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HOLLYWOOD WATER TREATMENT PLANT
PLANT NAME & ADDRESS
Hollywood Water Treatment Plant
35th Ave. & Hollywood Blvd.
Hollywood FL 33032

CONTACT PERSONS
Whit Van Cott, Director of Public Utilities
Frederick Bloetscher, P.E., Deputy Director
PO Box 229045
Hollywood, FL 33022
TEL: 921-3301
FAX: 954-921-3386
EMAIL: wvancott@hollywoodfl.org

Robert Boyce, Water Treatment Plant Manager
PO Box 229045
Hollywood, FL 33022
TEL: 954-967-4230
FAX: 954-921-3386
bboyce@hollywoodfl.org

MEMBRANE SUPPLIER
Hydranautics
401 Jones Road
Oceanside CA 922054
TEL: 760-901-2500; 1-800-CPA-PURE
FAX: 760-901-2578
Contact Person: Mark Wilf, Ph. D.

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CONSULTANTS
Metcalf & Eddy     Water Consultants International, Inc.
3740 Executive Way     6950 Cypress Road #208
Miramar, FL 33025     Plantation FL 33317
TEL: 954-450-7770     TEL: 954-792-7204
FAX: 954- 450-5100     FAX:954-792-7205
Web Page:     C. Don Hornburg,CDHORN@worldnet.att.net
http://www.m-e.com     Bruce Watson:
Roberto S. Ortiz, P.E.   kffir@worldnet.att.net

SUMMARY DATA
Startup Year1995
ProcessGW: 14MGD NF; BW: 4MGD RO
Capacity (MGD)18
Recovery Rate (%)NF=85, RO=75
Pretreatmentscale inhibitor, sulfuric acid, cartridge filtration
Post-Treatmentchlorination, degassification
Feed Water CompositionBW: TDS=2200mg/L
Product Water Compositionsoft: 2 grains per gallon (35mg/L)
Concentrate Disposaldischarge to wastewater treatment plant

COSTS*
CAPITAL COST ($000)O & M COSTS ($000)
  
Building Electric Power 
Plant Equipment Steam 
Wells or feed intake O&M Personnel  
Product tanks    Parts, Chemicals  
Brine Disposal  Replacement Membranes    
Other costs  Not specified 
TOTAL18,000TOTAL 


*Source: Leitner & Associates, Survey of U. S. Costs and Water Rates for Desalination and Membrane Softening Plants, Water Treatment Technology Program Report No. 24, July 1997: U. S. Bureau of Reclamation Water Treatment Engineering & Research Group





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TREATMENT PROCESS*
*per http://www.hollywoodfl.org/pub-util/Water/memb-sft.htm
Pre-Treatment
Treating the Biscayne and Floridan waters using membrane technology is essentially the same despite the fact the waters differ substantially in quality The process steps include pre-treatment, a pressure increase for the membrane treatment units, removal of hydrogen sulfide (present in the raw water), and post-treatment. All of the processes utilize a state-of-the-art computer control system.

During pre-treatment the raw water is dosed with acid and anti-scalant and then filtered. The acid and anti-scalant reduce the pH of the water and prevent minerals from clogging the membranes. The minerals are captured by the membranes and are rejected to the waste stream. In addition to the chemical treatment, the raw water is also passed through large cartridge filters to remove any particulate matter larger than 5 microns prior to reaching the reverse osmosis units.

Degassification
The raw water from the Biscayne and Floridan aquifers contain gases, i.e.: hydrogen sulfide (H2S) and carbon dioxide (CO2) which pass through the membranes. H2S must be captured and treated since it can cause odors in and around the plant. After the water is treated using the membrane units it is sent to large tanks in which the water is sprayed through an air stream. This air stream removes about 99% of the H2S and CO2, The off gas from this process is further treated in an air scrubber to prevent any escape of the H2S to the atmosphere. This prevents any undesirable odors in the area.

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Membrane Treatment

The pretreated raw water is boosted in pressure to 150-psi for the Biscayne water and 250-psi for the Floridan water and is then passed through the membranes and sent to post-treatment. The water which does not pass through the membranes is called concent rate and is rejected to the waste stream. The concentrate is as the name implies, it is a concentrated solution of the minerals from the raw water. The concentrate is disposed through a pipeline to the Hollywood Regional Wastewater Treatment Plant. When u tilizing the Biscayne aquifer water, about 10% of the water treated is disposed as concentrate and with the Floridan aquifer water, about 20% of the water treated is disposed as concentrate.

Post Treatment

After degassification, the water is treated with caustic soda to increase the pH, then disinfected with chlorine and ammonia, and finally, fluoride is added to prevent tooth decay. During this post-treatment process the membrane treated water is also blen ded with water treated by the lime softening treatment system. This blending provides for a well balanced finished water product that is clean, safe, and sure.

Control System

Since the membrane process to treat water is complex, a state-of-the-art computer control system is utilized to monitor and control every stage of the treatment process. The new control room features two operator work stations and two main central compute rs. The two main central computers process all the information coming in and going out of the various treatment components. With this system the plant is totally automated and can be run with one operator.

In addition to the new plant controls, provisions for the old plant were also included in the new system to allow monitoring and operations of the old plant in conjunction with the new membrane plant. The capability is also available for the new control s ystem to allow monitoring of the plant operations from off-site points as well as being able to monitor and control other portions of the utility system, such as the wastewater treatment plant. To the City this capability could prove invaluable during a h urricane when access is limited to the wastewater treatment plant.




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Hollywood, Florida WTP Upgrade

Hollywood, Florida Water Treatment Plant Upgrade

A flexible, cost-effective solution built on innovative engineering and diverse technologies
With high-quality raw water at a premium in South Florida, the City of Hollywood was forced to tap into the Floridan Aquifer to supplement its Biscayne Aquifer supply. The Floridan water is dependable and abundant but of significantly lower quality than that from the Biscayne. To address this issue, Hollywood contracted M&E to conduct a treatability study and to provide design and construction services to upgrade the city's water treatment plant.

Rather than combining raw water supplies prior to treatment, M&E integrated three distinct treatment processes into a cohesive system. The existing lime-softening system was rehabilitated, maximizing use of existing equipment. M&E engineers designed a nanofiltration process to treat water from the Biscayne Aquifer, ensuring SDWA quality at the lowest possible cost. Then, to treat the Floridan Aquifer's brackish water, M&E designed a reverse osmosis system. The upgraded plant blends 18-mgd of lime-softened water, 14-mgd of membrane-softened water and 4-mgd of reverse osmosis water before transfer to a distribution storage system.

Other project features included construction of four new Floridan Aquifer wells; construction of mains to serve the membrane treatment facility; and consolidation of all system controls in the membrane treatment building. M&E's innovative solution provides optimum flexibility, maximum cost-efficiency and full regulatory compliance as well as providing great tasting water to Hollywood's customers.


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