fropg-1
FROID WATER TREATMENT PLANT
Froid Water Treatment Plant
106 3rd Ave. N
Froid MT 59226
TEL: 406-766-2202
Mike Madsen, Plant Manager
PO Box 215
Froid MT 59226
EQUIPMENT SUPPLIER
Aqua-Envirotech Mfg. Inc.
W. Highway 2 & 85
Williston ND 58801
TEL: 701-572-8527
MEMBRANE SUPPLIER
Osmonics
5951 Clearwater Drive
Minnetonka MN 55343-8995
TEL: 612-933-2277
FAX: 612-933-0141
Web Page:
http://www.osmonics.com
Contact Person:
Matt Hofacre
Tel: 612-988-6646
fropg-2
CONSULTING ENGINEER
Kadrmas, Lee & Jackson
Rural Rte. 2 Box 136a
Williston ND 58801
Contact Person:
Don Loomer
TEL: 701-572-6352
SUMMARY
DATA | Startup Year | 1995 |
| Process | RO |
| Capacity (MGD) | 0.1 |
| Recovery Rate (%) | 70 |
| Pretreatment | ozonation, pressure filtration to remove
iron and manganese |
| Post-Treatment | blending,
disinfection |
| Feed Water Composition | TDS=2200mg/L
|
| Product Water Composition | TDS: 472 |
| Concentrate Disposal | treated by municipal wastewater
lagoon
with three lined treatment cells |
fropg-3
Osmo® 54A/74B Engineered Membrane Systems
Product Information
Osmonics® engineered membrane systems are machines with capacity that ranges from 22,000 gpd (3.5 m³/d) to 720,000 gpd (114 m³/d) per skid. These systems are uniquely manufactured to meet specific water purification and design requirements.
Our engineered machines combine the built-in quality of custom engineering and craftsmanship, with the economy of standard components and modules. Osmonics manufactures all the major components of the system and offers you single-source responsibility.
Osmo 54A/74B machines have a solid track record of operation in a variety of markets such as:
Beverage
Pharmaceutical
Power Generation
Municipal
Semiconductor
We can engineer each system to meet your specific design requirements for material, instrumentation, and control and provide high quality water for your application.
fropg-4
STANDARD FEATURES
- Four-port side-entry Osmonics stainless steel (304 or 316) housings simplify
membrane element change-outs and eliminate the need for high-pressure
manifolding
- Patented turbulent flow Osmo membrane elements provide low-pressure drop and
high flow rates
- Quiet, dependable Tonkaflo® multi-stage centrifugal pumps ensure high-efficiency
performance
- 5-µm pure polypropylene Hytrex® prefilters with dirt-holding capacity extend
membrane life and reduce maintenance
- Accessible inlet/outlet connections for quick and easy chemical cleaning
-
Comprehensive electrical control package with isolatable alarms provides
fail-safe operation
-
Heavy-duty painted steel frame provides quick installation and resists corrosion
-
Sampling valves at all critical points of the machine allow quick testing and
monitoring operating conditions
-
Multiple control valves enable adjustment of flow rates to changing conditions
-
Complete sets of drawings and O&M manuals support equipment validation,
operation and maintenance
SPECIFICATIONS
-
Skid and Frame: Welded heavy-duty I-beam or channel structural steel (304 stainless
steel is also available).
-
Paint: Epoxy primer with corrosion-resistant phenolic overcoat (for structural steel).
-
Low-Pressure Piping: Schedule 80 PVC (304 or 316 stainless steel is also available).
-
High-Pressure Piping: 304 stainless steel (316 stainless steel is also available).
-
Cartridge Filter Housing: Osmonics stainless steel.
-
Cartridge Filter: Hytrex 5-µm pure polypropylene depth filter.
-
Membrane Elements: Osmo 4-inch or 8-inch diameter with CA or PA membrane.
-
Pump: Tonkaflo multi-stage centrifugal, 316 stainless steel with Noryl* internals
(stainless steel internals are available also).
-
Motor: Totally enclosed fan cooled (TEFC) (open drip proof [ODP] is also available).
-
Enclosure: IEC or NEMA-12 electrical components (other NEMA ratings are
available).
-
Power Requirements: Three-phase, 460 VAC, 60Hz. Control circuit: single-phase, 110
VAC, 60 Hz.
fropg-5
- ALARMS:
- Low-pressure inlet
- High temperature
- High/Low pH
- High permeate back pressure
- INSTRUMENTS:
- Pre-filter pressure gauge
- Post-filter pressure gauge
- Primary pressure gauge (high-pressure pump)
- Final pressure gauge (concentrate)
- Permeate pressure gauge
- Permeate conductivity monitor (or resistivity)
- pH monitor
- Thermometer
- Permeate flow meter
- Concentrate flow meter
- Feed flow meter (optional)
- MAN-MACHINE
INTERFACE (optional):
- PanelView
- RS View
- Wonderware
- * Noryl is a trademark of General Electric Company.
ASSOCIATED PAGES
APPLICATIONS
USP Purified
Water
USP Purified
Steam
USP Water For
Injection
TECHNICAL PAPERS
Reverse
Osmosis
Two-pass Combined
Membrane Reverse Osmosis Water Treatment
Methods of Water
Purification
Using
Nanofiltration in Beverage Production
Nanofiltration for
Beverage Production
Wastewater Recovery
Using Reverse Osmosis
A Case for
Point-of-Use RO Ultrapure Water Systems
Reverse Osmosis
Battles Salt Water Intrusion
TOC Removal from
Make-up Water at Millstone Nuclear Generating Station
Two-pass Reverse
Osmosis Systems as Applied to Water Purification
Crossflow Membrane
Filtration
High-Purity Water Systems
Home | News | Products
| Applications
| Library
| Financial
| Search
| Talk to
Us
Please notify our webmaster of any problems you may have with
the site.
fropg-6
From:
U. S. Department of Agriculture, Rural Development Programs
http://www.usda.gov/rus/water/ees/englib/pdf/mtwtr1.pdf
Water and Environmental Programs
Engineering Success Stories
State: Montana
Borrower Name and Case No.: Town Of Froid
Engineering Firm: Kadrmas, Lee & Jackson
Rural Development Contact: Karen Bucklin Sanchez, State Engineer 406/585-2520
Congressional Information: Senators Max Baccus and Conrad Burns
Representative Rick Hill
County: Roosevelt
Keywords: Disinfection, Reverse Osmosis
Reverse Osmosis Water Treatment Plant and Water System
Improvements
Description of Problem / Issue:
The Town of Froid has a population of approximately 230 and provides water to about
138 users (147 EDU's). (Not including bulk water sales.) The Town's water source is
groundwater. The raw water quality is poor, exhibiting elevated levels of iron,
manganese and total hardness.
| Raw Water Analysis |
| April 15, 1996 (Abridged) |
| |
|
| Sodium Absorption Ratio = 5.92 |
Hardness = 39.1 Grains/gal |
| TDS (Calculated) = 2072mg/L |
Hardness = 670mg/L |
| Total Manganese = 0.28 mg/L |
Sodium Chloride (Calculated) = 15mg/L |
| pH = 8.07 |
Total Iron = 7.70 mg/L |
| |
|
| CATION | mg/L |
ANION | mg/L |
| | | | |
| Calcium | 175.0 | Chloride | 9 |
| Magnesium | 51.0 | Carbonate |
0 |
| Sodium | 352.0 | Bicarbonate |
842 |
| Iron | 1.6 | Sulfate |
630 |
| Nitrate | 0.1 | Potasium |
11 |
fropg-7
MT: Froid Water Treatment Plant (2/9/99)
Treatment of the Town's water is necessary. In addition, other improvements to the
water supply and distribution system were necessary.
A backup water supply well was needed since one of the two existing water supply
wells was exhibiting elevated nitrate levels. The water distribution system was
constructed in the 1950's and consisted of one 50,000 gallon storage tank, 4 and 6
inch AC pipe, and only one operational gate valve, no water meters and minimally
operational fire hydrants.
Design parameters for the water treatment plant included:
Remove iron, manganese and hardness
Minimize project capital costs
Minimize operation & maintenance costs
Construct a treatment plant which could be easily modified to meet future
regulations.
Solution:
Froid's consulting engineer assisted the community to prepare a Preliminary
Engineering Report and applications for funding. In 1994, funds were provided by
Rural Development (Farmer's Home Administration), Montana Treasure State
Endowment program and the Town of Froid.
The project was divided into two phases. The first was development of an additional
water supply well. Once the new well was developed, a pilot plant study was
conducted on the water source.
Based on the engineer's preliminary report and the pilot plant study, it was determined
that the most effective treatment for this water source was a combination of iron and
manganese removal using ozone for oxidation followed by reverse osmosis (RO)
membrane treatment. Ozone was the oxidant chosen due to the organics present in
the raw water as well as the chemical cost.
Froid's 100 gpm ( 0.144MGD) RO water treatment plant was constructed in 1995.
Following is a brief summary of the water treatment plant process:
- Raw water is pumped from the wells to the water treatment plant
- Ozone is injected into the raw water utilizing a deep tube injection system
- Water passes through a pressure filter to remove iron and manganese
fropg-8
- After the iron and manganese filter, the water flow is split. A portion is directed to
the membrane treatment system (reverse osmosis membranes) and the remainder
is directed to the blending tank
- Water pressure is increased before entering the membrane filters. The RO
membranes process the water and a portion is rejected as concentrate ("brine").
The treated water (permeate) is directed to the blending tank
- From time to time the RO membranes are cleaned with a solution of citric acid,
sulfuric acid or sodium hydroxide. Sodium bisulfide is periodically injected into the
membranes to inhibit biological growth. Membranes must be replaced periodically,
every 5 to 7 years. The cleaning solution, iron manganese filter backwash water
and the brine produced from the RO process are all flushed to the sanitary sewer
system, and treated by the municipal wastewater facultative lagoon
- The final water blend of RO permeate to Fe/Mn-treated water can be adjusted. The
Town has been operating generally at a 50/50 blend. Winter production has been
at 80 gpm, and summer at 100 gpm, due to water demand and water temperature
- At the blending tank, sodium hypochlorite is injected for disinfection and
orthophosphates are injected for corrosion control before being pumped to the water
distribution system
The plant is unique in that it is essentially "chemical free". Operation & maintenance
costs for the system are approximately $1.04 to $1.40 per 1000 gallons of finished
water.
Since nearby rural non-residents' well water quality is also poor quality, bulk water
sales to area residents is brisk. Non-residential water use includes using the water as
"spray mix" for agricultural fertilizer and pesticide application purposes. The treatment
facility has been operating at capacity since it was put on line.
In addition to constructing the water treatment plant, the distribution system was
upgraded by replacing all gate valves and adding some additional valves, replacing
leaking fire hydrants, looping dead ends and installing water meters.
Also, with the increase in sewage flow due to backwash water from the water treatment
plant, a portion of the sanitary sewer system was also upgraded. The existing one-cell
facultative lagoon was leaking. One lift station was rehabilitated and a second new lift
station was constructed. A new wastewater lagoon with three lined treatment cells was
constructed.
fropg-9
FROID WATER TREATMENT PLANT AND
WATER DISTRIBUTION SYSTEM IMPROVEMENTS
FACT SHEET
BY
DONALD W. LOOMER, P.E., L.S.
KADRMAS, LEE & JACKSON
WATER SYSTEM DISTRIBUTION IMPROVEMENTS
- Developed an additional water well
- Modified existing water well No. 1 by installing a pitless adaptor
- Plugged two existing abandoned water wells
- Installed additional 6" water main 3,081.5 L.F.
- Replaced all existing Gate Valves/Boxes within the distribution system 16 total.
- Installed additional Gate Valves/Boxes 16 total
- Installed 6 Fire Hydrants
- Installed a total of 135 water meters, 16 meter pits
- Rehabilitation of existing Sanitary Sewer Lift Station
- Constructed a new Sanitary Sewer Lift Station
- Installed 2073 L.F. of 4 inch sanitary sewer forcemain
- Constructed 3 cell lagoon to replace the existing 2 cell lagoon system
- Construction Costs $510,305.38
WATER TREATMENT PLANT
Average water usage 47,600 gallons per day
RAW WATER ANALYSIS
Date of Analysis: 4-15-96
Conductivity @ 77°F = 2300.5 pMHOS/cm
pH = 8.07
Residual Sodium Carbonate = 0.40 MEQ/L
Hardness = 39.1 Grains/gal
Sodium Adsorption Ratio = 5.92
Hardness = 670 mg/L
Total Dissolved Solids (Calculated) = 2072 mg/L
Sodium Chloride (Calculated) = 15 mg/L
| CATION
| mg/L
| ANION
| mg/L
|
| | | | |
| Calcium
| 175.0
| Chloride
| 9.0
|
| Magnesium
| 51.0
| Carbonate
| 0.0
|
| Sodium
| 352.0
| Bicarbonate
| 842.0
|
| Iron
| 1.6
| Sulfate
| 630.0 |
| Potassium
| 11.0
| Nitrate-N
| 0.1 |
fropg-10
TOTAL IRON = 7.70 mg/L
Total Manganese = 0.28 mg/L
- Constructed 50' x 36' block/brick building
- Water treatment plant process
- Raw water enters the plant from wells
- Ozone is then injected into the raw water
"ozone, allotropic form of oxygen having three atoms in each molecule, formula O3. Ozone is formed when an electric spark is passed through oxygen, and causes a detectable odor near electrical machinery. The commercial method of preparation consists of passing cold, dry oxygen through a silent electrical discharge. Ozone is much more active chemically than ordinary oxygen and is a better oxidizing agent."
- After the ozone is injected into the reaction tank the water passes through an iron and manganese removal filter.
Periodically the filter is backwashed.
- After the Iron and manganese filter, the water flow is split with a portion of the water being directed to the membrane treatment system (R.O. Membranes), and the remaining portion being directed to the blending tank.
- At the membrane treatment system, water pressure is increased before entering the membranes. At this point the R.O. membranes process the water with a portion of the water being rejected as concentrate and the remaining treated water (Permeate) being directed to the blending tank.
- From time to time the R.O. membranes need to be cleaned. This is done with a solution of sulfuric acid. The clean solution is flushed down the drain to the sanitary sewer system. Periodically Sodium Bisulfide is also injected into the membranes to inhibit biological growth.
- The water treatment plant is set up to allow the operation to change the blending rates of iron and manganese treated water and the Permeate water. Currently 58% Permeate, 42% Blend.
- Sodium Hypochlorite is injected into the water at the blending tank for disinfection before being pumped to the elevated tower.
- Construction Costs - $618,783.00
TDS of Treated Water = 496
Iron = .03mg/L
Manganese = .2 mg/L
For additional information contact:
Donald W. Loomer, P.E., L.S.
Bryan Beggs, P.E., L.S.
222 Airport Road
Williston, ND 58801
Telephone: 701-572-6352
Fax: 701-572-2019