Abstract
Following a brief outline of the status of pollution control in Ontario, the paper examines recent developments in wastewater technology as applied to plant performance, secondary treatment, and sludge processing.Modelling, automatic control, addition of pure oxygen, land disposal, and sludge dewatering are among the new approaches to the design of treatment facilities that are described; their limitations are noted and their application in Canada is considered.Increasing public concern and decreasing resources will force serious consideration of new methods to improve treatment reliability and efficiency. Technology, judiciously employed, can be one of the most effective ways of protecting our environment.
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