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Advantages of Biogas Energy Technology
Redundancy and disaster prevention
By installing two or more digesters at a facility, Biogas Energy ensures operational throughput even if one digester goes off-line.
But preventing problems is the first priority:
- If the bacteria in one digester start to fail, substrate from the other digester can be pumped in to re-establish the biological processes.
- By looking into the digester windows, problems can be visually identified ad addressed long before methane output is put at risk.
Multiple substrates create significant additional revenue
Biogas Energy digesters can easily treat wastes other than manure to greatly increase methane production. Whereas manure produces 25 m3 of biogas per ton, corn silage produces 190 m3 per ton, and grease produces a whopping 961 m3 per ton! Therefore, measuring energy production in cows/kW loses meaning since it doesn't account for non-cow sources of substrate. Even small amounts of substrates in addition to manure add significant methane production to the operation and add to the bottom line.
Flexibility in gas storage and generation capacity
Biogas Energy digesters have biogas storage built into their roofs to increase efficiency and provide a buffer between methane production and consumption. Since the gas-store can hold several hours of gas, the CHP unit can be turned down during off-peak generating times without loss of biogas. The stored biogas can then be burned during high-peak electricity demand hours to maximize revenue efficiency. In addition, the gas store provides a steady supply to the generator during peaks and troughs in methane production, thereby increasing efficiency, reducing wear on the generator, and eliminating waste.
Ease of access within tank
Biogas Energy digesters have roofs which can be folded open and closed again within minutes to give access within the digesters. The roofs are sturdy enough to withstand Wisconsin winters where it regularly stays at -20F, yet are simple to operate and maintain. Simply unfold the roof when needed, then re-secure the roof to have the digester operating again in minutes.
Monitors and controls
Biogas Energy digesters have a biogas analyzer that continuously monitors CH4, CO2 and H2S, and can be checked remotely by computer. Any changes in the biogas composition are instantly detected to prompt the appropriate action, i.e. adjusting agitators, adding buffer materials, etc. The quick response time means better methane production and disaster prevention. The biogas analyzer is also used to optimize the biocatalytic gas cleaning system. Ph meters can also be installed.
Manual adjustments
Biogas Energy facilities are built with a working platform and viewing windows to set the mixing devices at optimum positions and for early detection of process-related biological changes inside the digester (e.g. formation of foam or crust). With simple ways to control the processes within the digester, operators ensure that maximum efficiency and production are maintained.
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