BSK®-Decanter

The Clear Water Discharge
BSK-Decanter

Advantages of the BSK®-Decanter

Unique Hydraulic Design

Unique Hydraulic Design

Remarkable High discharge volume - already with small diameters

Adjustable discharge volume

Adjustable discharge volume

Two different discharge modes allow the end-user to adapt the water flow according to the specific project conditions

Completely made from stainless steel

Completely made from stainless steel

Used material AISI 304 or AISI 316 only (different material on request)

Hard-wearing gear drives

Hard-wearing gear drives

Well-proven technology protected by an additional weather hood

Fast and easy installation

Fast and easy installation

Simple and prefabricated parts allow a quick setup

No extraction of floating or activated sludge

No extraction of floating or activated sludge

Effective barrier by baffle plate

No wear parts under water

No wear parts under water

Including lifetime lubricated swivel joints

Low operation costs

Low operation costs

Clear water discharge by use of gravity

Applications

Wastewater treatment

  • Activated sludge treatment - Clear water discharge in SBR plants
  • Clarifier - Discharge of floating sludge (special model)
  • Sludge Thickening - Discharge of supernatant

Biogas plants

  • Sludge conditioning - Discharge of supernatant

Water treatment

  • Surface skimming - Discharge of floating material

Structure and Function

Construction of a BSK®-Dekanter

Structure of the BSK®-Decanter

  •   1  Local switch box
           or control box
  •   2  Electrical winch
  •   3  Lifting rope, stainless steel
  •   4  Air vent valve
  •   5  Air vent pipe
  •   6  Conductive sensor
  •   7  Inlet pipe
  •   8  Sludge baffle / barrier for floatings
  •   9  Connection pipe
  • 10  Swivel joint / rotating link
  • 11  Concrete wall
  • 12  Catching rope, stainless steel
  • 13  Discharge of cleared wastewater
  • A  Maximum water level
  • B  Minimum water level
  • C  Sludge level

Function of the BSK®-Decanter

  1. Starting position:
    • Equipped with a maintenance-free submerged swivel joint the BSK®-Decanter is moved up and down by an electrical winch according to the water level
    • Hydraulic optimized openings in the inlet pipe of the BSK®-Decanter ensure a smooth and constant drawing without turbulences
  2. Downward movement:
    • Touching the water body surface potential floating sludge is pushed aside by a sludge baffle before entering the inlet openings
  3. Decanting phase:
    • Any downwards movement will be stopped reliably before reaching the activated sludge blanket level
    • After reaching the preferred water level the BSK®-Decanter moves back to its preset parking position
    • The parking position (straight above the maximum water level) acts as an emergency overflow at the same time
    • The operation of the BSK®-Decanter is realized by two limit switches, secured by two additional limit switches as well as one emergency limit switch (particular average)
Function of the BSK®-Decanter

Types and Sizes

Available Dimensions and Hydraulic Capacities

Available Dimensions and Hydraulic Capacities

The standard BSK®-Decanter is used in 7 different sizes (pipe diameters) ranging from DN 100 up to DN 400. For normative application (WLmax, WLmin, head loss = 1.0 m) the following capacities of each size apply:

Type Qeffluent [m3/h]
BSK® D100    130
BSK® D150    320
BSK® D200    570
BSK® D250    790
BSK® D300 1.180
BSK® D350 1.650
BSK® D400 2.160
Basic Configuration

Basic Configuration

Fabrication in different stainless steel grades possible:

  • Material: stainless steel AISI 304 or AISI 316
  • Motor capacity: 0.12 - 0.37 kW
  • Rope speed: 0.5 m/min
  • Weather protection
  • Option: Dip-in sensor
  • Local control box

Further additional options are available.

Discharge of Clear Water or Supernatant

Discharge of Clear Water or Supernatant

Typically the DCW model is used in SB-Reactors as fully automatic discharge system, whereas the DSC model offers special advantages for sludge thickening – mainly operated manually. Every BSK®-Decanter is especially adapted to its individual application.

Video

References

Our BSK®-Decanters are used worldwide, e. g.:

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