The water supply for this city in the mid-west was sourced from wells with very high levels of hardness, sulfate and moderate levels of nitrate. Wigen supplied RO systems at two of the City’s WTPs to follow the existing greensand gravity filters for Fe and Mn removal, to improve the quality of water distributed to the City’s customers. Each RO system includes concentrate recovery RO units that allow recoveries of 80 – 90%.

TREATMENT SYSTEM INFORMATION:
Site 1:
-Maximum Permeate Flow: 1,580 gpm 
-Array: Skids 1 & 2: 20:10, 6M, Skid 3: 12:6M 

Site 2:
-Maximum Permeate Flow: 1,060 gpm 
-Array: Skids 1 & 2: 12:6, 6M, Skid 3: 8:6M

While looking into treatment options for meeting the new arsenic standard, this small community began also looking into technologies that could soften the well water as well as reduce sulfate and ammonia levels. When reverse osmosis was chosen as the best option to meet all treatment goals, Wigen was selected to provide the RO system.

TREATMENT SYSTEM INFORMATION:
Maximum Permeate Flow: 540 gpm
Array: 8:6:4, 6M

This City had an ageing package clarification/filtration system that had difficulty meeting the State filtered water turbidity limit of 0.3 NTU. The City decided to replace the existing plant with a 2 MGD universal ultrafiltration system provided by Wigen. The plant is located in a park in the Salt Lake City area and water is fed from a creek around 160ft above the plant and this head is used to drive the water through the auto-strainers and membrane modules.

TREATMENT SYSTEM INFORMATION:
Capacity: 3 x 1 MGD Trains (N+1)
Design Flux: 44.7 gfd

To help support burgeoning growth due to oil production in this region of North Dakota, ultrafiltration and reverse osmosis were chosen for a new water treatment plant to treat water sourced from the Missouri River. Treatment challenges included highly fluctuating turbidities and seasonal temperatures as well as hardness of around 250 mg/L as CaCO3 and TDS up to 500 mg/L. RO treats 50% of the UF filtrate to reduce the treated water hardness and TDS levels. A UF backwash recovery system allows an overall UF system recovery of over 99.5%.

TREATMENT SYSTEM INFORMATION:
UF System:
-5 primary trains each with a capacity of 1.5 MGD
-2 secondary trains each with a  capacity of 150 gpm
RO System:
-3 trains each with a capacity of  729 gpm
-Array: 17:9, 7M
-Design Recovery: 80%

This small community in North Dakota was challenged with rapid growth and increasing demand, while the existing conventional package filtration systems at its two water treatment plants were frequently exceeding the turbidity standards. Both systems were replaced by ultrafiltration systems provided by Wigen. Pretreatment with coagulation and plate settlers was provided for each facility to treat the feed water with flashy turbidities. Installed in 2011, these were the first large scale potable UF systems in the United States to use Toray modules. These systems were designed very conservatively to minimize maintenance and cleaning frequencies for this remote community.

TREATMENT SYSTEM INFORMATION:
Site 1: Capacity: 2 x 1 MGD Trains
Site 2: Capacity: 2 x 0.5 MGD Trains
Design Flux: 20 gfd

A County was forced to take a well out of service after arsenic levels exceeded the EPA’s 10 ppb limit, leading to water restrictions for the affected community. To restore this vital water source, the County implemented a treatment process using oxidation and coagulation followed by Greensand Plus pressure filtration to reduce arsenic levels. Wigen provided the chemical dosing and filtration equipment, along with a backwash recovery system, as the site lacked access to sewer for backwash disposal.

TREATMENT SYSTEM INFORMATION:
Design flow: 500 gpm
Filter sizing: 3 x 84” diameter vessels
Backwash recovery tank: 25,000 gallons

To help reduce overdraft of the local aquifer and prevent deteriorating quality of the ground water supply due to seawater intrusion, Monterey One Water installed the first potable water reuse facility in Northen California. Wigen supplied the universal UF and RO systems for this Advanced Water Purification Facility. After advanced oxidation the treated water is injected into the aquifer.

TREATMENT SYSTEM INFORMATION:
UF System:
-Capacity: 5 x 2 MGD UF trains
-Design Recovery: 93%
RO System:
-Capacity: 2 x 2 MGD trains and 1 x 1.5 MGD train
-Array: 40:20, 7M and 30:15, 7M
-Design Recovery: 81%

After the City changed its water source, higher conductivity levels led to more frequent regeneration of this energy company’s existing mixed-bed demineralization system. To address this, UF and RO trailers were initially deployed as a temporary solution. As part of the permanent upgrade, Wigen supplied UF and RO skids with a capacity of 8 MGD, to be installed in the facility’s basement. This required an innovative, space-efficient design to minimize the plant’s footprint while ensuring the equipment fit within the basement constraints.

TREATMENT SYSTEM INFORMATION:
UF System:
-Capacity: 4 x 2.93 MGD UF  trains (N+1)
-Design Flux: 64.4 gfd
-Design Recovery: >95%
RO System:
-Capacity: 4 x 2 MGD trains
-Array: 24:12:6, 7M
-Design Recovery: 90%

WIGEN SCOPE OF SUPPLY:
-375 gpm second pass RO Skid (existing first pass)
-400 gpm Mixed Bed Demineralizer System including Regeneration Equipment

WIGEN SCOPE OF SUPPLY:
-220 gpm UF System
-132 gpm 2-Pass RO System
-125 gpm EDI System feeding existing Mixed Bed DI System

WIGEN SCOPE OF SUPPLY:
-Pretreatment skid with Bag and Cartridge filters
-400 gpm single pass RO System
-Membrane Degasification and EDI Systems on common skid.

A tailings pond at this mine site was nearing capacity and it was necessary to develop a solution to treat this water for the removal of calcium sulfate and metals to allow river discharge and prevent overflowing. The treatment process implemented consisted of chemical precipitation and filtration pretreatment followed by reverse osmosis supplied by Wigen.

RO TREATMENT SYSTEM INFORMATION:
Design flow: 9 MGD – 5 x 1.5 MGD and 2 x 0.75  MGD trains
Arrays: 28:14, 7M and 14:7, 7M

A 23 MGD UF system was provided by Wigen for treatment of cooling water make-up at an integrated chemical manufacturing complex in Freeport Texas. Water is sourced from the Brazos River where turbidity ranges from 10 to 100 NTU. Treatment consists of coagulation and plate settlers followed by ultrafiltration.

UF TREATMENT SYSTEM INFORMATION:
Capacity: 12 x 2.3 MGD Trains (N+2)
Design Flux: 37 gfd
UF System Recovery: 96%

This temporary facility was located on a superfund site to clean-up contaminated soil and prevent PCB from leaching into a nearby lake. Wigen’s scope of supply was pressure filters as pretreatment to GAC adsorbers.

TREATMENT SYSTEM INFORMATION:
Design flow: 2,500 gpm
Filter sizing: 12 x 120” diameter vessels
Media: Silica sand and Anthracite

For nearly a century, untreated discharge from a railway tunnel—contaminated with uranium and high levels of total suspended solids (TSS)—had been flowing into a local river. In response to an EPA mandate requiring the tunnel owner to treat the discharge, an ultrafiltration (UF) system with coagulation pretreatment was implemented. With no liquid waste disposal options, the UF backwash water is treated using dissolved air flotation (DAF), where the underflow is recycled back to the UF feed tank, and the sludge is dewatered via centrifuge before being transported for off-site solids disposal.

UF TREATMENT SYSTEM INFORMATION:
Capacity: 2 x 240 gpm Trains (N+1)
Design Flux: 28 gfd
UF System Recovery: 93%