During November 2019, the rotor drive to Lime Softening Unit No. 2 failed rendering it inoperable. During that time, only Lime Softening Unit No. 1 was operable. Lime Softening Unit No. 1 does not have sufficient capacity to soften water to meet average demand. The rotor drive originally designated for the rehabilitation of Lime Softening Unit No. 3 was used to resolve the emergency with Lime Softening Unit No. 2.
Lime Softening Unit No. 3 (LSU3) is the largest of the three (3) softeners and cannot properly soften water and reduce color without the drive. The rehabilitation of LSU3 is critical for softening raw water and allowing the Riviera Beach Utility Special District to begin rehabilitation of the remaining two softening units. A rotor drive, which is an essential component for mixing lime with raw water, takes about 6 months to manufacture and deliver. LSU3 is scheduled to start-up in June 2020.
Unless the new drive is ordered on an emergency basis, its rehabilitation could face significant construction delay. The plant currently lacks redundancy, as evidenced by Lime Softening Unit No. 2 shutdown in November 2019.