About A.R.C. Technologies Corp.
ARC Technologies' (ARC) proven two stage methane extraction system takes raw
Landfill/Digester Gas (biogas) and converts it to pipeline quality natural
gas and or CNG by removing all impurities in the raw feedstock.
Figure 1 above shows the second stage of ARC Technologies' proprietary
methane extraction system. The pressure swing absorption (PSA) unit is
designed to remove carbon dioxide (CO2), nitrogen (N2)
and oxygen (O2) from pretreated biogas gas streams. The resulting
high-grade methane (CH4) product stream can be used as pipeline
natural gas or CNG fuel. The PSA unit will automatically adjust its
configuration when a sudden increase in N2 & O2 is
seen in its feedstock, due to an upset (broken hose, etc.) in the gas
collection system. This automatic function allows the system to continually
produce pipeline quality gas. The system is designed to recover the maximum
methane possible based on its feedstock gas quality.
The first stage of ARC Technologies' methane extraction system is its
proprietary pretreatment process which removes the contaminants that are in
the biogas's feedstock. These contaminants can cause serious problems in any
plant's feedstock in regards to engine, turbine and gas processing
What is pretreated biogas?
Pretreated biogas is a gas stream in which the contaminants have been removed
and can be delivered to the gas separation section of the gas plant or to a
turbine/engine generator set to produce electrical power. The following
contaminants need to be addressed in biogas, which will in turn greatly
extend the life expectancy of the overall plant media, compressors and/or
turbine/engine generator sets. ARC Technologies' pretreatment process
will remove the following contaminants:
- Hydrogen sulfide (H2S)
- Water vapor (H2O)
- Non-methane organic compounds (NMOC)
- Silicon (siloxanes)
Figure 2 shows a schematic diagram of the major components of ARC
Technologies' biogas treatment process.
In Figure 2, the landfill generates methane in an anaerobic bacterial
environment. ARC Technologies' landfill vacuum blower shown as the "Landfill
Vacuum Source" pulls landfill gas (LFG) into the gas processing system. The
control system allows the proper vacuum set point to be maintained to
maximize the methane production. The gas enters through the first of
two gas scrubbers, designed to reduce H2S and siloxanes. The fluid
in this scrubber is regenerated and reused by the system. A second scrubber
is shown on the discharge side of a vacuum blower, which removes Non-methane
organic compounds (NMOC's).
The main compression system has the capability to take the gas pressure
from 0 psig to as high as 120 psig. ARC Technologies' gas separation process,
shown above, normally operates in the range of 100 psig for proper gas
separation. The main advantage of the low compression design is safety and energy
After the compression stage, water is removed and a final gas-polishing
step is used to catch any remaining contaminants.
The pretreated biogas now enters one or more vertical PSA columns. Each
PSA column has three sections for processing gas.
The system adjusts the control algorithm to achieve the maximum recovery rate
for the product gas. ARC Technologies' design allows for a 3 to 1 turn down
ratio in regards to plant inlet feedstock flow. The plant's design allows for
additional capacity with the addition of vertical columns.
The PSA column has a second product port, which, when used, will deliver
product feed gas for turbine, engine and CNG use with very little pressure
drop (loss). For the past two years ARC has been successfully operating
a system on a Waste Management landfill and injecting high quality gas into
- Proven technology at a competitive price
- One source for the total plant design, operation and
- Process is modular, scalable, and skid mounted
- ARC's process is remotely monitored to ensure optimum operation
- Low gas separation pressure requirements
- Pipeline quality gas and CNG quality product ports
- High efficiency
- Low turn down
- Low operating costs
When you buy a system from ARC Technologies, you will be dealing with
only one manufacturer who will take care of all the complex issues of a
project this size. No matter if you are a landfill owner or a developer, ARC
Technologies is capable of completing all phases of the project such as:
- Providing up front feasibility study of your landfill's potential
- Complete interface with gas company metering
- Supply ARC Technologies Low BTU Thermal oxidizer
- Existing Flare/combustor interface
- Provide interfacing with existing gas collection
- Evaluate site requirements and provide construction services
- Delivery in 30 weeks or less
- Fixed O&M
Technologies High BTU PSA Unit located on Waste Management's South Hills
Installation of a six-column Gas Separation unit
-- ready to run
ARC is the leader in process technology for pretreatment and total
treatment of waste gas. We offer competitive pricing, high process
efficiency, low operating costs and reliability that are second to
none. Whether you are cleaning the gas to enhance your turbines
reliability, producing vehicle fuel or looking to enter the pipeline, there
is only one company who can meet your needs. The ARC process stands
alone in its ability to clean waste gases cost effectively and efficiently
utilizing proven technology at a competitive price.
Please feel free to contact us today to visit our operating plant or to
discuss your project.
Phone: (724) 722-7066
FAX: (724) 722-7068
ARC Technologies Corp.
P.O. Box 485
Yukon, PA 15698-0485