The end of fossil fuels begins here
Biogas upgrading systems cleanse the impurities in biogas and separate the carbon dioxide from the biomethane to create a clean, high-purity low-carbon fuel: biomethane / renewable natural gas (RNG).
Greenlane is the only biogas upgrading company to offer multiple core technologies: water wash, pressure swing adsorption (PSA), membrane separation, plus proprietary desulfurization solutions.
Greenlane manages the entire project life cycle from design and procurement through to on-site installation, commissioning, and aftercare. Post-installation, Greenlane provides aftercare service including 24/7 technical support and remote monitoring, as well as maintenance and spare parts.
For water resource recovery and food waste
- Best for Removing Impurities from Biogas from Highly Variable Feedstocks
Greenlane leads the field in water-wash (or water-scrubbing) technology, the most deployed biogas upgrading technology in the world. Water-wash systems use counter-flow water to scrub away impurities, without the need for chemicals or heat.
The Greenlane water wash process is simple. The raw untreated biogas flows through bulk hydrogen sulfide removal then is compressed, and flows upwards through a cascade of water. The carbon dioxide, remaining hydrogen sulfide, volatile organic compounds, and siloxanes dissolve into the water while the methane does not. The methane is then dehydrated providing pure, dry RNG. The water is cleaned of the impurities by counter flowing air through it and reused in a closed loop.
The Greenlane™ product line for high efficiency water-wash systems comprises five models designed to meet a wide range of flow-rate requirements. All the models are of a standard modular design with a compact footprint, able to process different raw biogas flow. Where larger capacity is required, we provide multiple systems in parallel.
Cascade PSA LF
- Best for landfill gas with N2 and 02
Pressure Swing Adsorption (PSA) is an effective method of separating specific gases from a complex mixture of gases, like those generated in landfills. The Greenlane PSA process involves several steps to purify the biogas and separate the methane from the carbon dioxide.
Hydrogen sulfide is removed first, and then the biogas is compressed, chilled and dehydrated before removing VOCs and siloxanes. An adsorbent media then traps the carbon dioxide, nitrogen, oxygen, and any remaining moisture, allowing the methane to pass through as clean and dry RNG. The media is regenerated and reused by releasing the pressure and putting it under a vacuum which causes the media to release the trapped contaminants.
The Greenlane™ product line for high efficiency pressure swing adsorption systems comprises three models designed to meet a wide range of flow-rate requirements. All the models are of a standard modular design with a compact footprint, able to process different raw biogas flow.
For the agriculture sector
- Best for biogas with H2S only
Membrane separation technology uses multi stage high efficiency tubular porous membranes to separate the carbon dioxide from the methane in a process called permeation. As the biogas passes through the tubes, the smaller carbon dioxide molecules pass through the walls of the highly selective permeable membranes while the larger biomethane molecules do not.
Membrane separation is often best suited for small to medium sized biogas upgrading projects where initial capital expenditure is considered more important than long-term life cycle costs.
However with a modular design and container enclosed packages, no gas flow is too low or too high for the Greenlane membrane biogas upgrading plants. With a multi stage process, and the ability to remove both CO2 & O2 together, these systems offer reliable performance and high biomethane recovery, which is typically over 99%.
Best for higher H2S concentrations
Every biogas project requires hydrogen sulfide removal. Greenlane Cascade H2S product line delivers an established, robust and cost effective regenerative biogas desulfurization solution for biogas-to-power or biogas upgrading projects where the goal is low operating expense.
The raw untreated biogas feeds into the bottom of a scrubbing tower where it flows, countercurrent, to a proprietary chemical solution. Treated gas exits through the top of the scrubber. The sulfur-rich solution is regenerated in a separate oxidation tank then the regenerated solution is transferred to a sedimentation tank to separate the elemental sulfur solids. Clean, regenerated solution returns to the scrubbing tower in a continuous and efficient process.
The Greenlane™ product line for biogas desulfurization is easy to install, operate, creates elemental sulfur solids that can be spread on fields as fertilizer, and eliminates many of the operational issues and costs that come with traditional biological scrubbing and media-based hydrogen sulfide removal systems.
Your trusted biogas upgrading partner