Hydrodynamic Seperators
Separation devices, also known as hydrodynamic separators (HDS), are engineered to improve stormwater quality by utilizing a sump for sediment collection and incorporating chambers, weirs, and baffles to capture pollutants. HDS devices use centrifugal force, separation, and swirling techniques to remove contaminants from runoff.
These devices are capable of removing various pollutants
from stormwater, including
Trash
Debris
Sediment
Oil
Greece
HDS devices can remove up to 50% of coarse particles under local regulations, and are often used as pretreatment systems in conjunction with other stormwater management technologies. Common types of hydrodynamic separators include vault systems, swirl concentrators, and inclined plate separators.
Maintenance Frequency
Initial Installation
Conduct frequent inspections during the first year to monitor sediment and debris accumulation.
Subsequent Years
Perform annual inspections and cleanings, or more frequently if the system fills up quickly.
Maintenance Interval
he frequency of maintenance depends on the volume of pollutants entering the system.
Maintenance Tasks
Inspect
Check for sediment and debris buildup, and measure the sediment depth to determine the need for cleaning.
Clean
Use a vacuum truck or portable vacuum system to remove accumulated solids.
Wash
Utilize a high-pressure water spray to clean sediment and debris from all surfaces.
Dispose
Ensure all water, oil, and sediment are disposed of at a licensed facility in accordance with local regulations.
Maintenance Tips
Separator
Ensure that the separator is easily accessible for inspection and cleaning.
Conduct Maintenance
Conduct maintenance during dry weather, ensuring no flows are entering the system at the time.
Health and Safety
Follow appropriate health and safety protocols during maintenance work.
Pre-Maintenance Steps:
Remove
Remove trash, debris, and leaves from around the separator to prevent clogging.
Sweep
Sweep paved areas surrounding the separator to maintain a clean work environment.
Store
Follow appropriate health and safety protocols during maintenance work.
Regular maintenance will ensure the hydrodynamic separator operates efficiently, reducing pollutants and enhancing stormwater management.