Raschig KOMPAKT - Tubular Block Media For Submerged Fixed Bed Systems

Kompakt is a tubular block media consisting of polyethylene tubes heat welded together on the ends to create rugged rectangular modules used predominantly in submerged fixed beds (SFB).

The polyethylene material is biologically and chemically resistant and also neutral to microorganisms. The internal fins of individual tubes provide surface area. The large openings in the media promote complete mixing of the liquid in the reactor which improves treatment efficiency in SFB systems.

Kompakt has been installed in numerous SFB systems worldwide, treating many types of wastewater, including domestic, food processing, chemical, brewery, pharmaceutical, creosote and paper.

Kompakt is designed for use in submerged fixed beds, but existing activated sludge aeration basins can be retrofitted with Kompakt to increase treatment capacity.

• Manufactured of extruded HDPE tubes with or without UV inhibitors
• Welded tube construction results in rugged blocks which can be removed for maintenance or cleaning
• Large openings allow for sloughed biosolids to pass through the media, minimizing clogging
• Available in dry surface areas from 27 to over 100 ft2/ft3
• Easily cut to fit tanks of all dimensions
• Typical block dimensions: 24" x 24" x 24" and 24" x 48" x 24"h. Custom sizes are available.

Many SFB systems consist of fixed media installed in an aeration tank followed by a clarifier. The SFB plant layout is similar to an activated sludge plant but does not require settled sludge to be recycled to the basin because the biomass is attached to the plastic media.

Benefits:

• High operational stability Compact construction
• Operational flexibility Low operating costs

• Smaller footprint and less expensive to construct than activated sludge systems. The SFB aeration tank is smaller because there is more biomass in the SFB reactor. Without sludge recycle, the final clarifier of the SFB systems is also smaller.
• Better suited for treating difficult to degrade organics because the organics are immobilized in the biofilm and broken down by specialized bacteria.
• Lower sludge production and better settling sludge
• Higher oxygen transfer efficiency
• Simplicity of use and installation
• Resistant to shock loadings and biomass wash out