AnoxKaldnes™ MBBR & IFAS

Moving Bed Biofilm Reactor and Integrated Fixed-Film Activated Sludge Processes

The AnoxKaldnes™ MBBR Moving Bed Biofilm Reactor process is a biological wastewater treatment process that utilizes specialized plastic carriers to create a surface on which a biofilm can attach. The carriers are mixed in the reactor, and their large surface provides capacity for a large biomass inventory, reducing the volume required for treatment. In the AnoxKaldnes MBBR process, most of the biomass resides in the biofilm on the carriers.

The AnoxKaldnes IFAS Integrated Fixed Film Activated Sludge process uses the same AnoxKaldnes MBBR media, the difference being the carriers are used in an activated sludge environment. The suspended-growth biomass of the activated sludge and the biofilm on the carriers work together to provide higher treatment capacity in a smaller volume than that required for activated sludge alone. This IFAS biological treatment system has been retrofitted into a variety of configurations and geometries, including rectangular plug flow reactors, "donut" A2O systems, and now sequencing batch reactor (SBR) systems.

K5 Media Biofilm Process

We design our systems around the full range of precisely engineered AnoxKaldnes biofilm media to meet the varying demands of our clients' wastewater treatment applications with a process guarantee. Floating media options include the high surface area AnoxKaldnes K5 media and the Z-MBBR carrier. The Z-MBBR carrier provides precise biofilm thickness control. The high surface area of all AnoxKaldnes carriers provide two key benefits. First, it reduces the required footprint needed for treatment, thereby reducing capital installation costs. Second, it provides additional process volume for future media addition to allow for facility expansion.

AnoxKaldnes™ MBBR and IFAS Benefits

  • Easy to operate and control
  • Proven performance for BOD, Ammonia, and Total Nitrogen removal
  • Small footprint - often half the size of traditional activated sludge systems
  • Highly adaptable to wide variety of new or existing tank configurations
  • Allows for future expansion without additional construction by just adding media
  • Adaptable to variable flows and loads
  • Nitrification in cold weather
  • Prevents washout of nitrifiers by retaining biomass on the media
  • Perfect for plant retrofits and expansions
  • No maintenance, stainless steel aeration grids
  • Turnkey solutions

LagoonGuard™ MBBR

AnoxKaldnes LagoonGuard has long been known for its consistent ammonia removal. Built upon the MBBR moving bed biofilm reactor platform, LagoonGuard provides robust nitrification in concert with the site’s existing lagoons. Now, LagoonGuard has just become simpler for small and medium-sized lagoon systems required to meet ammonia limits. More than ever, LagoonGuard now provides:

Simplicity. Kruger now offers the tried-and-true LagoonGuard in a simple, standardized reactor size to provide an efficient retrofit activated sludge system to design and construct.

Efficient Design Support. Standardized designs bring the efficiency of faster turnaround times for submittals, drawings and client support.

Lower Cost. Repeatable design and manufacturing provide Kruger’s most cost-effective LagoonGuard yet for our clients. Engineering time and costs are optimized to provide an economical solution that still carries the trusted Kruger name. 


Customized biological solution in a standardized package

By integrating the Moving Bed Biofilm Reactor, biological treatment technology developed and mastered by Veolia subsidiary AnoxKaldnes over 25 years ago, the MBBR Pack meets market needs with a turnkey solution. 

Plug-and-Play. The MBBR Pack provides all the advantages of a conventional MBBR system, in a standard prefabricated, easy-to-install package. By combining the modules with each other, you get a packaged solution that can meet your specific plant needs.