United States of America
I. Kruger Inc.

4001 Weston Pkwy
Cary, NC 27513

Phone: (919) 677-8310
Fax: (919) 677-0082

AnoxKaldnes™ Moving Bed Biofilm Reactor (MBBR) and Hybas™ (Hybrid Biofilm 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 Hybas™ technology is an application of the IFAS process - Integrated Fixed-Film Activated Sludge. The same AnoxKaldnes MBBR media are used in the Hybas process, 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. Hybas systems have been retrofitted into a variety of configurations and geometries, including rectangular plug flow reactors, "donut" A2O systems, and now sequencing batch reactor (SBR) systems.

The AnoxKaldnes Hybas™ for SBR offers a smaller footprint than the traditional SBR and is easier and faster to construct, resulting in faster permit compliance and less cost to the customer. This creates less disturbance to an existing site, with less excavation and construction involved making the AnoxKaldnes Hybas for SBR the most efficient BNR on the market.

Biofilm media

Kruger offers a range of biofilm media types to meet the varying demands of wastewater treatment applications. Options include the high specific-surface-area AnoxKaldnes K5 carriers. The high surface area of these carriers makes the most of available treatment volumes by concentrating the active biomass. For example, nitrification can be achieved in existing tanks where other media types could not provide enough surface area and consequently, enough biomass.

AnoxKaldnes™ MBBR and Hybas™ Benefits

  • Easy to operate and control
  • Excellent for meeting Total Nitrogen Limits
  • Highly adaptable to wide variety of tank configurations; new and existing
  • Small footprint
  • Nitrification in cold water
  • Easy implementation of pre- and post-treatment to existing plants for process improvements
  • Can accommodate large flow and load changes