Turbine Fuel Valve Upgrade – Primary & Secondary

ES2 recently replaced the primary and secondary (Versa & Singer) valves on a Solar Centaur 40 turbine at a LFGTE plant. The two existing valve trains were removed prior to the loader valves and formed into one fuel train with a tee setup to disperse gas evenly into the two existing loader fuel control valves. The four Versa and Singer valves were replaced by two 2″ stainless steel full port ball valves with pneumatic actuators. The site noted only a 1/2 PSI pressure drop across the new fuel train down from the 10-15 PSI pressure loss they had with the Versa & Singer valves. This resulted in a decrease in the plant’s parasitic load, and an increase in turbine performance by improving their flow capacity without exceeding the turbine’s flow limit.

Adam C. DeRobbio, Process Technician ES2 Inc.


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Landfill Gas Booster Station

ES2 recently designed, programmed, built, and installed a control system for an existing landfill gas booster station. Having experience both as a LFG technician and LFG turbine plant manager, I began thinking about the booster skid and how it was being applied. A question came to mind, how many other landfills across the country can use a booster station to change the flow dynamics of their well field and apply much needed vacuum to the backside their landfills? I have traveled to a variety of sites over the past few years that have a difficult time maintaining applied vacuum on the backside of their landfills, which presents difficulties like lack of gas for a renewable energy project or perhaps one of the most daunting issues for landfills – gas odor. In a perfect world your GCCS piping was sized correctly and you have plenty of collection horsepower on the front end with your blowers, and high pressure compressors if applicable. However, this is not a perfect world and sometimes we have to adapt to keep things in harmony. A booster station can increase vacuum to the backside of the landfill, reduce strain/parasitic load on your collection blowers/compressors, and give you the flexibility to change the flow dynamics of your well field with a simple pipe and valve manifold pre and post booster station. All things to consider when upgrading or modifying an existing gas collection and control system.

Adam C. DeRobbio, Process Technician ES2 Inc.


Landfill Gas Control Systems

We have found that many landfills are looking for an alternative to control systems provided by major equipment manufacturers. Whether it is due to inflated pricing, lack of competition among manufacturers, or the need for something more customized to fit the customer’s preference. Many manufacturers simply cannot provide a customized control system. ES2 provides control systems for a variety of landfill gas collection and treatment processes that fit our customer’s needs. From enclosed and candlestick flares to landfill gas compressor skids and gas conditioning systems, ES2 will customize a control system to any customer specification. Not quite sure what you are looking for? That’s OK, at ES2 we have experts in the field of landfill gas and leachate collection and control.  We can outline some basic and/or advanced control packages for your system free of charge. For more information, please feel free to call us toll free at 1-877-766-2372.

Adam C. DeRobbio, Process Technician ES2 Inc.