Case Studies
TDS and Heavy Metal Removal of MineDrainage prior to River Discharge
A tailings pond at this mine site was nearing capacity. Because of this, 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. Thus, 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
UF Treatment of Cooling Water Make-upat Integrated Chemical Manufacturing Complex
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. In this case, water is sourced from the Brazos River where turbidity ranges from 10 to 100 NTU. In order to address this, 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%
Soil Remediation at Superfund Site for PCB Removal
This temporary facility was located on a superfund site to clean-up contaminated soil. Additionally, this prevents PCB from leaching into a nearby lake. In this case, 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
UF Part of ZLD System for TSS and Uranium Removal Prior to River Discharge
For nearly a century, untreated discharge from a railway tunnel flowed into a local river. Specifically, uranium and high levels of total suspended solids (TSS) contaminated the water. Later, 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, dissolved air flotation (DAF) treats the UF backwash water. Next, the underflow is recycled back to the UF feed tank. Then, a centrifuge dewaters the sludge 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%
