City Selects Nexterra to Develop Biomass Gasification System

Mayor Dannel P. Malloy announced that the City of Stamford has selected Nexterra Systems Corp. to develop a biomass gasification system for the Stamford Water Pollution Control Authority. The proposed system will supply Stamford with clean renewable thermal energy from a sustainable source, a move that will eventually reduce Stamford’s fuel cost and dependence on […]

Mayor Dannel P. Malloy announced that the City of Stamford has selected Nexterra Systems Corp. to develop a biomass gasification system for the Stamford Water Pollution Control Authority. The proposed system will supply Stamford with clean renewable thermal energy from a sustainable source, a move that will eventually reduce Stamford’s fuel cost and dependence on non-sustainable sources of energy. The proposed biomass system will also provide Stamford with a sustainable solution for waste management that reduces our environmental impact and carbon footprint.

The proposed collaboration between the SWPCA and Nexterra involves a gasification system that will convert biomass waste into clean burning synthesis gas or “syngas”. The syngas will be used to displace approximately 77,000 MMBtu/year of natural gas currently utilized by the SWPCA to dry wet biosolids in an existing biosolids dryer manufactured by Andritz Separation.

The collaboration between Nexterra’s gasification technology and the SWPCA will result in a decrease in fuel costs by up to $1 million per year and a reduction of greenhouse gas emissions by approximately 4000 tons annually, the equivalent of taking 1000 cars off the road.

The announcement today is of the first phase of the project, which will convert wood waste into renewable energy to provide heat to the Andritz dryer. This phase is scheduled for completion by the end of 2010. Once this project is completed, future phases of the project may provide a closed loop renewable energy solution, enabling the SWPCA to use dry biosolids as the fuel source for the gasification system.

In a possible final phase, Nexterra and SWPCA intend to develop a second gasification system that will convert dry biosolids into renewable electricity. Syngas produced by gasifying biosolids will be cleaned, conditioned and fired into a GE Jenbacher internal combustion gas engine. The resulting electricity will be sufficient to meet SWPCA’s on-site power requirements making it energy independent from the grid.

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