Recycling Treated Municipal Wastewater for Industrial Water Use

Recycling Treated Wastewater For Industrial Water Use in MN
March 15, 2007 Industry Stakeholder Workshop
Issues Table
Technical Issues
Topic Discussion
Reliability • Concerned about control of water quality and quantity
o Industries perceive they have that control now
o Relates to their performance
• How will seasonal quantity requirements be addressed?
• Expect to have some source as a backup
o Maintaining a backup supply has a cost
Need to exercise equipment and maintain pipes
Maintain intakes and other features
Need to account for this in a facility analysis
o Will there be permit changes for the backup supply?
Could affect both NPDES and Appropriations permits
Ex: some permits have flow-based restrictions that will trigger requirements.
• If a reclaimed supply is not available and a backup supply must be used
and the amount/quality exceeds a permit limit or requirement – who pays
the penalty or the extra costs to meet the permit limit (which would not
have been incurred if the reclaimed supply had been available)?
o If backup supply is used – need to handle two different source waters and the quality
differences
o Could reduce the storage requirements if another supply is used to augment rather than
just backup a reclaimed supply
Need to assess the quality issues with a blended supply
Need to assess the infrastructure requirements (piping, valving, painting and
signage) and costs for a specific application
• Reclaimed supply can also be a backup to the main supply (emergency source if the ground or
surface water supply has a contamination – comment brought in from March 8 meeting)
• Who handles the maintenance, particularly of the transmission mains? Will the municipality
have access?
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