m
m
Line 15: Line 15:
 
<td>Pretreatment settling devices</td>
 
<td>Pretreatment settling devices</td>
 
<td>Screening & settling</td>
 
<td>Screening & settling</td>
 +
<td>Medium</td>
 +
<td>Medium to High</td>
 +
<td>Medium<sup>1</sup></td>
 
<td>Low to Medium</td>
 
<td>Low to Medium</td>
<td>Medium to High</td>
 
<td>Medium to High<sup>1</sup></td>
 
<td>Low to Medium to High</td>
 
 
<td>Low to Medium</td>
 
<td>Low to Medium</td>
 
</tr>
 
</tr>

Revision as of 16:24, 14 July 2016

Pretreatment practice summary of characteristics
Link to this table

Pretreatment practice Mechanism of pollutant removal Relative pollutant removal Capital cost Relative maintenance frequency Relative maintenance effort Relative space requirements
Pretreatment settling devices Screening & settling Medium Medium to High Medium1 Low to Medium Low to Medium
Pretreatment screens Screening Low Low High Medium Low
Pretreatment vegetated filter strips Screening & Settling Medium Low Low High High

1 Pretreatment settling devices are prone to plugging, which will drive maintenance costs up.