RNG opens up a promising future market for the biogas industry. With feed-in into the public natural gas grid, the green all-rounder is perfect for the decentralised supply of energy, offering a long-term replacement for fossil natural gas and driving the energy transition forward. What’s more, the RNG manufactured in the gas upgrading plant has the exact same properties as natural gas, being just as flexible in its usage and easier to store than other energy sources. Plus, it’s renewable.
Anaerobic digestion of organic materials creates a gas composed of methane and carbon dioxide. To upgrade the biogas to natural gas-quality RNG, the crude gas is first purified and compressed. The membrane technology we use then exploits the different sizes and permeation speeds of the two kinds of gas molecules involved: since carbon dioxide molecules are smaller than methane molecules, they can migrate through the membrane much more quickly. As a result, the methane remains on the high-pressure side, while the CO2 molecules in the biogas pass through. As a result, the gas upgrading needs neither chemicals nor water nor any other resources.
The starting point for producing RNG doesn’t have to be biogas, however. After a preliminary purification stage, gas from landfill and wastewater treatment plants can also be used to produce Renewable Natural Gas.
The RNG so produced is the all-rounder among renewable energy sources, and can replace fossil fuel-based natural gas anywhere it is used. On the following pages, you can find out about the many uses for this valuable and renewable natural gas, and how it can play a part in an environmentally-friendly energy supply system.
Looking for a dependable partner in the RNG industry? From the initial raw gas purification stage to efficient gas upgrading (including after-sales service) and the subsequent marketing of the gas produced, we can offer you tailor-made solutions from start to finish along the value chain. Find out more here about our high-efficiency EnviThan technology and our internal case studies.