Recycling Treated Municipal Wastewater for Industrial Water Use

Section 1
Introduction
This project will provide a statewide and Minneapolis/St. Paul metro area inventory
of industries and assess their potential as wastewater reuse customers. It will also
outline an implementation plan that addresses the technical, regulatory, institutional,
and financial elements of an industrial water reuse strategy.
The project is comprised of two main tasks:
Task 1: Industrial Water Use (Demand Assessment) to be completed by June 30,
2006
Task 2: Municipal Wastewater Treatment (Supply Assessment) to be completed by
June 30, 2007
The main purpose of this project is to identify whether and how water reuse can
reduce the potential for water supply to be a limiting factor to future industrial
development in Minnesota. Because the state of Minnesota currently has few water
reuse applications, the implementation plan in Task 2 will highlight reuse practices in
other states and the various factors that must be considered for Minnesota to have a
viable water reuse program.
This technical memorandum documents the work completed under Task 1. The main
products of Task 1 include:
an inventory of major industrial water use and users (i.e., potential candidates for
industrial reuse)
identification of regulatory, technical, and institutional elements that are usually
considered in establishing a water reuse program/project
In Task 2, the industrial reuse customer inventory will be evaluated to rank candidate
industrial customers for reuse projects. Costs associated with conveyance and
additional treatment facilities will be estimated for candidate industrial customers.
Costs and non-monetary factors will be evaluated in an implementation analysis and
presented to stakeholders. With stakeholder input, an implementation plan will be
developed that identifies steps the State and/or Met Council could initiate to promote
industrial water reuse projects.
1.2 Water Use in Minnesota
How much water do Minnesotans use and what is it used for? Major water use in
Minnesota ranged from 3.4 to 3.7 billion gallons per day (gpd) during 2000-2004. This
represents all permitted water users that withdraw more than 1 million gallons per
year (mgy) and/or 100,000 gpd of ground or surface water, and therefore, does not
account for most domestic private well or surface withdrawals. The majority of the
water use information reported in this document is based on the records maintained
by the MDNR Appropriation Permits program. While the water use information
presented in this document does not include all uses since it excludes private, low
1-2 Craddock Consulting Engineers
In Association with CDM & James Crook
TM1-Sec1_0707.doc