Activated Sludge

Improve the efficiency of your activated sludge process with our highly reactive natural mineral solutions.

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Stabilize your activated sludge for improved process efficiency 

Efficient wastewater treatment processes rely on optimal conditions for the biology in the activated sludge. Our natural mineral solutions not only provide and maintain the optimal pH but create a perfect buffer and ideal environment for the bacteria to operate.

Our products increase efficiency and save costs in the activated sludge process by improving floc sedimentation and sludge dewatering.

Enhanced biological performance

Our natural mineral products provide the ideal environment for nitrifying bacteria, which require the pH to be in the range of 7-8 for full efficiency.


Nitrification acidifies the activated sludge process, which slows the nitrification rate, increases levels of suspended solids and leads to concrete corrosion in basins and pipes. Omya’s products stabilize the nitrification process.

water treatment activated sludge

Simpler process operations 

Our products provide a natural buffering effect, which prevents overdosing and maintains a stable operation. 


The calcium ions in our products are integrated into larger, denser flocs, improving settling, reducing the sludge volume index and leading to clearer effluent. 

Waste Water Treatment

Improved safety for operators 

Omya products are made from natural minerals which are non-hazardous and therefore safer to handle, store and dose than the commonly used alternatives of caustic soda and lime.


No special safety measures are required, which reduces the amount of training and number of safety procedures required. 

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Not all products are registered for use in all markets. Check with your local Omya representative or contact us for more information.

Type of industries

Omya works with a wide range of industries to optimize water treatment processes, sustainability and cost.

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Water treatment consultancies

Omya offers consultancy and technical support to customers, from the assessment of site-specific issues to the recommendation and implementation of proven solutions.
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Talk to an expert

For information or advice, please contact us now.