Biogas CHP : New Application of Biomass Gasification Technology From Nexterra

Nexterra Energy has announced a development programme to commercialize a new application of its biomass gasification technology to generate power and heat from small-scale plants.The 2-10 MW systems will employ technology that directly-fires biomass derived syngas in high efficiency gas engines.

This initiative follows two years of work by Nexterra to upgrade syngas made by gasifying biomass so that it meets the fuel specification of GE Jenbacher's internal combustion engines. GE has supported this work through its Jenbacher gas engine division. Once fully developed, Nexterra's gasification technology is planned to be combined with GE's Jenbacher gas engines to form modular biomass combined heat and power (CHP) plants.The scale of individual plants will range from 2-10 MW and will yield net efficiencies of up to 60% in cogeneration mode.

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Uses of Small Scale Anaerobic Digesters

The use of anaerobic digesters on a small scale could provide localized energy sources. while reducing the negative effects of greenhouse gases. While many technologies appear to answer some of these requirements, anaerobic digestion is an especially promising technology as it is efficient, inexpensive and can be quickly scaled and implemented.

In engineered anaerobic digesters, the digestion of organic waste takes place in a special reactor, or enclosed chamber, where critical environmental conditions such as moisture content, temperature and pH levels can be controlled to maximize gas generation and waste decomposition rates. Commercial anaerobic digestion systems can replicate this natural process in an engineered reactor that produces methane gas much more quickly, in as little as two to three weeks compared to the 30 to 100 years required by the anaerobic conditions in a landfill.

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