North Roscommon WTP

CIMG1050_12190847

North Roscommon WTP, Lime dosing upgrade contract

  • Design and build of a pH correction system for final treated water to adjust pH from approximately 6.3 to 7.0 using hydrated lime.
  • Removal of the existing lime dosing and make-up system and installation of a new 20 litre SS lime powder metering unit, 1,400 litre mixing tank, 0.92 kW peristaltic dosing pump and pH meter.
  • Installation and programming of a PLC based IP55 control panel with dose pacing via a peristaltic dosing pump VSD linked to a 4 – 20 mA signal from the pH meter to achieve a constant pH of 7.0.
  • Upgrade of existing lime silo including installation of new air receiving vessel, air dryer, replacement of air pads and two-way pressure relief valve on top of silo.
  • Installation of ancillary works including handrailing and access ladder, eyewash station and infrared frost protection heating system complete with thermostat.

Client

Roscommon County Council

Client?Representatives

Roscommon County Council

Date

January 2014 – May 2015

Contract Value

? 53 000

Location

Roscommon County

Date

January 28, 2021

CIMG1040
CIMG1050_12190847
Lime_Dosing