2008 - 2017 Capital Improvement Program

Project #8062, Metro Solids - Biosolids Storage

Description:

This project will implement bio-solids stabilization, storage and utilization, to supplement the fluid bed incineration and energy recovery system that has recently been completed. This project is part of the MWWTP Solids Processing Facility Plan.

Project Map

Purpose and Justification:

Alkaline stabilization facilities were incorporated into the Solids Management Building, however storage facilities were deferred pending further development of a bio-solids management plant. This project will include a review of USEPA Class A regulations to take advantage of any technology improvements since the original Facility Plan. Major changes to the existing alkaline stabilization process are not anticipated. Biosolids haulers and other end-users will be contacted to help develop a flexible plan that leverages off-site storage options.

The project will also evaluate the viability of providing new anaerobic digesters to process up to 50 dry tons per day (DTPD). Digestion would be available during scheduled incinerator maintenance or to provide transitional capacity to avoid running a third incinerator. Alkaline stabilization would continue to be retained as a back-up process. Recovery and utilization of digester gas would be included in the economic analysis of this alternative. Digestion would also require modifications for storage, dewatering and load-out of digested bio-solids.

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Project Authorization:

	Project Schedule		Authorizations
	Start	End	Funding	Status
Prelim. Engr.	Jul-06	Jun -07	$500,000	Approved
Design	Jul-07	Dec-08	$1,000,000	Approved
Construction	Jan-09	Jun-11	$10,500,000	Approved
Prior Authorization:			$12,000,000
2008 Budget Adjustment:			$0
Total 2008 Authorization:			$12,000,000
Future Authorizations:			$0
Total Project Cost:			$12,000,000

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Projected Cash Flow:

	Authorized	Future	Total
Prior to 2008	$100,000	$0	$100,000
2008 Budget	400,000	0	400,000
2009	1,000,000	0	1,000,000
2010	5,000,000	0	5,000,000
2011	5,000,000	0	5,000,000
2012	0	0	0
2013	0	0	0
2014	0	0	0
2015	0	0	0
2016	0	0	0
2017	0	0	0
Post-2017	0	0	0
Contingency	500,000	0	500,000
Totals	$12,000,000	$0	$12,000,000

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Impact on O&M Costs:

The actual impact on O&M costs is dependent upon the alternative chosen.

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Metropolitan Council

2008 - 2017 Capital Improvement Program