American Biogas Council´s Project of the Year - Case Study

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Courtesy of EnviTec Biogas AG

Location: Stanley, New York
Capacity: 541 kWel
Input materials: Manure from 1,500 Holstein dairy cows, feed refusal, yogurt processing wastes, food waste
Features: Since 2014, the average degree of capacity utilization exceeds 91%.

The biogas facility in Stanley

The biogas plant Lawnhurst Energy, LLC located in Stanley, N.Y. is EnviTec’s first project in the United States. Donald N. Jensen II, who is the owner of Lawnhurst Farms, LLC, a family run dairy farm in operation since 1925 contracted with EnviTec to plan, design and oversee construction of this biogas facility.

Project impetus was to prepare the Jensen family farm for the fourth generation of operation, to allow the farm to control traditional overhead costs and to be environmentally conscious by properly handling manure generated from farm operations. Collectively the digester facility gives the farmers better control of their total operational package.

Input feed stocks consist of the daily manure from approximately 1,500 Holstein dairy cows, feed refusal, yogurt processing wastes and food waste. After the start-up in August 2013, the biogas facility produces, under full load, an electrical output of 541 kW and a heat output of 1,109 MBTU per hour. Since beginning of 2014, the average degree of capacity utilization exceeds 91%.

EnviTec’s advanced anaerobic digester technology brings to the U.S. market such innovative features as an automatic CHP oil replacement system, underground cooling of biogas, and inside digester removal of excess hydrogen sulfide. This facility also boasts of submerged digester mixers which are easily serviceable. The whole digestion process is fully instrumented and monitored.

The Jenbacher CHP is providing all the farm’s electrical needs, excess electricity is being wheeled 24/7 back to the municipal electrical grid. Hot water, produced by the CHP, is being used to heat farm buildings. Hot water from the CHP is also being used for process needs in the milking parlor. Excess hot water and electricity is also available for peripheral farm operations. Dewatered and dried (from the CHP hot water heat) digestate is being used as bedding back in the barns. Dewatered liquid (liquid fertilizer) will be applied back on the fields as fertilizer in place of the past practices of spreading manure.

In 2014, Lawnhurst Energy, LLC won the “Agricultural Biogas Project of the Year Award” for excelling in the criteria of innovation, technology and sustainability. The price was awarded by the American Biogas Council.

American Biogas Council´s  Project of the Year - Case Study

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