Current developments with the activated sludge processes with highly concentrated effluents highlight the requirement to (a) reduce energy usage (b) promote the production of high quality effluent.

Having observed the efforts being made to improve plant performance we became aware that current methods had to be improved. It was also noted that a period of stagnation had occurred in the development of effective aeration systems.

Improved aeration methods are needed which would allow for oxygen transfer efficiencies to be greater than 2kg/kWh. Such oxygen transfer rates should be continually variable in line with the oxygen demand prevailing at any given time.

In our study of activated sludge plants we found that operational and electrical/mechanical maintenance was proving to be time consuming and very costly.

With these problems in mind we have designed and developed the Fine Bubble High Density Diffuser System.

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