After researching 29 companies, Black Canyon City settled on AdEdge Technologies for an arsenic-removal treatment system. Learn more about the approval and installation process.
In August 2004, AdEdge was awarded a contract by the Black Canyon City (Arizona) Water Improvement District to provide a turnkey project for permitting, supplying equipment, installation, startup and commissioning three arsenic treatment systems to bring the district into compliance with new MCL for arsenic.
The water district, which serves about 2,500 people, uses three main water supply sources that deliver 200 to 300 gpm each. Treatment systems were provided at each wellhead to reduce naturally occurring arsenic ranging from 13 to 23 ppb. The district’s water board researched more than 29 companies involved with arsenic treatment technology and chose AdEdge Technologies to complete the project based on lowest capital and operating costs, simplicity of operation and experience in Arizona with several other successful installations.
As part of the proposal process, AdEdge obtained certain site-specific design and water quality data to form the basis of design. The design report and permit application were submitted to the Arizona Department of Environmental Quality with construction permit approvals granted in less than four weeks. The rapid turnaround by the ADEQ was attributed to the technology receiving prior approvals in the state with a similar installation in Rimrock under EPA’s Arsenic Demonstration Program.
Fabrication of the modular APU-300 systems began with site preparation tasks that included underground piping tie-ins, concrete pads and shade structures. Equipment was then delivered and installed. These systems were the largest to-date of AdEdge’s multiple installations in Arizona for public drinking water systems using granular ferric oxide technology.
Three separate APU-300 (up to 300 gpm) treatment systems were installed and deployed. Each of the systems uses GFO (granular ferric oxide) adsorption media. The small footprint system features a twin vessel parallel flow configuration with automatic controls, PLC and a 100 percent backwash recycle system with zero discharge or loss of water. No pretreatment is necessary. Chlorine (sodium hypochlorite) is currently injected before the adsorption system for disinfection purposes. The AdEdge adsorption system requires no chemicals, regeneration and does not generate liquid or hazardous waste. Media, when exhausted, will be discarded as a nonhazardous solid waste in a solid waste landfill. Minimal operation, maintenance or operator attention is required for this simple automated system. Instrumentation is provided on a control panel to measure critical operating parameters. Total gallon throughput and flow rate for each vessel is measured continuously with a dedicated flow-totalizing meter.
Installation and startup was completed in May/June 2005 with ADEQ permit documents submitted. The permit was approved by ADEQ and all three systems were placed into full service in October 2005. As of December 2007, treated effluent of the systems still indicated arsenic was being removed to below 10 ppb, exceeding predicted performance.
About AdEdge Water Technologies
Founded in 2002 and headquartered just north of Atlanta, Georgia, AdEdge Water Technologies specializes in the design, development, fabrication and supply of packaged treatment solutions, specialty medias, innovative technologies and membranes that remove contaminants from process or aqueous streams. AdEdge has extensive experience in the removal of arsenic, iron, manganese, hydrogen, sulfide, fluoride, nitrate and uranium from water. For more information, call 866/823-3343 or visit www.adedgetech.com.