In November 200, AdEdge Water Technologies was selected among other vendors by the Resort Village of Kannata Valley (RVKV) to supply an arsenic, iron, manganese and turbidity treatment system for their community in Silton, Saskatchewan, Canada. Prior to selection, AdEdge worked with its local representative, the Water Clinic, on piloting the system that was chosen.
The water system currently uses one artesian well that serves potable water to 260 connections at a flow rate of 132 gallons per minute (gpm). Several options were considered based on the need to remove the 1.7 mg/L to 2.14 mg/L iron and arsenic from 31 parts per billion (ppb) to below the new maximum contaminant level (MCL) of 10 ppb.
An AdEdge AD26 oxidation/filtration system was selected as the best overall approach to simultaneously remove both contaminants while having a small footprint. Work was closely coordinated with the RVKV and its consultant to design and permit the treatment system. Following the award, all appropriate permitting documents were prepared and submitted to the province for approval, with the permit granted in January 2010. The AdEdge scope of work included system design, supply and startup assistance. The packaged AD26 system utilizes an NSF 61-certified manganese dioxide media (AD26) that is excellent for co-contaminant removal. The technology was selected based on overall cost, the small footprint and simplicity of operation.
The AdEdge AD26 arsenic treatment train consists of one skid-mounted triplex packaged treatment systems with three vessels in parallel to treat up to 150 gallons per minute (gpm). A design filtration rate of 3.98 gpm/sq was chosen to allow for filtration of the high level of contaminants, including turbidity in a range of 6.34-12.0 NTU. The AD26 automated system is equipped with a PLC, automated butterfly valves and a control panel integrated with chlorine addition and monitoring for process control and disinfection purposes.
The system also includes air wash and complete backwash recycle, providing a treatment system with zero discharge. The system is pre-engineered, pre-piped and skid-mounted for ease of installation and operation. A continuous free chlorine monitor on the system allows the operator to maintain desired disinfection residual in the distribution system. The AD26 technology has been deployed successfully by AdEdge on many high arsenic, iron and manganese wells to date, and also on five full-scale U.S. EPA arsenic demonstration projects.
Installation was completed and the system officially started up in August 2010. Since operations began, the system has consistently met all EPA MCLs for arsenic, iron and manganese. Arsenic in the treated water has been recorded consistently below detection levels.
Case Study Fast Facts
Client: Resort Village of Kannata Valley
Location: Silton, Saskatchewan, Canada
Date: August 2010
Contaminants treated: Arsenic, iron, manganese
Flow rate: 150 gpm