Biomethane vehicle fuel (often referred to as biogas or renewable natural gas) converts everyday organic waste into cleaner miles for trucks, buses, and light commercial vehicles. It’s proven technology, simple to operate with the right kit, and it can dramatically cut well‑to‑wheel emissions versus fossil diesel.

At a glance: why fleets switch

• Lower lifecycle CO₂e than diesel, supporting Scope 1 reductions and decarbonisation targets.
  
• Proven engines & infrastructure from major OEMs and experienced station partners.
  
• Operational practicality: quick refuelling, clear safety procedures, and reliable data capture for sustainability reporting.
  
• Circular by design: turns unavoidable waste streams into practical work on the road.
  

How biogas is made

Biogas begins its life in an anaerobic digester (AD), where microbes break down organic materials such as food waste, agricultural residues, manure, and wastewater sludge in the absence of oxygen. The raw biogas produced contains methane (typically ~50–65%), carbon dioxide and trace impurities. The AD process usually involves:

1. Feedstock preparation – sorting and pre‑treatment to remove contamination (plastics, grit).
   
2. Digestion – controlled temperature, mixing and retention time to maximise gas yield.
   
3. Biogas capture – collecting and storing gas from the digester headspace.
   
4. Digestate handling – returning the nutrient‑rich by‑product to land as a fertiliser replacement.
   

Why this matters for fleets: AD converts unavoidable waste into a transport fuel that directly displaces diesel while reducing greenhouse gases and local pollutants.

From raw biogas to vehicle‑grade biomethane

Raw biogas requires upgrading before it can be used in engines. The goal is to raise methane concentration to ~96–99% and remove impurities that could harm components. Common upgrading routes include:

• Water scrubbing (CO₂ dissolves under pressure)
  
• Pressure swing adsorption (PSA)
  
• Membrane separation (semi‑permeable fibres separate CH₄ from CO₂)
  
• Chemical/amine scrubbing (selectively absorbs CO₂)
  

Polishing out the impurities

In addition to CO₂ removal, treatment typically includes:

• H₂S removal (corrosive)
  
• Drying to eliminate moisture and prevent corrosion/ice formation
  
• Siloxane/VOC filtration to protect catalysts and after‑treatment systems
  

The result behaves just like fossil natural gas at the nozzle—only it’s renewable.

Compression and dispensing: Bio‑CNG for road vehicles

Once upgraded, biomethane is compressed into Bio-CNG (compressed biomethane), which is functionally equivalent to fossil CNG at the nozzle but derived from renewable sources. It’s stored in high‑pressure storage banks at refuelling stations and dispensed to vehicles with onboard gas tanks. Depending on the project, stations may also dispense LNG/LCNG. For drivers, the experience is straightforward: connect, authenticate, fill to pressure, disconnect.

Feedstocks that power the miles

Biogas thrives on a mix of sustainable, non‑food feedstocks for performance and year‑round supply:

• Agricultural residues: manures, crop residues, slurries
  
• Food & drink waste: retail, hospitality and household organics
  
• Industrial organics: breweries, dairies, food processors
  
• Sewage sludge from wastewater treatment
  

Blending feedstocks stabilises digestion, improves yields, and maintains consistent fuel quality for engines.

How Roadgas makes adoption easy

We pair robust infrastructure with driver-friendly technology, enabling fleets to scale biomethane with confidence.

Bespoke on‑site stations

We design, build, install and maintain dedicated biomethane/CNG, LCNG and LNG refuelling stations on your site. Where a grid connection is possible, we source CNG from the National Grid; where it isn’t, we provide on‑site storage banks and dispense equipment. All stations are tailored to your duty cycles and fleet size.

24/7 remote monitoring & maintenance

All stations include real-time remote monitoring of fuel dispensing and system status, plus in-house servicing and statutory examinations to maximise uptime and safety. You’ll receive the reporting you need for operations and sustainability audits without extra admin.

Gas supply management

• We work with an independent gas distributor to monitor, order and deliver renewable biomethane to your station — in time, on time, every time.
  
• 24/7 fuel monitoring ensures you get the exact quantities you need to keep wheels turning.
  
• Fuel options include biomethane, as well as CNG, LNG, and LCNG, where appropriate.
  

Driver experience and safety first

From first‑time onboarding to daily fills, we focus on frictionless refuelling, simple authentication, clear safety guidance and rapid issue reporting. So trucks spend more time rolling and less time waiting.

Getting started: a pragmatic roadmap

1. Route audit – Identify duty cycles and lanes best‑suited to biomethane/Bio‑CNG.
   
2. Station selection – Choose public access, on‑site private, or a hybrid approach.
   
3. Pilot phase – Introduce a small cohort of gas vehicles to validate operations.
   
4. Scale‑up – Add vehicles and stations as confidence and coverage grow.
   
5. Measure & prove – Use captured data to demonstrate real‑world CO₂e reductions and TCO benefits.
   

Proof in action: Roadgas projects

• Nottingham City Transport — Grid‑connected bioCNG station supporting what NCT describe as the world’s largest biogas double‑decker fleet. Designed for six‑minute fills and up to ~50 buses per hour at peak, with built‑in redundancy, 24/7 monitoring and zero downtime reported.
  
• Moy Park, Sleaford — Twin on‑site bioLNG stations (100% bioLNG). Delivered in 2021 with Roadgas providing gas delivery management, 24/7 service & maintenance, and driver training. Expected to offset ~5,600 tonnes of CO₂ annually; case study cites up to 35% fuel cost reduction and up to 84% CO₂ and ~98% particulates reductions.
  
• Imperial Logistics, Oxford — bioLNG station for 21 IVECO LNG Stralis trucks serving BMW’s Mini Plant in Cowley. Roadgas delivered an operational solution in eight weeks (temporary install followed by permanent infrastructure), with weekly gas deliveries, 24/7 telemetrics and reported 0% downtime.
  
• Clipper Logistics, Wakefield — On‑site bioLNG station supporting the first six IVECO LNG Stralis trucks (July 2022). Roadgas manages green gas deliveries and provides 24/7 service & maintenance.
  

Final thoughts

Biogas as vehicle fuel turns waste into work—delivering a cleaner burn, dependable uptime and credible carbon savings. If you’re exploring biomethane across your operations, Roadgas pairs bespoke station infrastructure, in‑house equipment and 24/7 monitored gas supply to make adoption straightforward for drivers and transparent for fleet managers.

Ready to map your first routes on biomethane?

Talk to Roadgas about a tailored on‑site biomethane station and gas supply plan for your fleet.