Recycling Treated Municipal Wastewater for Industrial Water Use
Recycling Treated Municipal Wastewater for Industrial Water Use Recycling Treated Municipal Wastewater for Industrial Water Use
Section 3 Inventory of Major WWTPs and Potential Industrial Reuse Demands Craddock Consulting Engineers 3-29 In Association with CDM & James Crook WWReuseTM1_Sec 3_final.doc Table 3.14a. Industrial Water Use in the Rainy River Watershed 2004 Water Use, mgd Industry Category Ground Water Surface Water Total Mine Processing 0.00 0.01 0.01 Pulp and Paper Processing 0.07 46.70 46.77 Sand and Gravel Washing 0.00 0.14 0.14 Total 0.07 46.85 46.92 Source: MDNR, 2004 WATER USE (MGD 50 45 40 35 30 25 20 15 10 5 0 242 243 USE CODE 244 Ground Water Surface Water 242 Pulp and Paper Processing 243 Mine Processing 244 Sand and Gravel Washing Figure 3.14a. Industrial Processing Water Use in the Rainy River Watershed, 2004 Source: MDNR, 2004 WWTPs There are two municipal WWTPs in this watershed with design capacities greater than 1 mgd: NKASD in International Falls and the Ely WWTP. Table 3.14b summarizes the design capacity and historic flows for the plants. These WWTPs discharged nearly 2 mgd in 2005. There are also several smaller WWTPs that discharge to surface waters with a combined design capacity of 3.3 mgd. This compares to a total WWTP capacity of 7.1 mgd for the watershed. Depending on the location of the industry it is possible that a smaller WWTP could provide an adequate reclaimed water supply.
Section 3 Inventory of Major WWTPs and Potential Industrial Reuse Demands Table 3.14b. WWTPs in the Rainy River Watershed Design Capacity, 2005 Ann Avg Flow as % of Facility Name mgd Flow, mgd Design Capacity NKASD WWTP 2.3 1.264 55.0% Ely WWTP 1.5 0.688 45.9% Total 3.8 1.952 51.4% Source: MPCA, 2005 Industries and Proximity to WWTPs The largest industry is located in International Falls and in close proximity (2.3 miles) to the WWTP, as shown on Figure 3.14c. There are no industries in Ely that have their own water permits. Table 3.14c. Industries in the Rainy River Watershed 2004 Distance to Water WWTP, Closest Industry Name Source* Use, mgd miles WWTP Industry Category UNITED STATES STEEL CORP S 0.010 >10 Ely Mine Processing S Pulp and Paper BOISE WHITE PAPER LLC 46.684 2.3 NKASD Processing S Pulp and Paper KNAEBLE TIMBER INC 0.018 >10 NKASD Processing Pulp and Paper POTLATCH CORPORATION G 0.067 >10 Ely Processing Sand and Gravel SEPPI BROS CONCRETE * G=Ground Water; S=Surface Water Source: MDNR, 2004 S 0.136 >10 Ely Washing Factors Influencing Potential for Industrial Reuse Ground water supplies are limited in the central and eastern portions of the Rainy River watershed. This area is Ground Water Area 3 and is dominated by glacial aquifers that are commonly thin and limited in their extent and yield. The bedrock aquifers also have limited yield; there are no large-scale regional aquifers. Ground water movement in much of the area is difficult to define because of the fractured nature of the bedrock. In the west (Area 4) and north (Area 5) portions of the watershed, the ground water supply in the surficial aquifers are less shallow and have moderate to good yields. This area can be dominated by connections to wetlands and contamination of surface aquifers has occurred. However, overall this watershed has a lowest to low susceptibility to contamination index, except along the southern border and interspersed areas in the watershed. 3-30 Craddock Consulting Engineers In Association with CDM & James Crook WWReuseTM1_Sec 3_final.doc
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Section 3<br />
Inventory of Major WWTPs and Potential <strong>Industrial</strong> Reuse Demands<br />
Table 3.14b. WWTPs in the Rainy River <strong>Water</strong>shed<br />
Design Capacity, 2005 Ann Avg Flow as % of<br />
Facility Name<br />
mgd<br />
Flow, mgd Design Capacity<br />
NKASD WWTP 2.3 1.264 55.0%<br />
Ely WWTP 1.5 0.688 45.9%<br />
Total 3.8 1.952 51.4%<br />
Source: MPCA, 2005<br />
Industries and Proximity to WWTPs<br />
The largest industry is located in International Falls and in close proximity (2.3 miles)<br />
to the WWTP, as shown on Figure 3.14c. There are no industries in Ely that have their<br />
own water permits.<br />
Table 3.14c. Industries in the Rainy River <strong>Water</strong>shed<br />
2004<br />
Distance<br />
to<br />
<strong>Water</strong> WWTP, Closest<br />
Industry Name Source* <strong>Use</strong>, mgd miles WWTP Industry Category<br />
UNITED STATES STEEL CORP S 0.010 >10 Ely Mine Processing<br />
S<br />
Pulp and Paper<br />
BOISE WHITE PAPER LLC<br />
46.684 2.3 NKASD Processing<br />
S<br />
Pulp and Paper<br />
KNAEBLE TIMBER INC<br />
0.018 >10 NKASD Processing<br />
Pulp and Paper<br />
POTLATCH CORPORATION G 0.067 >10 Ely Processing<br />
Sand and Gravel<br />
SEPPI BROS CONCRETE<br />
* G=Ground <strong>Water</strong>; S=Surface <strong>Water</strong><br />
Source: MDNR, 2004<br />
S 0.136 >10 Ely Washing<br />
Factors Influencing Potential <strong>for</strong> <strong>Industrial</strong> Reuse<br />
Ground water supplies are limited in the central and eastern portions of the Rainy<br />
River watershed. This area is Ground <strong>Water</strong> Area 3 and is dominated by glacial<br />
aquifers that are commonly thin and limited in their extent and yield. The bedrock<br />
aquifers also have limited yield; there are no large-scale regional aquifers. Ground<br />
water movement in much of the area is difficult to define because of the fractured<br />
nature of the bedrock. In the west (Area 4) and north (Area 5) portions of the<br />
watershed, the ground water supply in the surficial aquifers are less shallow and have<br />
moderate to good yields. This area can be dominated by connections to wetlands and<br />
contamination of surface aquifers has occurred. However, overall this watershed has<br />
a lowest to low susceptibility to contamination index, except along the southern<br />
border and interspersed areas in the watershed.<br />
3-30 Craddock Consulting Engineers<br />
In Association with CDM & James Crook<br />
WWReuseTM1_Sec 3_final.doc