Title: A Statement Regarding an Overview of Reverse Osmosis in Florida
CITATION THUMBNAILS PAGE IMAGE ZOOMABLE
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/WL00004179/00001
 Material Information
Title: A Statement Regarding an Overview of Reverse Osmosis in Florida
Physical Description: Book
Language: English
 Subjects
Spatial Coverage: North America -- United States of America -- Florida
 Notes
Abstract: Jake Varn Collection - A Statement Regarding an Overview of Reverse Osmosis in Florida (JDV Box 43)
General Note: Box 18, Folder 3 ( Treatments of Water - 1983 ), Item 3
Funding: Digitized by the Legal Technology Institute in the Levin College of Law at the University of Florida.
 Record Information
Bibliographic ID: WL00004179
Volume ID: VID00001
Source Institution: Levin College of Law, University of Florida
Holding Location: Levin College of Law, University of Florida
Rights Management: All rights reserved by the source institution and holding location.

Full Text





A STATEMENT REGARDING AN OVERVIEW OF

REVERSE OSMOSIS IN FLORIDA



Prepared for the Special House of Representatives Water Task Force



IT IS AN HONOR AND A PLEASURE TO APPEAR BEFORE THE SPEAKER'S WATER

TASK FORCE AND TO ASSIST YOU IN YOUR SEARCH FOR INFORMATION CONCERNING

REVERSE OSMOSIS. I BELIEVE THE HOUSE OF REPRESENTATIVES HAS BEEN

KEEPING ABREAST OF THE TECHNOLOGY IN THE PAST AS I HAVE PRIVY TO A COPY

OF A REPORT ON REVERSE OSMOSIS PREPARED BY THE SUBCOMMITTEE ON OVERSIGHT,

COMMITTEE OF NATURAL RESOURCES, THE FLORIDA HOUSE OF REPRESENTATIVES,

DATED OCTOBER 15, 1982. WHILE THE REPORT IS VERY INFORMATIVE, IT IS NOT

COMPLETE AND SHOULD BE UPDATED TO REFLECT THE ADVANCES TAKING PLACE IN

THIS RAPIDLY CHANGING TECHNOLOGY.

I HAVE TAKEN THE LIBERTY OF MAKING COPIES OF AN ARTICLE ENTITLED

"DESALTING WATER IN FLORIDA" WHICH APPEARED IN THE MARCH, 1983

JOURNAL OF THE AMERICAN WATER WORKS ASSOCIATION, WHICH WAS AUTHORED BY

GLEN M. DYKES, P.E., OF THE FLORIDA DEPARTMENT OF ENVIRONMENTAL REGULA-

TION. THE PAPER GIVES AN OVERVIEW OF THE DESALTING TECHNOLOGY AS IT

RELATES TO FLORIDA. THERE ARE SOME INACCURACIES AS TO THE PLANT MANU-

FACTURER'S TYPE OF PLANT AND PLANT CAPACITY. HOWEVER, THE PAPER DOES

PRESENT AN UPDATED INVENTORY OF DESALTING FACILITIES IN FLORIDA.

AS YOU CAN SEE FROM THE INTRODUCTION AND FROM OUR COMPANY'S EX-

PERIENCE, MEMBRANE TECHNOLOGY HAS ADVANCED CONSIDERABLY IN THE PAST 12

YEARS. IN 1971, WHEN THE FIRST LARGE REVERSE OSMOSIS FACILITY WAS IN-

STALLED IN FLORIDA, OPERATING PRESSURES WERE IN THE AREA OF 650 psi.

LATER, IN 1974, PRESSURES WERE BEING REDUCED TO 550 psi. SOON THEY WERE









AT 400 psi AND NOW, WITH THE ADVENT OF LOW PRESSURE REVERSE OSMOSIS FOR

TREATING BRACKISH WATER, 250 psi SYSTEMS WILL BECOME COMMONPLACE.

ALTHOUGH MEMBRANE ADVANCES ARE STILL EXPECTED, IT IS NOT BELIEVED

THAT PRESSURES WILL BE REDUCED BEYOND A 200 psi LEVEL. THESE LOWER

PRESSURE SYSTEMS ARE NOW PROVEN TO REDUCE ENERGY COSTS AS MUCH AS 40%.

IN THE CASE OF VENICE, FLORIDA, WHERE A 400 psi SYSTEM WAS EXPANDED WITH

A 250 psi SYSTEM, BOTH ENERGY AND SPATIAL SAVINGS HAVE BEEN ACHIEVED.

IT IS ANTICIPATED THAT THE SPATIAL SAVINGS WILL BE FURTHER INCREASED BY

AT LEAST 60% WITHIN THE NEXT FIVE YEARS. IMPROVED MEMBRANES WILL ALSO

ALLOW HIGHER RECOVERY RATES AND REDUCED CONSUMPTION OF PRE-TREATMENT

CHEMICALS.

IN ADDITION, PILOT PROGRAMS ON THE USE OF NEW ANTISCALANT PRE-

TREATMENT CHEMICALS FOR R.O. HAVE PROVEN TO BE MORE EFFECTIVE IN RE-

DUCING FOULING OF MEMBRANES AND THESE NEW CHEMICALS MAY REDUCE THE

AMOUNT OF ACID AND SEQUESTERANTS USED IN THE MEMBRANE PROCESS. IN THE

LAST TWO DESIGNS OF LOW PRESSURE SYSTEMS WHICH OUR COMPANY RECENTLY

COMPLETED, ENERGY RECOVERY IS A PART OF THE DESIGN. ENERGY RECOVERY IS

ACCOMPLISHED BY PLACING A TURBINE IN THE BRINE OR CONCENTRATE LINE WHICH

GOES TO WASTE, RECOVERING AT HIGH PRESSURES ENERGY THAT WOULD NORMALLY

GO TO WASTE. IN THESE LAST TWO DESIGNS, 25% OF THE HIGH PRESSURE EX-

PENDED IN THE TREATMENT WILL BE RECOVERED. AT VENICE, FLORIDA, WE

SPECIFIED HIGH EFFICIENCY VERTICAL TURBINE PUMPS, WHICH ALSO GAINED AN

ADDITIONAL 6% EFFICIENCY, WHICH RESULTED IN FURTHER ENERGY SAVINGS.

THE MATERIALS OF CONSTRUCTION UTILIZED IN THESE NEW PLANTS CONSISTS

OF FIBERGLASS, STAINLESS STEEL, EPOXY, PVC, AND OTHER SYNTHETIC MATE-

RIALS. THE USE OF THESE MATERIALS ARE EXTENDING THE USEFUL LIFE OF THE

OVERALL CAPITAL INVESTMENT AND INSURING SYSTEM RELIABILITY AND LOW

MAINTENANCE.










ALSO, BECAUSE OF THE GREAT ADVANCES IN THE ELECTRONICS FIELD IN

RECENT YEARS, THE INSTRUMENTATION AND CONTROL OF THESE NEW SYSTEMS WILL

ENHANCE THE OPERATION AND DATA GATHERING AT THE FACILITIES. THE USE OF

MICROPROCESSORS AND DATA LOGGERS HAS MADE THIS POSSIBLE.

HOWEVER, ONE SHOULD BE CAUTIOUS IN SELECTING PROCESSES FOR MUNICIPAL

FACILITIES, INASMUCH AS THE EVALUATION TO DETERMINE WHETHER OR NOT A

DESALTING PROCESS OR A CONVENTIONAL PROCESS SHOULD BE UTILIZED MUST BE

ON A SITE-SPECIFIC BASIS.

IN ADDITION, THE ENERGY SITUATION IS SOME WHAT UNPREDICTABLE AND,

SINCE THE REVERSE OSMOSIS PROCESS IS ENERGY INTENSIVE, ONE MUST CONSIDER

THE FUTURE COST OF ENERGY WHEN WEIGHING A MEMBRANE TECHNOLOGY AGAINST A

CONVENTIONAL PROCESS. IT WAS RECENTLY PROJECTED THAT BY THE YEAR 2000

ENERGY COSTS IN FLORIDA MAY BE AS HIGH AS 30 CENTS A KILOWATT HOUR.

THIS DOES NOT MEAN A WHOLE LOT IF ALL OTHER COSTS ARE RELEVANT.

HOWEVER, IF THE ENERGY COSTS GO UP EXCESSIVELY IN PROPORTION TO ALL

OTHER COSTS, THEN REVERSE OSMOSIS, IN SPITE OF ITS ADVANCES, MAY NOT BE

AS COST EFFECTIVE AS OTHER PROCESSES IN THE FUTURE. IN THE SAME LIGHT

ENERGY COSTS WILL ALSO AFFECT THE OPERATION AND MAINTENANCE COST IN

OTHER PROCESSES.

AGAIN, THANK YOU FOR THIS OPPORTUNITY TO COME AND SPEAK TO YOU. AT

THIS TIME I WILL BE HAPPY TO TRY TO ANSWER ANY QUESTIONS YOU MAY HAVE

CONCERNING REVERSE OSMOSIS.




University of Florida Home Page
© 2004 - 2010 University of Florida George A. Smathers Libraries.
All rights reserved.

Acceptable Use, Copyright, and Disclaimer Statement
Last updated October 10, 2010 - - mvs