Sewage Sludge Treatment

The disintegration of excess sludge as an effective means of reducing disposal costs is becoming increasingly important. Among existing techniques, ozone achieves a very high degree of disintegration in sewage sludge and is already being used in wastewater treatment plants on an industrial scale.

By using ozone, the cell walls of the microorganisms are destroyed and the cell constituents are released. The disintegrated sludge then serves as an external C-source for denitrification. Apart from the reduction of the surplus sludge amount, a considerable improvement in the sludge settling behaviour as well as an avoidance of foam formation was shown during the operation of the system.

The special feature of using ozone compared to mechanical disintegration techniques is that difficult-to-remove compounds are partially oxidized by the ozonation process, and are thus opened to biological disintegration.  In this way, the use of ozone enables high disintegration degrees of up to 35%.

Matching WEDECO Ozone systems

ITT Expertise