Recycling Treated Municipal Wastewater for Industrial Water Use

Technical Memorandum 3
Recycled Wastewater System Components
and Costs
1.0 Introduction
This technical memorandum is the third in a series of memoranda developed under a
Metropolitan Council (Council) project titled “Recycling Treated Municipal
Wastewater for Industrial Water Use.” Funding for this project was recommended by
the Legislative Commission on Minnesota Resources (LCMR) from the Minnesota
Environment and Natural Resources Trust Fund. The Met Council is providing
additional funding for the project through in-kind contributions of staff time. Other
state agencies are participating via stakeholder meetings and technical review and
input.
The terms “recycled wastewater”, “water reuse”, and “reclaimed water” are
synonymous and used interchangeably in this document and related project documents.
1.1 Objectives
There are three main objectives of this memorandum:
Provide an overview of water reuse system components and the various
technologies to treat wastewater effluent for a range of industrial water uses.
Define water reuse system components and technologies as the basis for the
estimation of the cost of service to supply reclaimed water to Minnesota
industries.
Estimate the water reuse system costs to provide a base level of water quality and
alternative quality water supplies to industries.
1.2 Memorandum Contents
The memorandum is structured to provide overview information as a context for
assumptions made to define water reuse systems serving Minnesota industries and
the associated costs. A “base” level water quality is established, which in turn defines
the treatment processes required, and with other system component assumptions
form a “base water reuse system” (base system). Costs are developed for the base
system and alternatives to meet a range of water quality goals. The memorandum is
organized by the following subsections:
Water Reuse System Components
o Identifies the basic equipment and structures in a water reuse system.
o Establishes a conceptual model that this study uses as a basis for the costs
estimated for a water reuse system.
Craddock Consulting Engineers 1
In Association with CDM & James Crook
TM3-Component&Costs_0707