Mobile Container Plant

With the help of our mobile container plants, the ultrasound treatment and digestion of sludges and biomasses can be observed and the effect of the ultrasound verified by means of firm results.

Varying operating conditions make it difficult to reliably assess treatment processes. This also applies to the process of anaerobic sludge stabilisation in wastewater treatment plants and fermentation in biogas plants. The mobile ULTRAWAVES container plant offers the opportunity to precisely determine the effects of ultrasound treatment on the anaerobic degradation of sludge and biomass under controlled and practical conditions. The advantages of the ultrasound disintegration can be seen in direct comparison to conventional digestion process. In addition, in biogas plants, it is possible to simply test the influence of varying substrate composition on the biogas production.

Effect of ultrasound

Ultrasound causes difficult to access bacteria biomass to break down, which results in better availability for the subsequent degradation process. The digestion process is intensified. As a result, the production of biogas increases and the organic fraction of residual sludge is reduced.

Equipment and technical layout

The plant is installed in a 20’ container and is made up of 5 digesters each with a volume of 200 litres and fitted with stirrers for complete mixing. The temperature can be regulated from 32 to 60°C. The gas volume is measured by five separate gas meters. Our standard ULTRAWAVES ultrasound unit is installed to sonicate the sludge. The high-power ultrasound system can be connected to any number of digesters (maximum five) upstream. The operation is semi-continuous from the sludge collection tank. In parallel operation of the digesters a range of parameters can be modified: the sonicated volumetric flow, the hydraulic retention time and the ultrasound energy input.

The following elements compose the container plant

  • 20’ container (6.1 m x 2.4 m x 2.6 m)
  • 5 digesters (each 200 litres, fully mixed)
  • 1 Ultrawaves ultrasound system (connected power 5 kW)
  • 1 supply pump (Q = 100 - 900 litres/hour)
  • 1 sludge collection tank
  • 5 automatic, individual gas meters

Incorporation of the mobile container plant

For the installation of the mobile container plant only connections for sludge inlet and outlet as well as water for rinsing are necessary. A power connection for 400 V and 32 A is also required. The installation is carried out with the assistance of the Ultrawaves service staff. With our support, the operation and monitoring of the mobile container plant are secured. The provision of the mobile container plant is carried out on a rental basis. Generally, we plan an operation time of three to six months for sludge digestion pilot tests. If necessary, the plant may be rented over a longer period of time.

Flow diagram of sludge streams (here, for example, two control and three “sonicated” digesters)

Advantages

Pilot tests by using our high-power ultrasound system on your plant provide you reliable data on the impact of ultrasound regarding:

  • Improved biogas production
  • Decreased organic fraction in the residual sludge
  • Reduced amount of substrate load to the fermenter
  • Increased methane content of the biogas

This represents the best basis that can be found to decide whether to integrate the Ultrawaves ultrasound system to improve the efficiency of your plant.

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