Advanced Metals Removal System with FerroLock™ Zero Valent Iron

Envirogen’s advanced metals removal system (AMRS) is an active water treatment system that allows use of multiple zero valent iron (ZVI) media formulations to accomplish the removal of heavy metals from wastewater – including selenium, chromium, and arsenic.

Our proprietary AMRS design achieves up to 50% lower capital cost compared to conventional ZVI system designs and provides the fluidization flow flexibility needed to utilise multiple types and grades of ZVI media formulations. Our design is unlike the in-situ approach more commonly employed with conventional ZVI for metals removal from water, and offers several advantages including:

Reduced physical footprint

Ability to effectively operate over a range of conditions and contaminant concentrations

Automatic pH adjustment to optimise removal efficiency

Pilot validation available and recommended

Achieve permit compliance consistently

Treated water can be safely discharged with no toxicity impact

Advanced Metals Removal System (AMRS)

Selenium, Chromium and Arsenic Removal: Advanced Metals Removal System (AMRS) using FerroLock Zero Valent Iron (ZVI).

High efficiency: FerroLock™ zero valent iron media for removal of selenium, chromium and arsenic

Envirogen’s advanced metals removal system utilizes FerroLock™ ZVI technology to deliver highly efficient removal of selenium, chromium and arsenic from water allowing customers to comply with stringent wastewater discharge permit limits.

Envirogen’s approach is to examine the characteristics of your wastewater and select the best FerroLock™ ZVI media to use from an overall performance, longevity, and life cycle cost standpoint. We will consider concentrations of certain salts that can quickly dissolve the iron from some ZVIs. In addition, sulfate affects some ZVI formulations more than others.

Employed primarily for groundwater and wastewater remediation, our FerroLock™ ZVI media reacts with contaminants, effectively neutralising and adsorbing them, without generating toxic by-products.

The ability of Envirogen’s AMRS to utilise different zero valent iron media that range in size, reactivity and cost is a unique benefit for you to consider.

FerroLock™ media key characteristics:

High surface area

Mechanisms employed are adsorption and chemical reduction

Insoluble metals and iron-metal complexes remain on the media

Insoluble metals are not released

More effective on some metals than other chemical reduction processes with no chemicals to handle

Straightforward service and maintenance of AMRS system

AMRS pilot plant trials and lab scale testing

We do not believe there to be a “one size fits all” approach to ZVI treatment for the removal of heavy metals from wastewater and we’d always recommend pilot and/or lab scale testing to determine:

Performance vs. contact time (full-scale system size)

Media regeneration frequency

Iron solubilisation rate and post-treatment requirements

An Envirogen field-based pilot and full scale AMRS system utilizing FerroLock ZVI media.