Reuse of Gypsum from Flue Gas Desulphurisation

Summary

Lambton TGS, Ontario Hydro has installed wet limestone flue gas desulphurisation scrubbers with in-situ forced oxidation on two of its coal fired utility boilers in order to remove 90% of the flue gas sulphur emissions. This scrubbing process produces gypsum which can replace mined or quarried gypsum in most of its usual applications. Although this synergy is not currently in place, extensive studies are being conducted to ensure the project is successful.

Industry

Industry Sector	Specific Industry
Energy utility sector	Ontario Hydro
Building & construction sector	Westroc Industries Ltd. (building material manufacturer)

Region

Sarnia-Lambton, Canada.

Applied Technologies

• Not known

Triple Bottom Line Aspects (direct at operational level)

Economic	Reduction or avoidance in disposal costs Savings for raw material purchase costs for Westroc Industries Ltd
Environment	Reduce amount of raw materials used and associated mining Less atmospheric SOx emissions
Social	Potential employment opportunities

Additional Comments

None.

References

• Venta, G. and M. Nisbet (1997) "Opportunities for Industrial Ecological Parks in Canada, Case study: Sarnia-Lambton Industrial Complex", Environment Canada.

Last Update

18 January 2007