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Operating cost savings with ultrasound disintegration

High standards towards efficiency

Focus of the R&D for the DesiUS has been the requirement to achieve the highest possible ultrasonic cavitation performance along with the highest machine reliability. The core technology of the DesiUS is the BioPush flow- through cell, which due to its high-performance surface converter generates a homogeneous cavitation field within the reactor. Thus the technology has shown itself to be considerably superior to the otherwise common rod-type transducer technology.

In addition, thanks to its design the BioPush is up to 100% maintenance-free. Thus problematic substrates, such as highly thickened mixed sludge of municipal water treatment plants, are handled with full performance. In principal, a macerator is installed upstream of the turnkey plant. Its main purpose is to protect the machine from hazardous particles. Via a screw pump the sludge is led through the sound field with controlled speed to adjust the required specific energy. A PLC control system along with all necessary sensors for process control and supervision provides user-friendly, robust and trouble-free operation.

Technical advantages

  • Very high energy efficiency – up to 50 % savings compared to other disintegration systems
  • Extremely low-maintenance plant technology
  • High degree of operational reliability
  • Long standing times
  • Can be ideally adapted to the respective requirements
  • Lower space requirement thanks to compact design, simple plug & play installation
  • Quick pay back

DISINTEGRATION BY ULTRASOUND

Disintegration means the breakdown of biogenic sludge into minute particles by external forces.

The resulting increase in surface area causes an acceleration of the organic breakdown process, and thereby results in an increased biogas yield. In addition, the release of exoenzymes from the external cell layer increases the enzyme activity in the digester. In ultrasonic disintegration, the electrical oscillations created by a generator are transformed by a converter (sonic transducer) into mechanical vibrations. These vibrations are transferred into the surrounding medium by means of a device known as a sonotrode. Following the rhythm of the ultrasonic frequency, they cause high alternating positive and negative pressure phases, depending on whether the oscillator is expanding or contracting at the time. During the negative pressure phase, microscopical cavities are formed in the liquid exposed to the ultrasonics; these then collapse in the subsequent positive pressure phase.

This process is known as cavitation. From the implosion, which releases high pressures and temperatures, strong impact and shear forces occur in the area immediately around the cavities, and these cause the surrounding micro-organisms to disintegrate.The core of the DesiUS is the ultrasonic technology from Weber Ultrasonics. The BioPush reactor developed specifically for the treatment of biogenic slurries fulfils the demanding requirements of the disintegration process, and in many aspects is significantly better suited than the usual rod transducers or sonotrode technology.

DesiUS – the “turbo” for your waste water treatment plant

DesiUS (Disintegration Ultrasound System) represents energy-efficient and processrobust cell opening technology

DesiUS (Disintegration Ultrasound System) represents energy-efficient and process-robust cell opening technology combined with exceptionally high efficiency. The robust and completely maintenance-free construction of the BioPush reactor allows a simple and uncomplicated structure. The ultrasonic reactors of the turnkey constructed plant are charged via a screw pump. The substrate is routed through the sound field at a specific speed in such a manner that the specific energy input required for treating the substrate is ideally achieved. A macerator protects the machine from foreign objects and provides coarse homogenization upstream, in order to achieve optimal coupling of the ultrasound. A PLC-supported control system enables robust and trouble-free operation. In addition, the machine is equipped with sensors that monitor temperature, pressure and volumetric flow.

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