OPTI Canada uses Zimpro WAO system to destroy wastewater soot from syngas production

Feb. 15, 2007
OPTI Canada's Long Lake Project, a joint venture with Nexen in northern Ontario, needed a system that would reduce costs associated with landfill disposal and waste for the "next generation" oil sands development. Combining steam assisted gravity drainage (SAGD) with OPTI Canada's OrCrude technology, hydrocracking and gasification, this system produces a premium synthetic crude oil. A Siemens Zimpro wet air oxidation (WAO) system was chosen to treat soot slurry, a byproduct of the process...

WARRENDALE, PA, Feb. 15, 2007 -- OPTI Canada's Long Lake Project, a joint venture with Nexen in northern Ontario, needed a system that would reduce costs associated with landfill disposal and waste for their "next generation" oil sands development, which integrates established and proprietary technologies.

Combining Steam Assisted Gravity Drainage (SAGD) with OPTI Canada's proprietary OrCrude™ technology, hydrocracking and gasification, this system produces a premium synthetic crude oil. The Long Lake Project is expected to produce 58,500 b/d of products, primarily 39° API premium sweet synthetic crude oil.

Asphaltenes from the OrCrude process go into a gasifier, which produces syngas (a mixture of carbon monoxide and hydrogen used to generate the steam required for the SAGD process and to further upgrade the synthetic crude) and a soot waste product -- which requires off-site disposal.

A Zimpro® wet air oxidation (WAO) system was chosen to treat the soot slurry for its ability to:
• Dramatically reduce the amount of wastewater solids requiring off-site disposal
• Make valuable metals in soot available for recovery as a potentially valuable product.
• Wet oxidation is the oxidation of soluble or suspended components in waste water using oxygen as the oxidizing agent. When air is used, the process is referred to as wet air oxidation. Zimpro Wet Oxidation and WAO systems are used primarily for treatment of high strength industrial wastewater streams.

Adding the Zimpro wet air oxidation unit to the gasification process will reduce soot volume to about 10% of its original volume, substantially reducing the amount of material to be disposed. Ultimately, the system reduces costs associated with landfill disposal and waste. In addition, the Zimpro wet air oxidation system will allow the recovery of valuable materials present in the soot, like nickel and vanadium.

For more information on the Long Lake Project, click here.

To read the full technical article (PDF), click here.

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Also see: "Siemens Trident system replaces aging Hudson, N.Y., water treatment plant to meet new regulations"

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