Grey water (also referred to as greywater, graywater and gray water) is “gently used” water from the showers and lavatory sinks. It is also a great source of water for on-site reuse.
Greywater management for better use
When people think about greywater management irrigation is often thought of as the primary use. While toilet flushing is a common use of treated grey water, most residential buildings generate enough raw grey water to meet 100% of the toilet flushing demand and still have plenty left over for other non-potable applications.
A commercial residential building can generate enough greywater to meet the needs of toilet flushing, irrigation and possibly even offset cooling tower make-up. However, a system should be in place to treat the water properly so it does not pose a public health risk.
Properly treated grey water can easily be used for flushing toilets, which can save up to 50 liters of water per day. It is recommended that the raw grey water be filtered and sanitized to a level that is safe for public use. If you are using this water for irrigation, it is recommended to not irrigate crops or plants that are you are going to consume uncooked. It would also be advised to not use greywater for seeds.
To get a proper greywater management system, you should contact the experts in your area. They will help you understand the local regulations, treat your wastewater to make it less contaminated, and set up the best way to use water wisely!