Recycling Treated Municipal Wastewater for Industrial Water Use

Section 3
Inventory of Major WWTPs and Potential Industrial Reuse Demands
Craddock Consulting Engineers 3-49
In Association with CDM & James Crook
WWReuseTM1_Sec 3_final.doc
As described previously in the Lower Mississippi River Watershed Inventory section,
Flint Hills Resources is one of the high water demand industries in the watershed,
withdrawing nearly 6 mgd in 2004, and previous discussions with Met Council on
wastewater reuse opportunities have occurred. The industry with the next largest
water use near Rosemount WWTP is Aggregate Industries, with a demand of 1.1
mgd.
The Eagles Point WWTP, which was expanded to 10 mgd in 2003, is situated near a
3M chemical facility which uses most of the 2.8 mgd ground water supply for
industrial process cooling (once-through). Figure 3.25 shows the well field for 3M
within the 1-mile radius and the other industries in the area. The other industries
within a 5-mile radius of the plant used 1.13 mgd in 2004. Over 1 mgd of surface
water was used by Aggregate Industries. Table 3.23 lists the industries.
Table 3.23. Eagles Point WWTP Industries Within a 5 Mile Radius
DNR Water Industry MCES Business
Industry Name
Permit Source* Category - DNR
Industrial Process
Cooling Once
Category
3M Company** x G Through
Advance Corp #1258 M Metal Processing
Sand & Gravel
Metal Products
Aggregate Industries - NCR Inc x S Washing
Non-Metallic
CF Industries x G Processing
HD Hudson Mfg Co M Metal Processing Metal Products
LSP-Cottage Grove LP** x G Power Generation
Spectro Alloys Corp x G Metal Processing
* M: Municipal; S: Surface Water.; G: Ground Water
** Industry located with 1 mile of the WWTP
The Hastings WWTP has several industries within a 5-mile radius, as shown on
Figure 3.26. There is a 0.05 mgd industrial water demand within 1 mile of the plant,
for the facilities listed in Table 3.24. In a 5-mile zone, there are agricultural processing
industries with a combined demand of 0.04 mgd and sand and gravel washing
operations that rely primarily on surface water supplies.
The Empire WWTP was expanded from 9 mgd to 24 mgd and will have a new
discharge to the Mississippi River in the vicinity of the one currently used by the
Rosemount WWTP. Figure 3.27 identifies the industries near the plant and Table 3.25
lists those within a 5-mile radius. The outfall for the Empire WWTP to the Mississippi
River is also shown on the figure. The list of industries in Table 3.25 is restricted to the
radius around the plant, but could be broadened to include industries along the
outfall, which would include those in the Rosemount WWTP proximity. The industry
with the largest water demand near the Empire WWTP is Marigold Foods, which uses
0.32 mgd of ground water supplied by its own well field. Another Food Product
industry, Kemps, has a demand of 0.25 mgd. The other industries in the area have a
combined demand of 0.42 mgd.