Water reuse is becoming increasingly important in industry, food production, agriculture, aquaculture and other operations with high water use. By treating and reusing process water, companies can reduce consumption, lower operating costs and ease pressure on local water resources.
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Typical applications include reuse of process water, CIP water (Cleaning In Place), cooling water, rinse water and internal recirculation. The choice of treatment depends on water quality, the type of contaminants and the requirements placed on the reused water.
Not every stream can be reused directly, but water use can often be reduced substantially with filtration, biological treatment, UV disinfection, ozone, activated carbon, membrane processes or reverse osmosis.
Common applications
- Industrial process-water reuse
- CIP systems and cleaning water
- Food production
- Aquaculture and RAS plants
- Cooling and heating systems
- Wash and rinse processes
- Irrigation and water supply
Benefits of water reuse
- Lower water consumption
- Lower discharges and wastewater volumes
- Lower operating costs
- Greater resilience during water scarcity
- Less dependence on external supply
- Contribution to circular water use and sustainability goals
How is reused water treated?
Depending on the end use, one or more of the following technologies may be used:
- Filtration
- UV disinfection
- Ozonation
- Activated carbon
- Ion exchange
- Reverse osmosis
- Degassing and aeration
- Remineralization
Coming content
This knowledge guide will be expanded with:
- Water reuse risk assessment (tool)
- CIP optimisation and recovery
- Industrial water loops
- Membrane-based recovery systems
- PFAS and micropollutants
- Regulatory requirements and quality control
- Practical examples from industry and treatment plants
This article is under ongoing development and will be updated with further information and practical examples.