Ultrawaves® BioSolids Treatment Solutions – Sludge Disintegrator

Ultrawaves offers a specially developed ultrasonic reactor for a more efficient wastewater treatment method.


As with other acoustic waves, ultrasound subjects substances (water in this case) to alternating compression and expansion. At high intensities ultrasound breaks up the aqueous medium during the expansion phase. As a result, microscopically small cavities filled with water vapor or gas are formed in the fluid.

During the subsequent compression phase these bubbles implode as a result of the extreme conditions generated on the micro  level – this process is known as cavitation. Pressures as extreme as 500 bar and temperatures up to 5,200 Kelvin are attained. The implosion of the gas bubbles produces powerful shear forces that break up the surface of bacteria, fungi and other cellular matter.

At lower frequencies (20kHz–100kHz), large cavitation bubbles are produced, the collapse of which cause these extreme hydraulic shear forces and effects. In the middle frequency (100kHz-1MHz) smaller, but nonetheless effective cavitation bubbles are produced and radical “sonochemical” reactions occur in the water. When sonicated at frequencies higher than 1MHz the liquid starts to stream on the molecular level.
At different acoustic frequencies the following remediation effects can be obtained:

20kHz-100kHz – Disintegration of cells, disinfection, destruction of polymers, release of enzymes

100kHz-1MHz – Break up of the structure of (chloro-)organic compounds such as chlorophenol, TBT, MTBE, release of enzymes

1MHz-10MHz – Desorption of absorbed organic molecules from solid surfaces, biologically available matter, simultaneous biological degradation

The Ultrawaves Reactor

Ultrawaves offers a specially developed ultrasonic reactor for a more efficient wastewater treatment method. The key aim in constructing the ultrasound apparatus is to produce a high degree of efficiency by rupturing the organic matter suspended in the fluid treated. This is why the reactor space in the Ultrawaves reactor has been optimized to obtain cavitation uniformly through out the flow area.

The result is an exceptionally compact patented machine with a volume of only 28 liters. In comparison to traditional tanks/basins this is a “micro-reactor”. The standard model is normally fitted with five oscillating
units. Air-cooled piezo-ceramic transducers perform the transformation of electrical energy into mechanical acoustic energy.

With the standard model it is possible to treat a sludge flow of up to thirty cubic meters per day. For wastewater containing a lower concentration of biosolids the flow rate can be set higher.


  • Compact Construction
  • Easy Attachments
  • Traditional Pump System Interface
  • Safety in Use
  • Modular Characteristics
  • Untreated WAS 30s Sonicated 90s Sonicated
  • Working Capacity of 30m3/day


  • Decrease in digestion time (by up to 60%)
  • Reduction in digested sludge mass (by up to 30%)
  • Increased biogas production (by up to 50%)


Ultrawaves Reactors can be usefully employed for the following:

Aerobic or anaerobic stabilisation of sewage sludge and biomass by:

  • Intensifying the degradation process
  • Reducing time required for treatment
  • Reducing digester tank volume necessary
  • Reducing quantity of sludge/biosolids disposal
  • Increasing exploitable biogas production
  • Improved dewatering capability

Combating foam and bulking sludge by:

  • Preventing flotation by destroying the filamentous bacteria causing it
  • Improved settling of sludge
  • Avoiding foaming in the digestion process

Biological elimination of nitrogen (denitrification) by:

  • Production of internal hydrogen sources
  • No need to purchase external substrates

Disinfection of “murky media” (wastewater, industrial water,water sludge):

  • A new procedure using ultrasound in combination with ultraviolet light is
    about to be introduced.