AERG has designed and installed several fully automated, demand-based, biogas-natural gas fuel blending system to supply fuel to boilers. With this cost effective fuel blending system the biogas and natural gas are blended together at a defined ratio before being utilized in the boiler. Instead of converting the boiler to utilize biogas with a new fuel train, the existing fuel train will be retrofitted with redundant safety valves, flow control valves, and intake air controls. In addition, an oxygen sensor is installed in the exhaust stack of the boiler and an auto-trip option to control the air fuel ratio enable the boiler to operate more efficiently.
Our blending control system can handle a wide range of biogas / natural gas mixture ratios supplied to the boiler. This simple and cost effective system eliminates the need for an alternate biogas fuel train for the boiler. A custom-built programmable logistic controller (PLC) operates the entire system and provides fuel modulation based on biogas availability and steam demand. In addition, the boiler will automatically switch over to natural gas if there is not sufficient biogas available or due to a biogas system shutdown. The system operating variables and performance data are stored in the PLC for future reference.
Production of pipeline quality natural gas from biogas is achieved by utilizing a patented and propriety technology developed from proven Pressure Swing Adsorption (PSA) technology. This technology has been modified specifically to treat biogas. The system removes the contaminants to produce pipeline quality gas in an easily operated, fully automated system with very low maintenance. These systems are noted for high reliability, unattended operation, and environmental friendliness. This system can be installed where the influent biogas flow is as little as 100 scfm to as high as 2,000 scfm. Biogas is purified to the following pipeline quality specifications:
AERG has extensive experience in the design and installation of anaerobic lagoons to treat high strength wastewater from meat processing facilities. Those include cattle, poultry, hog, and rendering facilities. We also have experience with anaerobic digestion to produce biogas from and fruit/vegetable facilities, and breweries. Proper lagoon construction is essential to ensure protection of ground water resources as well as to provide a system that will operate effectively for several years. AERG’s construction activities include:
AERG has installed several HDPE lined anaerobic lagoons and floating cover systems for capturing biogas from anaerobic lagoons. The floating cover system placed on the top of the lagoon captures the biogas produced by the lagoon. The edges of the floating cover system are anchored along the top of the berm to provide a gas tight seal. Main components of our floating cover system are:
As experts in the environmental engineering field we can provide you with a perfect solution to your waste water, lagoon, or biogas problem. Our staff has diverse experience with many projects in the United States. We provide engineering, construction management, permitting, and training support.
Check out some of our projects and see if your facility could benefit from our experience. We handle any project, large or small, with care and attention to detail to provide our clients with the best possible product.
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Biogas collected beneath the floating cover system can be used as a fuel source or flared-off as it is produced. AERG provides the following services for biogas recovery and utilization: