Difference between revisions of "Comparative BMP phosphorus removal"
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<th>BMP Group</th> | <th>BMP Group</th> | ||
<th>BMP Design Variation</th> | <th>BMP Design Variation</th> | ||
| − | <th>Average TP Removal Rate<sup>b</sup></th> | + | <th>Average TP Removal Rate (%)<sup>b</sup></th> |
| − | <th>Maximum TP Removal Rate<sup>c</sup></th> | + | <th>Maximum TP Removal Rate (%)<sup>c</sup></th> |
| − | <th>Average Soluble P Removal Rate<sup>dg</sup></th> | + | <th>Average Soluble P Removal Rate (%)<sup>dg</sup></th> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td Rowspan="2">Bioretention</td> | <td Rowspan="2">Bioretention</td> | ||
<td>Underdrain</td> | <td>Underdrain</td> | ||
| − | <td>50 | + | <td>50</td> |
| − | <td>65 | + | <td>65</td> |
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 59: | Line 59: | ||
<td>50</td> | <td>50</td> | ||
<td>75</td> | <td>75</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 65: | Line 65: | ||
<td>60</td> | <td>60</td> | ||
<td>75</td> | <td>75</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 72: | Line 72: | ||
<td>40</td> | <td>40</td> | ||
<td>55</td> | <td>55</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
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<td>55</td> | <td>55</td> | ||
<td>75</td> | <td>75</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
</table> | </table> | ||
Revision as of 13:13, 13 May 2013
General summary of comparative BMP phosphorus removal performancea,e,f
Link to this table
| BMP Group | BMP Design Variation | Average TP Removal Rate (%)b | Maximum TP Removal Rate (%)c | Average Soluble P Removal Rate (%)dg |
|---|---|---|---|---|
| Bioretention | Underdrain | 50 | 65 | 0 |
| Infiltration | 100 | 100 | 100 | |
| Filtration | Media Filter | 50 | 55 | 0 |
| Vegetative Filters (dry) | 0 | 55 | 0 | |
| Wet Swale | 0 | 40 | 0 | |
| Infiltrationf,i | Infiltration Trench | 100 | 100 | 100 |
| Infiltration Basin | 100 | 100 | 100 | |
| Stormwater Ponds | Wet Pond | 50 | 75 | 0 |
| Multiple Pond | 60 | 75 | 0 | |
| Stormwater Wetlands | Shallow Wetland | 40 | 55 | 0 |
| Pond/Wetland | 55 | 75 | 0 |
a Removal rates shown in table are a composite of five sources: ASCE/EPA International BMP Database;Caraco (CWP), 2001; MDE, 2000; Winer (CWP), 2000; and Issue Paper D P8 modeling
b Average removal efficiency expected under MPCA Construction General Permit Sizing Rules 1 and 3
c Upper limit on phosphorus removal with increased sizing and design features, based on national review
d Average rate of soluble phosphorus removal in literature
e See also Calculating stormwater volume and pollutant reductions and credits
f Note that the performance numbers apply only to that portion of total flow actually being treated; it does not include any runoff that by-passes the BMP
g Note that soluble P can transfer from surface water to ground water, but this column refers only to surface water
h Note that 100% is assumed for all infiltration, but only for that portion of the flow fully treated in theinfiltration facility; by-passed runoff or runoff diverted via underdrain does not receive this level of treatment