- Biogas Conditioning System


The BioCNG™ system offers a simple and effective technology for producing CNG vehicle fuel.  Biogas is piped to the patent pending BioCNG™ System from a landfill or anaerobic digester. Then hydrogen sulfide, moisture, siloxanes, volatile organic compounds and carbon dioxide are removed. Product gas is piped to a vehicle fueling system for use as fuel in CNG vehicles.

BioCNG units are available in three sizes: BioCNG™ 50 BioCNG™ 100 BioCNG™ 200. The model number refers to the amount of gas (in scfm) that each size uses:

If inlet biogas quality meets certain standards, BioCNG guarantees that the biogas produced meets SAE J1616 vehicle fuel quality standards. Production costs range from $0.65 to $1.15 for a gallon of gasoline equivalent (GGE), with the potential for renewable fuel credits (RIN).

The system can be supplemented or run in parallel with natural gas and it can be integrated with existing cogeneration systems. Vehicle fueling systems, (compression, storage, and fuel dispensers) can be customer-supplied or included with the BioCNG™ system.


The BioCNG™ system uses a patent-pending biogas conditioning system to economically produce biogas-based fuel to power CNG vehicles. The patent application was filed on June 3, 2010 and is titled: INTEGRATED FUEL PRODUCTION AND ELECTRICITY GENERATION, EFS ID# 7737389, Application # 12793240.

BioCNG™ targets smaller-scale biogas-to-CNG alternative vehicle fuel projects. The economics of past small scale systems had often proved unfavorable, primarily because of the large capital and operating expense associated with cleaning and conditioning the biogas. BioCNG™, with its simple modular design, has been able to address these issues and produce a low cost renewable natural gas vehicle fuel.

BioCNG, LLC offers various sized units that produce up to 1,000 gallons of gasoline equivalent (GGE) per day. Multiple units can be installed for larger projects and higher production rates.

Although relatively new as a system, all BioCNG™ equipment components have long operating experience and are proven and reliable technologies. Operating BioCNG™ systems have performed well, with minimal maintenance issues or downtime.


In addition to offering low cost fuel, according to the United States Department of Energy (DOE) properly maintained natural gas powered vehicles can significantly reduce tailpipe emissions of nitrogen oxides (NOx), non-methane hydrocarbons (NMHC), carbon monoxide (CO), other air toxics, particulate matter, sulfur dioxide (SO2), and global warming gases. The table shows estimates of pollution reductions provided by the BioCNG System.


The BioCNG™ system offers a simple and effective technology for producing CNG vehicle fuel at a fraction of the cost of gasoline or diesel while getting similar or better engine performance. The environmental benefits that come along with this clean fuel production process are a great bonus, along with positive community relations that arise from the projects.

Consider these benefits of BioCNG™ vehicle fuel:

  • Approximately half the cost of gasoline and diesel – and less than other types of CNG fuel
  • Qualifies for federal Renewable Fuel Credits(RINs)
  • Meets or exceeds CNG fuel specifications SAE J1616 and complies with engine manufacturers warrantees
  • Vehicle performance is similar to that of gasoline, diesel and NG fuels
  • The “greenest” vehicle fuel, resulting in significant carbon footprint reduction

Lowering your fuel costs – half the cost of gasoline and diesel

At less than $2 per GGE, BioCNG™ is half the cost of gasoline and diesel and slightly less than pipeline NG fuel. The cost of BioCNG™ fuel is further reduced by state and federal financial incentives not available to the other fuels.

Replacing petroleum – a national priority

Making America less dependent on foreign oil is a national priority. The US Congress established aggressive goals of reducing dependence on foreign oil by increasing the availability and use of domestic resources, in particular natural gas. Investing in the research and development of natural gas as a vehicle fuel is part of this ambitious plan.

Did you know that, while the U.S. imports more than 47 percent of the oil it uses, 98 percent of the natural gas used in the U.S. was produced in North America? Every gallon equivalent of natural gas used in vehicles is one less gallon of petroleum that has to be imported.

Reducing emissions – far lower than gasoline and diesel

Exhaust emissions from natural gas vehicles (NGVs) are much lower than those from gasoline and diesel vehicles. For example, the natural gas-powered Honda Civic Natural Gas has been recognized by the U.S. Environmental Protection Agency (EPA) as the cleanest commercially available, internal-combustion vehicle. The California Air Resources Board rated the Civic Natural Gas to meet the stringent AT-PZEV standard.

Replacing a typical older vehicle with a new NGV vehicle reduces exhaust emissions:

  • Carbon monoxide (CO) reduced by 70-90 percent
  • Non-methane organic gas (NMOG) reduced by 50-75 percent
  • Nitrogen oxides (NOx) reduced by 75-95 percent
  • Carbon dioxide (CO2) reduced by 20-30 percent

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