sequestration, and zero emission facilities.

History

E3 has been a renewable energy research and development firm since 1989. It has conducted research and process development for the US Department of Energy, US EPA, US Department of Agriculture, Idaho Association of Commerce and Industry, California Department of Energy, and King County, Seattle, Washington. In 2000 it built its first full scale facility for Southwest Suburban Sewer District, Seattle, WA. In 2002 it initiated the construction of a large dairy waste anaerobic digester in Fair Oaks Indiana. In 2004 it completed the design of two facilities in Mexico treating dairy and poultry manure. We applied for and received GHG (Green House Gas) credits under the Kyoto Protocol which aided in the financing of the Mexican renewable energy facilities. In 2006 E3 completed the design of a 40 ton per day solid waste (organic fraction) anaerobic digestion facility in Mason County, Washington.

Facilities

E3 has offices in Olympia WA and Sunnyvale, California. E3 maintains a fully equipped laboratory in Olympia WA, and mobile pilot facilities that operate throughout North America.

Completely mixed digesters normally process slurries having a solids content of 4 to 8% whereas plug flow anaerobic reactors are used to digest slurries having a solids content of 8 to 14%. The methane content of the gas produced is dictated by the chemical composition of the waste. Conventional digestion requires large tanks since the Solids Retention Time (SRT) is equal to the Hydraulic Retention Time (HRT). It is the solids retention time (SRT) that determines the percent of the influent solids that are converted to gas and thus the gas yield.