What Should You Know About RO System Waste Water?

What is RO System Waste Water?

Reverse Osmosis (RO) systems remove impurities from drinking water by pushing it through a semipermeable membrane. However, during the treatment process, the RO membrane also rejects beneficial minerals and organic compounds, resulting in concentrated wastewater that can harm the environment if not disposed of properly.

Understanding RO Waste Water Composition

The composition of RO waste water can vary depending on the input water quality and RO system design. Typically, RO waste water contains high levels of dissolved solids, minerals, and organic compounds that are rejected by the RO membrane. It’s common to see concentrations of dissolved solids in the range of 2-5 times that of the feed water. For example, if your RO system removes 90% of dissolved solids from your feed water, the waste water will contain 10% of the original concentration, assuming a typical RO recovery rate of 80-90%.

Proper Disposal of RO Waste Water

It’s essential to dispose of RO waste water properly to prevent environmental contamination. The recommended method is to dispose of it down the drain, but only if your municipality’s sewer system can handle the increased salt load. If not, you may need to consider alternative disposal methods, such as directing the waste water to a designated septic system or greywater tank. Regular maintenance and monitoring of your RO system can help minimize waste water generation and ensure optimal system performance. Regular testing of waste water quality is also recommended to identify any potential issues and make adjustments as needed.