About usAdvancing renewable energy
Our Goals and Processes
Sevana Bioenergy is developing multiple biogas projects in agricultural regions of North America. With an experienced team of national and international experts, we build value-add partnerships in agricultural communities by creating new markets for existing agricultural businesses, reducing waste, increasing the use of renewable energy and reducing long-term greenhouse gas emissions.
Our goal is to ensure that communities benefit and thrive through these partnerships while building renewable solutions to local waste and energy challenges.
A Strategic Commitment To A Sustainable World
Animal manure, crop residues, wastewater solids, food scraps, and by-products from food production are some of the most common materials that are added as “feedstock” into a biogas system. Some organic materials digest more readily than others. Anaerobic digestion facilities may be built for a single feedstock or for a combination of feedstocks to enhance gas production.
Anaerobic digestion is a process that that utilizes microorganisms within sealed tanks to break down organic waste into biogas and nutrient rich soil amendments. The system continuously produces biogas and coproducts as long as the microorganisms inside the digesters have a continuous supply of organic material.
Biogas is mostly methane, carbon dioxide, water vapor, and the other trace compounds. Biogas can be upgraded to biomethane (or renewable natural gas) which can replace natural gas in almost any application. Biogas upgrading involves the removal of non-methane compounds and the level of processing needed varies, depending on the final application.
Upgraded biogas, often called “biomethane” or “renewable natural gas” or “RNG”, can be used the same way you use fossil natural gas: to produce heat, electricity, or vehicle fuel, or to inject into natural gas pipelines. The decision to choose one use over another is largely driven by local markets. Injecting renewable natural gas into existing pipelines increased the percentage of renewable fuels in the energy infrastructure of the United States.
Solid and liquid “digestate” are byproducts of the anaerobic digestion process and contain a broad array of nutrients including nitrogen, phosphorus, potassium and organic carbon. Solid and liquid digestates are used as organic fertilizer, compost, soil amendments, or animal bedding. Digestate byproducts are commonly applied to crop land to return nutrients, organic matter and carbon back to the growers who supply the facility.