Start Date: November 2004
Completion Date: January 2005
Client: Aerex® Industries, Inc
Aerex® Industries, in an effort to meet the requirements of several forth coming membrane projects, designed and built a pilot unit for testing low to medium TDS brackish water. Overall recoveries of up to 90 percent can be achieved by using raw water blend and concentrate recycle.
The raw water booster pump is designed to be operated when the water source has insufficient pressure to feed the high pressure feed pump and also functions as the membrane cleaning pump. Chemical feed systems have been incorporated into the process design for the addition of acid for pH adjustment and scale inhibitor. Additional pretreatment is provided by the feed water cartridge filter housing in FRP construction, containing (6) 20” – 5 micron filters. Panel mounted rotometers have been installed for first and second stage permeates, blend, recycle and concentrate. Flow control valves are included on each of these steams for precise measurement and control.
Instrumentation includes a two-channel pH/ORP monitor/transmitter, a two-channel conductivity monitor/transmitter. Pressure gauges equipped with selector valves are provided to measure the filter inlet and outlet, first and second stage permeate, feed, interstage, and concentrate pressures. For precise control, the unit uses a vertical centrifugal pump in 316 SS construction, controlled by a variable frequency drive. For additional flexibility in pilot testing, the unit has been set up in a 2-2-1-1 array using 4”-4 element pressure vessels in a wrap around design.
The system is controlled through the use of an Allen-Bradley PLC for normal operation and monitoring the alarm circuits.
Start Date: May 2005
Completion Date: November 2005
Client: City of Lake Worth, Florida
The City of Lake Worth contracted with TLC Diversified Construction Group to provide and install a new 25,000 gallon per day pilot unit. TLC contracted Aerex® Industries to design and manufacture the two-stage 25,000 gallon per day pilot unit.
Koch TFC 4820XR extra high rejection, brackish water reverse osmosis membrane elements, Protec PRO 4-300-SP, high temperature, ASME code stamped pressure vessels, Grundfos pumps and Rosemount instrumentation are just a few of the major components used in construction. The pilot unit frame was fabricated using Extren extruded structural fiberglass shapes. Feed and concentrate piping were fabricated using 316 stainless steel.
Aerex’s® scope included everything from design, to fabrication, to programming and onsite installation. Aerex® provided engineering support and construction for this project at our Fort Pierce, Fla. facility
Start Date: March 2005
Completion Date: September 2005
Client: Collier County, Florida
As Collier County planned to expand their south membrane treatment plant, they decided to do pilot testing on site to determine the optimum design. Therefore, based on the concept of Hazen and Sawyer consulting engineers, Collier County contracted with Aerex® Industries, Inc. to design and build a three stage 25,000 GPD pilot plant.
This state of the art pilot system incorporates Dow BW30 brackish water membranes, Codeline 40A60 pressure vessels, GE Quick Panel operator interface, Allen Bradley programmable logic controller and Endress + Hauser instrumentation. The pilot unit frame was fabricated from powder coated aluminum with the third stage 2 ½” diameter pressure vessels made by Aerex® from 316 stainless steel.
Aerex’s® scope included design, fabrication, programming and installation. Collier County provided a special trailer to house the pilot unit to permit ease of entry and operation. Aerex® provided project design engineering, management and field service from our Fort Pierce, Fla., headquarters.