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File #: 25-0520    Version: 2 Name: 4/21/25 - Replacement of Three Centrifuge VFDs at WRRF
Type: Resolution Status: Consent Agenda
File created: 4/21/2025 In control: City Council
On agenda: 4/21/2025 Final action:
Enactment date: Enactment #:
Title: Resolution to Approve a Sole Source Purchase Order with Andritz Separation Inc. for the Purchase, Programming and Installation of Three Variable Frequency Drives for Centrifuges at the Water Resource Recovery Facility ($69,989.00)
Attachments: 1. Ann Arbor Sole Source Letter Feb 28 2025.pdf, 2. Andritz_2025_CI_ND (2).pdf, 3. Ann Arbor LWD - Andritz Separation Inc.pdf, 4. Andritz PO - 2025.03.26 Final.pdf
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Title

Resolution to Approve a Sole Source Purchase Order with Andritz Separation Inc. for the Purchase, Programming and Installation of Three Variable Frequency Drives for Centrifuges at the Water Resource Recovery Facility ($69,989.00)

Memorandum

Your approval is requested to authorize the sole source purchase order with Andritz Separation Inc. for the purchase, programming and installation of three Variable Frequency Drives (VFDs) for centrifuges at the Water Resource Recovery Facility (WRRF) in the amount of $69,989.00.

 

The centrifuges are used 5-7days a week to dewater excess process sludge at the WRRF which is integral to the compliance of our National Pollutant Discharge Elimination System (NPDES) permit. The VFDs control the speed of the centrifuge motors which is essential to the sludge dewatering process. Of the three VFDs being replaced one has failed and two are at the end of their useful life.  VFDs of this size have a typical life span of 8-12 years and the current VFDs were put into service in 2012.

 

Andritz Separation Inc. is a sole source provider of Andritz equipment for all replacement parts, accessories, proprietary control system logic and services. The WRRF’s Centrifuges were manufactured by Andritz Separation Inc.

 

It is recommended that City Council approve a sole source purchase order for Andritz Separation Inc. for the purchase, programming and installation of three VFDs at the WRRF.

 

Budget/Fiscal Impact: Funds to finance this purchase are included in the approved FY25 WRRF Operations and Maintenance budget of the Sewage Disposal System Fund. City Charter language requires sole source goods procurement over $25,000.00 receive City Council approval.

Staff

Prepared by:     Nicholas Jaworski, Water Resource Recovery Services Asst. Manager

Reviewed by:     Keith Sanders, Water Resource Recovery Services Manager

Reviewed by:    Jordan Roberts, Public Services Area Administrator

Approved by:    Milton Dohoney Jr., City Administrator

Body

Whereas,  Three Variable Frequency Drives (VFDs) need to be replaced at the Water Resource Recovery Facility (WRRF) due to a failure of one drive and the end-of-useful-life of the two remaining drives;

 

Whereas,  Replacement of the VFDs is important to maintaining compliance with the WRRF’s National Pollutant Discharge Elimination System (NPDES) permit;

 

Whereas,  Andritz Separation Inc. is the sole supplier of all Andritz equipment parts, accessories, proprietary control logic systems and services;

 

Whereas,  Andritz Separation Inc. complies with the City’s conflict of interest,  non-discrimination  and living wage ordinances; and

 

Whereas,  Funds to finance this purchase are included in the approved FY25 WRRF Operations and Maintenance budget of the sewage disposal system;

 

RESOLVED,  That City Council approves the sole source purchase order with Andritz Separation Inc. for replacement, programming and installation of three VFDs at the Water Resource Recovery Facility ($69,989.00); and

 

RESOLVED,  That the City Administrator be authorized to take the necessary administrative actions to implement this resolution.