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%