What is biogas?

Biogas is mixture of gases consisting predominantly of methane, which is the key component of natural gas. Biogas is generated when organic matter is broken down by some forms of microorganisms (bacteria) in an oxygen-free environment. This decomposition process is referred to as Anaerobic Digestion (AD).

What are Biogas Systems?

A system designed for the AD process to take place is a biogas system where the organic matter is decomposed and the results in generating biogas and a digested organic matter called the digestatein the liquid or a semi- liquid form

Anaerobic Digestion (AD) Technology

AD technology facilitates the organic material to decompose inside a man-made vessel called a reactor (biogas digester) under controlled conditions

The mixture of gases in biogas primarily consists of methane (50%-70% by volume) and carbon dioxide (30%-40%). Commonly used raw materials in biogas systems include livestock manure, municipal garbage, agricultural residues, plant material, sewage, industrial organic wastes, industrial waste water  and food wastes etc. The biogas generation process consists of four biochemical reactions, and performance of different groups of microorganisms are responsible for the decomposition of organic matter into biogas and digestate.

Benefits of Biogas Systems

Sustainable biogas systems are multifunctional bringing multiples of benefits.

Waste Management and Environment

  • Biogas systems decompose orgasmic wastes into useful products. Therefore, they serve as a waste treatment process while protecting the environment;

Agriculture and Food Security

  • Biogas systems convert low-value organic material to digestate, a higher-value material. Digestate can be used as a bio-fertilizer, pest repellent, soil conditioner, and even as a feed for some other species (ex. fish). Therefore, biogas systems can contribute with agricultural inputs and enhance food security. Application of bio inputs in place of chemical fertilizer, pesticides, veedicides etc can prevent soil, water and air contamination and pollution, while safeguarding health too

Energy

  • Methane in Biogas can be used to generate heat and electricity. Biogas can be purified and upgraded into a natural gas. Biogas also can be used as a substitute for Liquid Petroleum Gas (LPG). Therefore, biogas is a source of renewable energy.
  • Further, electricity generated from biogas systems are dispatchable, unlike the other intermittent sources of renewable energy such as wind and solar energy.
  • Biogas is a renewable source of energy which can directly replace fossil fuels  and decrease their carbon footprint
  • Biogas supports distributed generation of energy, which means lower transmission and transportation costs as well as reduced impact and higher reliability of electrical grids
  • Systems with gas storage can provide renewable electricity on demand in minutes, reducing the need to turn on fossil fueled power plants to meet peak demand
  • Therefore, there are numerous ways how biogas systems can benefit you, your business, your institution, and your community, and the country and the globe as a whole.
  • substitute and boosts public image.

Biogas systems protect our air, water, and soil by recycling organic waste into renewable energy and soil products, while reducing GHG emissions.

In the U.S., there is an urgent need to manage the millions of tons of food, water and animal waste. The main benefits of biogas systems come from the fact that they are recycling all this material while also producing renewable energy and soil products which displace fossil fuels.

When you put these and other benefits together, we can prevent tons of carbon emissions from entering our air, prevent nutrients from entering our waterways, create healthier soils with natural, non-fossil fuel-based fertilizers, and produce reliable, baseload renewable energy.

Waste Management and Environmental Benefits

  • Recycle manure and kill odors and pathogens while producing renewable energy and soil products
  • Help assist the natural cycles of recycling to farming
  • Moving manure from open lagoons to an airtight biogas system reduces GHG emissions
  • Reduce carbon emissions in transportation by at least half compared to fossil fuels
  • Recycling manure creates an opportunity to separate nutrients and keep them out of waterways
  • The use of digestate can replace costly synthetic fertilizers and can increase plant growth by 10-30 percent compared to synthetic fertilizers
  • Plants absorb soil nutrients, like nitrogen or phosphorus, more easily than raw manure. This allows farmers to use the right volume and ratio of nutrients needed and minimize the additional purchase of synthetic fertilizers.

Economic and Social Benefits

  • A cost-effective solution to turning a high-cost deliverable like waste treatment into a revenue-generating opportunity for farmers and rural communities
  • For companies that want to reduce their carbon footprint, some biogas systems are so carbon negative that replacing a small percentage of fossil gas with renewable biogas or renewable natural gas can help reach net-zero goals
  • Create new revenue streams in rural America, building resiliency against commodity price fluctuations.
  • Can reduce farm costs for animal bedding and fertilizer and generate new revenue streams.
  • A driver for economic growth and offer local jobs in construction, engineering, project management and more
  • Reduce the volume of waste, meaning that costs are often lowered for facilities like wastewater plants