Closed-loop gasification units

August 18, 2009
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Aug. 18, 2009 — One person’s trash is another person’s treasure, or environmentally friendly fuel source.

Senreq LLC engineers waste gasification systems. Using any source of waste as a feedstock, its units can produce significant heat for a greenhouse. It’s estimated 64 tons of municipal solid waste can provide 476 gigajoules of energy per day. “That is enough to meet peak demand for a 12-acre poly range in southern Ontario,” notes Canadian company president Dan Vanderburg.

senreq_demo_plant

This facility is a demonstration plant owned by Senreq. It has a capacity of three tons per day. The container in the background is the primary, where the waste is loaded into the hatch (which is open in the picture). The container in the foreground is the secondary where the syngas is combusted. The 1800˚F air that leaves the secondary is then passed through a heat exchanger. PHOTO COURTESY SENREQ

A typical ton of garbage contains about 9.5 gigajoules of energy, and the Senreq LLC system can deliver 70 per cent of that to the customer in the form of hot water.

The system also has the capability to sequester liquid carbon dioxide for use in the house and resale on the market. The company offers a range of ownership packages.

Gasification of solid waste is an emerging technology based on simple physics. Gasification has been in use for over 100 years. The current waste management issues, and energy costs in North America, have encouraged waste-to-energy technologies to come to market. “Senreq has refined the process, developed several patented processes, and brought to the market an environmentally sound, and economically viable waste to energy system,” says Vanderburg.

senreq_cotton_plant

This Senreq system is operated by cotton growers in Moscow, Kansas. The system, with a capacity of 25 tons per day, gasifies cotton burr to run the cotton gin. PHOTO COURTESY SENREQ

The greenhouse industry is a particularly symbiotic mate for gasification. Municipal solid waste (MSW) is readily available as a primary feedstock. Liquid carbon dioxide can be sequestered and sold on the open market. The energy is recovered in the form of hot water, and can be integrated into existing hot water storage tanks. As well, the grower can dispose of all on-site waste, including vines, lunch room waste, and packaging, among other materials.

Gasification is a win-win system. Utilizing MSW as a feedstock mitigates landfilling, but it also provides the grower with an additional revenue stream.

Senreq says the emissions are well below the new Canada-wide standards, as well as Ontario Guideline A7.

For more information, contact Dan Vanderburg at 705-879-2414, or e-mail This e-mail address is being protected from spambots. You need JavaScript enabled to view it .


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