WHAT IS GREY WATER?
Water from sinks, showers, kitchens, and laundries within a facility is called grey water. This water is collected separately, treated, and used for garden irrigation, outdoor cleaning, and toilet cisterns. Grey water treatment is a recovery method.
WHY?
To address the reduction of water resources, protect the environment, and ensure the sustainability of resources; grey water is collected separately, properly treated, and reused.
HOW?
The treatment methods for grey water are listed below.
- Simple treatment (coarse filtration and disinfection)
- Chemical treatment
- Physical treatment (sand filter, activated carbon, Membrane (UF, Reverse Osmosis, etc.))
- Biological treatment (biological aerated filters, membrane bioreactor MBR)
- Others (artificial reed beds, plant-based methods)
The treatment method selected for the reuse of treated grey water must meet the following criteria.
- Removal of organic substances in the water,
- Removal of solid particles in the water,
- Reduction of the microorganism load remaining in the water.
NOTE: The treatment method is chosen based on where the treated grey water will be used, legal regulations, characteristics of the treated water, and needs.