Calder ERT energy recovery turbines are designed and manufactured specifically for reverse osmosis desalination. They can recover as much as 90% of the hydraulic energy remaining in the brine stream, converting it into rotary power for the high-pressure pumps. Highly efficient and reliable, Calder ERTs are installed in nearly 1000 seawater and brackish water reverse osmosis plants worldwide, with a total installed capacity in excess of 350 MW.
Calder ERTs are designed to operate with either centrifugal pumps or positive displacement pumps and may be direct coupled to motors or pumps at speeds up to 3600 rpm. A range of standard turbines are available with a power recovery potential up to 1.5 MW. Larger units are available as engineered product built to suit seawater and brackish water applications.