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Passive System with Pretreatment Sediment Pond Utilizing a Loose Material Dual Product System with Matting and Wattles

[fa icon="calendar"] May 31, 2017 8:43:22 AM / by Dober Corporate Website

Dober Corporate Website

In our blog post titled “Construction Site Runoff? You have options!,” we introduced HaloKlear Floc Socks. HaloKlear Floc Socks from Dober are sturdy, connected, fabric pouches containing an all-natural flocculant that dissolves slowly as moving water passes over them, creating dense flocs – with great shear strength and low water content – that settle out quickly. Solids are efficiently removed from the water, allowing your crew to focus on their work – instead of on dirty water. In addition, the HaloKlear Floc Socks are extremely flexible, and can be used in active, passive, and semi-passive treatment environments.

 

This post will outline HaloKlear Floc Sock use for a Passive System with Pretreatment Sediment Pond Utilizing a Loose Material Dual product System with Matting and Wattles.

 

WHAT IS ITS PURPOSE?

To clean construction storm water from a pond using a passive system prior to discharge into a regulated water body.

 

WHERE AND HOW IS IT COMMONLY USED? (SEE SCHEMATIC)

  • On a stream of construction run off to treat the water prior to discharge.
  • Sedimentation pond utilizes natural gravitation settling. Flocculant enhancement and outlet flow control allow for higher performance over gravitational settling alone.

 

WHEN SHOULD IT BE INSTALLED?

  • Before construction activities begin
  • While construction activities are occurring
  • To treat water when larger amounts of sediment loads are present
  • As a pre-treatment for secondary treatment
  • When discharging into a non-high quality water body

 

WHEN SHOULD IT NOT BE INSTALLED?

  • When precise dosing of treatment chemicals is required
  • When discharging into a high quality water body

 

WHAT NEEDS TO BE INSPECTED?

  • Is there excessive sediment loading in the pond?
  • Is the natural flocculant material in good condition?
  • What is the condition of the matting and wattles?
  • Is the water exiting the system of sufficient clarity?
  • Does the residual water test show any remaining natural flocculant in the effluent water?

 

WHAT MAINTENANCE ACTIVITIES CAN BE EXPECTED?

  • Removal of sediment from pretreatment pond
  • Addition of natural flocculant when necessary
  • Cleaning or replacement of matting and/or wattles

 

NOTES

  • Natural flocculants in general should not be directly released into civic storm water systems or natural watercourses.
  • Discharging water through vegetated areas or additional BMP’s can further reduce turbidity.
  • Natural flocculants will completely degrade with enzymatic action.
  • Dose rate of chemical is dependent on flow rate and volume of water. See approximate flow/dose table on attached drawing.

 

Learn more by viewing the corresponding configuration:

VIEW SCHEMATIC

 

Topics: Dual Product System, HaloKlear Floc Socks

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