Krofta Multifloat

Processing effluent from multiple wastewater streams is a challenge faced by many operations in a number of industries. Engineered with a rectangular footprint, the Krofta Multifloat from Ecolab maximizes limited floor space while providing superior DAF technology.

Equipment details

  • Features & Benefits

  • Multifloat at a Glance

  • 50 – 3000 GPM capacities
  • Automatic level control
  • Ability to add or remove FECs
  • 304L or 316L stainless steel construction
  • Fewer moving parts
  • Low operating costs
  • Consistent sludge removal
  • No scraping mechanism needed
  • Automatic purging
  • Plexiglas windows for process observation
  • Explosion proof design
  • Skid mount packages available with complete process piping, control panel, compressor, chemical feed equipment and pumps

  • High capacity performance
  • Automatic flow fluctuation for accurate tank level control
  • Vertical or horizontal configuration
  • Varying flow capacity accommodation
  • 34 standard sizes offering wide-ranging capacities
  • Floated sludge and settled solids removal

Rectangular dissolved air flotation clarification
Designed for a number of industrial and municipal applications, the Krofta Multifloat from Ecolab utilizes proven DAF technology to provide lower maintenance and reduced operating costs. The system additionally offers multiple standard designs to meet the most rigorous production requirements.

How it works
Dissolved Air Flotation (DAF) technology was developed by Milos Krofta and now serves as one of the most effective solutions for wastewater treatment in a number of applications including food and beverage processing, municipal wastewater and industrial processing. The Krofta Multifloat rectangular clarifier utilizes DAF technology to float solids to the top of the water surface where it is removed as sludge.

Steps in the Krofta Multifloat process:

  • Raw wastewater mixed with aerated recycle flow is added at the base of the unit
  • A header pipe evenly distributes the flow to individual FECs in the floatation tank
  • Flow is retained for a minimum of 3-4 minutes
  • Flocculated particles attach to the aerated water
  • Flocculated particles rise along the plates toward the surface
  • The plates assist in the rise rate by reducing the hydraulic head over the particles
  • Clarified water is drawn back down between the FECs to a collection area
  • Clarified water flows up over a divider plate at the top of the tank into a reservoir
  • Clarified water is discharged by gravity
  • A portion of the flow is captured and recycled back to the air dissolving tube (ADT)
  • Floated materials are collected at the top-directed toward the sludge collection rake
  • Rake pushes the floated material over a simple beach design
  • Floated material is deposited into a small sludge collection trough
  • Material is discharged by gravity
  • Krofta automatic level control system maintains a constant level 
  • Grit or other debris, which do not float, are collected in the v-bottom of the unit, and purged by an automatic valve
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