Ener-G offers AD service to industrial processors

By Chris Hanson | November 06, 2013

Ener-G has launched an outsourced anaerobic digestion (AD) service that includes the design, installation and operation of the renewable energy facilities for a variety of industrial processors.

The service, financed by Ener-G, will provide customers with less financial risks and little to no upfront costs to incorporate AD technology in industrial processes that produce a liquid effluent stream of at least 3,000 kilograms of chemical oxygen demand (COD) each day. Ener-G would recover its investment by splitting the savings with the customer over the contract period, with customers receiving 20 to 50 percent of the annual savings.

The projects would produce biogas from industrial sites, such as brewing and distillation operations, and use it to fuel a combined-heat-and-power (CHP) engine, generating both heat and electricity. In addition to producing heat and power, the projects could reduce the COD content of effluent up to 95 percent. By reducing the COD content, facilities would be able to reduce effluent costs and offer potential water recycling after removing any solids.

“The increasing cost of waste and effluent disposal, coupled with rising energy costs and environmental legislation is prompting renewed interest in AD. Our outsourced build-own-operate model means that cash strapped companies can benefit without raiding their own capital or trying to raise finance themselves,” said Scott Tamplin, director of anaerobic development at Ener-G. “We will design, install, operate and own the complete anaerobic digestion plant – shouldering all the financial risk and sharing operational savings with customers over an agreed contract term of 10, 15, 20 or 25 years. This provides businesses with a steady and attractive income stream.”

By eliminating upfront capital needs, Ener-G hoped to garner more interest in implementing AD technology. “The U.K. processing industry has been slow to adopt anaerobic digestion, largely because of high capital cost and lack of knowledge. By removing both these barriers, we hope to accelerate deployment of AD in the sector.”

North British Distillery, one of the largest grain whisky producers in Scotland, employed a 500 kilowatt (kW) CHP system from Ener-G is able to treat 27,000 kilograms, or 59,524 pounds, of COD each day and reduced the distillery’s carbon dioxide emissions by approximately 9,000 metric tons annually.