Pretreatment Practice | Mechanism of Pollutant Removal | Relative Pollutant Removal | Cost | Relative Maintenance Frequency | Relative Maintenance Effort | Relative Space Requirements |
---|---|---|---|---|---|---|
Pretreatment Settling Devices | Screening & Settling | Low to Medium | Medium to High | Medium to High | Low to Medium to High | Low to Medium |
Pretreatment Screens | Screening | Low | Low | High | Medium | Low |
Pretreatment Vegetated Filter Strips | Screening & Settling | Medium | Low | Low | High | High |