Nitrate Removal using ACWA’s Nitreat® Technology
With the rise in Nitrates in the raw water Anglian Water (AW) needed to install a reliable nitrate removal system at various sites to secure future compliance having an undertaking with the Drinking Water Inspectorate (DWI) to provide a solution to the water quality problem. The sites included; Lynge Forge, Ringstead, Isleham, Eriswell, Caister and Fring.
It was determined that the best solution would be to install a nitrate removal stage based on Ion Exchange at the identified sites above to reduce the nitrate levels.
Innovative solution: Use of Nitreat® ion exchange technology for nitrate removal from drinking water.
The Solution
ACWA’s successful solution was to design and install Nitreat® Skid mounted systems capable of reducing the Nitrate levels within a proportion of the raw water feed down to less than 5mg/l before blending back with the remaining flow to produce a blended treated water quality with a discharging Nitrate level of <43mg/l.
ACWA solution included Salt saturators (brine) and water softener systems along with feed pumps, inline strainers and monitoring stations controlled from a MCC Panel.
ACWA’s unique design operates continuously treating the raw water through a large proportion of resin vessels whilst regenerating the resin in the remaining vessels simultaneously, this negates the need for a system shutdown for resin regeneration purposes.
ACWA’s unique design operates continuously treating the raw water through a large proportion of resin vessels whilst regenerating the resin in the remaining vessels simultaneously; this negates the need for a system shutdown for resin regeneration purposes.
Technical Overview
Design basis:
• 19 Turnkey M&E Projects
• Plant Flow – 2.95 – 14.0 MLD
• Raw Nitrate from 58 to 118mg/l
• Blended Nitrate Target – <43mg/l
The Benefits
ACWA’s elegant solution is:
• Designed to minimise the treatment building footprint
• Built with Redundancy for Future treatment flow requirements
• Simple to operate and maintain
• Designed to produces very little waste liquors
• Designed to optimise Power and Salt consumptions