FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
title
PLANT NO. 2 ALFA LAVAL INC. MAINTENANCE SERVICE AGREEMENT FOR CENTRIFUGES
end
GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a sole source purchase order to Alfa Laval Inc., for major service overhauls of six centrifuges at Plant No. 2 over a two-year period, for a total amount not to exceed $268,718; and
B. Approve an allowance of $120,000.
body
BACKGROUND
The Orange County Sanitation District’s (OC San’s) Plant No. 2 Five Alfa Laval Model ALDEC G3-125 dewatering centrifuge trains were installed and commissioned under project P2-92 to improve sludge dewatering and odor control. A spare sixth unit was also provided. The centrifuges replaced the previous belt filter press system, resulting in higher cake solids, reduced biosolids hauling volumes, improved odor control, and lower operating costs.
RELEVANT STANDARDS
24/7/365 Treatment plant reliability
Comply with environmental permit requirements
Maintain a proactive asset management program
Safe, beneficial reuse of biosolids
PROBLEM
The centrifuges have been in operation since 2019 and have exceeded the Original Equipment Manufacturer (OEM) recommended interval for a major overhaul. To maintain equipment reliability and ensure continued high-speed operation, each centrifuge requires a major overhaul, including a thorough inspection, replacement of worn components, and rebalancing.
PROPOSED SOLUTION
The recommendation is to establish a service agreement with the OEM service provider Alafa Laval Inc., for major overhauls and field services for six centrifuges.
TIMING CONCERNS
OC San does not currently have an active service agreement. The centrifuges are past the manufacturer’s recommended major overhaul interval. Further delaying these major overhauls will potentially increase the risk...
Click here for full text