Pressure Filters

WesTech granular activated carbon (GAC) contactors are an effective means for removal of low-molecular-weight contaminants from aqueous solutions. They are especially suited for the removal of dissolved organic compounds responsible for poor taste and odor in drinking water, as well as removal of chlorine from industrial waters. When used as pretreatment equipment, these contactors will prolong the life and efficiency of demineralizing ion exchange resins and reverse osmosis membranes.

WesTech GAC pressure contactors utilize a pressure vessel, typically with a conical underdrain for convenient GAC media replacement. These contactors are sized according to the contact time required for contaminant removal and desired media replacement frequency. Contactor piping and valving for multiple units can be arranged to easily change flow paths between parallel flow, series (lead/lag or daisy chain) flow, or single-unit flow patterns. Contactors are typically backwashed only once upon new media installation, and the media usage front is then monitored via sample taps to allow for anticipation of media replacement. The contactors are equipped with convenient media and fill piping and fittings for media replacement.

WesTech AERALATER®; Iron and Manganese Removal Systems offer a proven, efficient approach to iron (Fe) and manganese (Mn) removal from water. The AERALATER combines three processes - aeration, oxidation detention, and granular media filtration in a single unit. The use of this system reduces the chemical feed demand for iron and manganese oxidation. Additionally, this unit is designed to eliminate the need for backwash storage tanks and backwash pumps through a self-generated backwash process. After iron, manganese, and other suspended solids removal is accomplished in the AERALATER, water is prepared for granular activated carbon (GAC) treatment, ion-exchange softening, reverse osmosis, or to be sent directly to the water distribution system.