High Efficiency High Tds Effluent Evaporator

Reverse Osmosis (RO) water treatment technology has been used for years in various industries to separate dissolved solids from water by forcing the water through a semipermeable membrane. RO reject water disposal is also commonly used to purify drinking water and desalinate seawater to yield potable water. The water and other molecules with lower molecular weight (specific weight of molecules allowed to pass through is dependent on the selected membrane) pass through the micropores in the membrane, yielding a purified water stream called the permeate. Larger molecules are retained by the membrane as well as a portion of the water that does not pass through the membrane. This concentrated stream is called the concentrate or RO reject. The RO Reject Water Evaporation System converts the water portion of water-based waste to water vapor, while leaving the higher boiling contaminants behind. This greatly minimizes the amount of waste that needs to be hauled off-site. Using Evaporators to Dewater Reverse Osmosis Reject Streams
In industrial settings, RO is often used to remove total dissolved salts (TDS) from industrial wastewater or treated industrial wastewater and yield permeate with relatively low TDS concentrations.
While RO is an effective method for handling wastewater, what to do with the concentrate or reject water (typically as much as 20-50% of the RO feed water volume) can be an issue. Specifically, the high salinity in RO reject / RO concentrate can make it prohibitive for discharge to a local sewer facility. Hauling the wastewater to a treatment facility can also be prohibitively expensive.
Evaporation technology has always been more a hands offa than other wastewater treatment methodologies resulting in a dramatically lower labor cost. Evaporation technology can handle a much wider range of waste streams compared to membranes and traditional physical / chemical treatment methodologies. Finally, evaporation does a much better job of concentrating waste streams compared to other methods, thereby yielding a lower disposal volume and cost.