Recycling Treated Municipal Wastewater for Industrial Water Use

Section 3
Inventory of Major WWTPs and Potential Industrial Reuse Demands
Craddock Consulting Engineers 3-43
In Association with CDM & James Crook
WWReuseTM1_Sec 3_final.doc
The inventory for the metro area is restricted to the Met Council plants and Rogers
WWTP (since it resides in the seven county area). Information is provided on a plantbasis
organized by watershed. The following sections summarize the industries
within 1- and 5-miles zones of the plant. These zones are represented as circles on the
maps. A brief summary of the range of flows for the industries in these two zones is
provided, followed by a list of the industries. The purpose of this inventory is to
define the ‘universe’ of potential industrial reuse customers. Task 2 will apply
selected criteria to rank and identify industrial reuse customers for a more detailed
analysis.
Minnesota River Watershed WWTPs
The Blue Lake and Seneca WWTPs reside in the Minnesota River watershed. Both of
these facilities are in the design phase of process improvements and expansion. The
plants are currently rated at 37 and 39 mgd, respectively.
A variety of industries are located within a 5-mile radius of the Blue Lake WWTP, as
shown on Figure 3.20. Table 3.18 lists all these industries and identifies the water
source. Non-metallic and metal processing facilities are the most abundant type of
industry. The water demand for industries near the Blue Lake WWTP is 0.13 mgd for
nonpotable (not supplied by a municipal water supply system and obtained through
an appropriations permit) ground water, and 3.8 mgd for a combination of potable
and nonpotable supplies. The largest water user in the 5-mile zone was ADC
Telecommunications Inc for metal processing. They used 1.44 mgd of municipal water
in 2005. Prior Lake Aggregates, a sand and gravel washing business, had the second
highest demand with 0.4 mgd. There were no facilities within a 1-mile radius.
The Seneca WWTP has a larger number of industries within a five-mile radius and
one food processing industry, Best Brands, within 1 mile of the plant. Figure 3.21
shows these industries spatially and Table 3.19 lists the industries. The metal
processing category has the largest number of facilities, but most have demands less
than 0.05 mgd, except for Polar Semiconductor Inc, which used 1.7 mgd in 2005 and
Cypress Semi-Conductor, which used 2 mgd in 2005. The food products industries in
the 5-mile zone had the next largest demand. The total demand for the industries
permitted by Met Council was 9.7 mgd in 2005. Other industries within the 5-mile
zone include some that do not discharge to the Met Council sewers, but are large
water users, such as Xcel Energy. Nearly 300 mgd of nonpotable supply was used by
industries in the 5-mile zone of the Seneca Plant, of which 2.7 mgd was ground water.