Industrial water and waste treatment

Adopting circular business models is vital for sustainable operations, especially when industrial processes entail substantial water usage. Embracing circularity through efficient water treatment and investing in methods supporting the reuse, recycling, or sale of waste by-products not only saves costs but also generates new revenue streams. Alfa Laval offers user-friendly wastewater treatment technologies for clean effluent, suitable either for discharge or further treatment for water reuse.

Waste water treatment plant

Alfa Laval enables you to reach your net zero emission goals by:

  • Maximizing reuse of water
  • Turning waste into value
  • Minimizing energy consumption
  • Reducing waste volume
  • Reducing footprint 

Applications overview

Alfa Laval offers a wide range of solutions within water and waste treatment for many industries and many applications. Learn how you can benefit from water and waste treatment within your specific application. 

Pulp and paper


The production of pulp and paper requires large quantities of water for virtually all the processes involved. Even with some recycling, pulp processing and paper making still require large quantities of fresh water. Alfa Laval provides both the process equipment and the know-how to help you minimize water consumption and optimize the economics of your wastewater treatment.

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Steel and COG


Decanter centrifuges are widely used for dealing with dust arising from blast furnaces, basic oxygen furnaces, sintering plants, and other molten metal operations. Removing water from the wet scrubbing slurries and recovering and recycling the resultant solids make it possible for you to generate important additional revenue flows. Alfa Laval decanter centrifuges are also used extensively for dewatering sludge that result from wastewater treatment operations prior to disposal so that the water can be reused.

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The combustion of coal in power generation facilities produces SO2 that is emitted to the atmosphere. Flue gas desulfurization (FGD) is widely used by power plants to remove SO2 from flue gas. Wet scrubbing by limestone, the most common technology used in FGD system, generates gypsum as a by-product as well as wastewater which both need to be treated prior to reuse or disposal. Alfa Laval decanter centrifuges are a proven solution for gypsum and wastewater sludge dewatering.

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The production of chemicals generates a significant amount of wastewater that is mainly coming from aqueous discharges of manufacturing processes. Discharges from equipment and production workshop washing and cleaning and collection of rainwater from contaminated areas are also generated. This wastewater contains pollutants that must be treated before it can be discharged to the environment or recycled and reused in the process. Alfa Laval decanter centrifuges provide cost-effective solutions in the dewatering of sludge generated from wastewater treatment operations.

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Oil and gas 

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The oil and gas industry generates a significant amount of wastewater from upstream and downstream activities which must be managed. Produced water is the largest waste stream generated. Produced water and other waste streams are contaminated with organic and inorganic pollutants that need to be treated before it can be reused, recycled or released into the environment. Alfa Laval decanter centrifuges provide cost-effective solution in the recovery of oil from waste stream such as slop oil and dewatering of sludges generated from wastewater treatment operations.

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The cleaning and processing of plant and animal fibres, typically cotton and wool, produce effluents especially during washing, spinning, processing, bleaching and dyeing. The waste sludges need to be dewatered to reduce disposal costs, and decanter centrifuges are usually the most economical solution. Alfa Laval decanter centrifuges are a proven solution for dewatering textile sludge produced in the process waste stream.



Animal manure from intensive agricultural operations, transportation marshalling points and winter housing is readily processed with decanter centrifuges. They offer good recovery of phosphorous in the cake and a liquid stream of high-nitrogen liquid fertilizer, both of which are generally acceptable for land application. Alfa Laval Decanter Centrifuges are a proven solution for dewatering manure sludge.



Dredging of inland waters to remove effluent disposal or improve navigation will produce a range of sludge from fine sand to organic sludge similar to Anaerobically Digested Municipal waste. These sludges are readily dewatered by decanter centrifuges prior to transport and ultimate disposal. Occasionally, previous industrial use will leave sediments with significant contamination requiring specific waste treatment. Alfa Laval decanter centrifuges are used to dewater dredging sludge for disposal to land fill or for land fertilizer application depending on the requirements.



Beer production has three large waste streams: spent grains, spent yeast and Kieselguhr/Perlite. Dewatering of grains and yeast increases the value of these two products which are mainly used for animal feed. If they are enzymatically or chemically treated, washed, concentrated and dried in a hygienic process, the resultant protein-rich products could also find a value-generating outlet in the food industry. In some countries, breweries dewater Kieselguhr/Perlite to increase its dry matter content to prepare it for disposal. Dewatering brewery waste streams with decanters reduces volumes of waste and can also result in considerable savings in transport costs. Alfa Laval decanter centrifuges are a proven solution for dewatering of the three waste streams in breweries


Process overview

With Alfa Laval as your partner, you gain the dual advantage of access to leading wastewater expertise as well as one of the broadest equipment ranges for wastewater treatment.

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Zero Liquid Discharge


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