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Wastewater treatment plants Intensified sludge treatment by ultrasound .

Ultrasound systems on wastewater treatment plants Areas of use and advantages primary settlement tank aeration tank secondary settlement tank return activated sludge excess sludge digester dewatering digested sludge Integration of the ultrasound technology in municipal and industrial wastewater treatment plants Ultrawaves‘ high-power ultrasound systems can be used for a large Degrees of volatile solids degradation of 50% are rarely achieved. number of applications in both municipal and industrial wastewater The cause of this lies in the difficult to access and degrade bacterial treatment...

the cell contents and endo-enzymes to be released. These enzymes further accelerate the degradation process. The entire digestion process is intensified and the organic fraction is further degraded. An important advantage from this is a significantly increased production of biogas and reduction in the quantity of residual sludge to be disposed of. As a result of the smaller quantity of residual organic matter, the dewaterability of the digested sludge is also facilitated (less flocculent addition) and increased (higher degree of dewatering). This disintegration of the sludge reduces its...

Wastewater treatment Nitrogen degradation: The biological nitrogen degradation takes place through nitrification and denitrification. A successful degradation process requires an additional carbon supply to be provided for the denitrification stage. Normally, methanol or another external carbon source is bought in and added to the process for this purpose. Sonication of the excess sludge with ultrasound breaks down the biomass. This releases the cell contents – i.e. ideal carbon carriers – which are then available as an internal source of carbon in the denitrification stage. Biological...

Practical results Bamberg wastewater treatment plant – one of the first reference plants 3.000 2.750 two ultrasound systems (5 kW each), which sonicate an excess sludge volumetric flow, of around 80 m³ daily. On the long-term average, we have recorded an average specific energy consumption as low as 2.4 kWh/m³. This remarkably low value shows that use of our ultrasound equipment is far more economical in practice than is often assumed, and is not comparable to often published data from experimental laboratory tests. “Permanent positive development of biogas production and degradation rate...

Reduction in greenhouse gas emissions Positive CO2 balance due to ultrasound Electricity produced from biogas is climate-neutral, which is particularly positive for the greenhouse gas balance. Therefore, by using the Ultrawaves ultrasound systems, the CO2-neutral energy production can be further increased. “Significantly lower CO2 emissions.” The mathematical model drawn up by Ultrawaves calculates the emission reduction achieved by using ultrasound, as the following example shows: In a wastewater treatment plant with 100,000 p.e. nitrogen reloading in the biological wastewater treatment...