Recycling Treated Municipal Wastewater for Industrial Water Use
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Craddock Consulting Engineers 3-1 In Association with CDM & James Crook WWReuseTM1_Sec 3_final.doc Section 3 Inventory of Major WWTPs and Potential Industrial Reuse Demands This section reviews the historical water use in the state for major industrial users in context with municipal wastewater treatment plants’ (WWTPs’) location and production capacity. A more in-depth review of industries in proximity to reclaimed water suppliers is provided for each individual watershed. General information on the existing water sources in the watersheds and areas that may be prone to water supply problems is also provided. The Minneapolis/St. Paul metro area is examined on a WWTP basis, where industries located within a one- and five-mile radius of each existing metro area WWTP are identified. A brief summary of the industrial reuse customer inventory sets the framework for the evaluation of the inventory in the next stage of the project. In Task 2, the industries or areas where water reuse could have the most impact will be identified and further analyzed to explore treatment requirements, costs, and implementation issues. 3.1 Statewide Inventory Industry Water Use The nine industrial water use categories used by MDNR in their Appropriations Permit database are subdivided in the database into the following: Power Generation o Hydropower o Steam power cooling – once through o Steam power cooling – wet tower o Steam power cooling – ponds o Steam power other than cooling o Nuclear power plant o Power generation (miscellaneous not fitting other categories) Industrial Processing o Agricultural processing (food & livestock) o Pulp and paper processing o Mine processing (not sand & gravel washing) o Sand and gravel washing o Industrial process cooling once-through o Petroleum-chemical processing, ethanol o Metal processing o Non-metallic processing (rubber, plastic, glass) o Industrial processing
Section 3 Inventory of Major WWTPs and Potential Industrial Reuse Demands Water Use (mgd) The majority of water used in the power industry category in Minnesota is surface water used for once-through cooling at steam power generation plants, as indicated in Figures 3.1 and 3.2. The next largest use is for nuclear plant cooling water, followed by other steam power non-cooling water uses. Almost all of the water used by this category is supplied by surface waters, as indicated in Table 3.1. 1,200 1,000 800 600 400 200 0 Nuclear Power Plant 35.8% (852.6 mgd) Steam Power Other Than Cooling 13.7% (326.7 mgd) Steam Power Cooling - Once through 49.6% (1179.1 mgd) Steam Power Cooling - Wet Tower 0.8% (19.5 mgd) Figure 3.1. Power Generation Facilities Water Use, 2004 Source: MDNR, 2004 222 223 225 226 Use Code Ground Water Surface Water 222 Steam Power Cooling - Once Through 223 Steam Power Cooling - Wet tTower 225 Steam Power - Other Than Cooling 226 Nuclear Power Plant Figure 3.2. Power Generation Facilities Water Use, 2004 Source:MDNR, 2004 3-2 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 />
<strong>Water</strong> <strong>Use</strong> (mgd)<br />
The majority of water used in the power industry category in Minnesota is surface<br />
water used <strong>for</strong> once-through cooling at steam power generation plants, as indicated in<br />
Figures 3.1 and 3.2. The next largest use is <strong>for</strong> nuclear plant cooling water, followed<br />
by other steam power non-cooling water uses. Almost all of the water used by this<br />
category is supplied by surface waters, as indicated in Table 3.1.<br />
1,200<br />
1,000<br />
800<br />
600<br />
400<br />
200<br />
0<br />
Nuclear Power Plant<br />
35.8% (852.6 mgd)<br />
Steam Power Other Than Cooling<br />
13.7% (326.7 mgd)<br />
Steam Power Cooling - Once<br />
through 49.6% (1179.1 mgd)<br />
Steam Power Cooling -<br />
Wet Tower 0.8% (19.5 mgd)<br />
Figure 3.1. Power Generation Facilities <strong>Water</strong> <strong>Use</strong>, 2004<br />
Source: MDNR, 2004<br />
222 223 225 226<br />
<strong>Use</strong> Code<br />
Ground <strong>Water</strong><br />
Surface <strong>Water</strong><br />
222 Steam Power Cooling -<br />
Once Through<br />
223 Steam Power Cooling -<br />
Wet tTower<br />
225 Steam Power -<br />
Other Than Cooling<br />
226 Nuclear Power Plant<br />
Figure 3.2. Power Generation Facilities <strong>Water</strong> <strong>Use</strong>, 2004<br />
Source:MDNR, 2004<br />
3-2 Craddock Consulting Engineers<br />
In Association with CDM & James Crook<br />
WWReuseTM1_Sec 3_final.doc