CLIENT: 
Leitrim County Council
  • Design / Build / Operate Contract
  • 20 yr O&M Contract
  • P.E. - 10 No. WWTP’s ranging from 100PE to 2,600PE
  • Package Type Treatment System incorporating Aerator Wheel (STM), Clarifier etc.
  • 15 No. Outlying PS’s
  • On-site Sludge Thickening
  • Capital Works €10.4M
CHALLENGE: 

Leitrim County Council awarded the Design Build Operate contract for new wastewater treatment works at Dromahaire, Drunkeeran, Kinlough, Kiltyclogher, Roosky, Cloone, Jamestown, Ballinglera, Killarga & Drumcong, to Response Engineering.

The project was procured by public tender as a DBO contract with a long term operating contract of 20 years duration. The design population equivalent for the plants ranges from 100 PE to 2,600 PE. The contract included for the installation of 15 new pumping stations and rising mains. Interim management of existing WWTP’s until the new WWTP’s are operational is included in the contract.

ANSWER: 

Response Engineering designed, procured and installed all process plant for the works which includes inlet works consisting of automatic screens, screenings washing and compaction and grit removal system. Secondary treatment is effected by extended aeration in STM aeration tanks. Final settling tanks with half-bridge scrapers are provided. Phosphorous reduction is achieved by ferric dosing and simultaneous precipitation.

PROCESS SUMMARY: 
  • Inlet screening and screenings disposal
  • Grit removal
  • Stormwater storage
  • STM aeration system
  • Secondary settlement
  • P-reduction
  • Sludge thickening
  • SCADA systems
STANDARDS: 

Different discharge standards apply to the various works and are related to the assimilative capacity of the receiving waters.

PARTNERSHIP: 

Response Engineering will operate and maintain the WWTW’s under a 20 year O&M contract in compliance with the performance management system set out in the contract.

© Response Group 2013

Main Office: Response Group, Railway Road, Charleville, County Cork, Ireland