The Sonolyzer™ Ultrasound Sludge Disintegrator technology is one of the most effective sludge reduction technologies available in the market. Ultrasound applied to water at high intensity and low-to-medium frequencies (20 to 35 kHz) generates cavitation, which is the rapid creation, growth and collapse by implosion of microscopic bubbles. This creates extreme mechanical shear forces that cause the disintegration of biomass in wastewater.
- Improved Anaerobic Digestion Process
- Additional gas production
- Increased volatile solids destruction
- Sludge minimization
- Improved dewaterability of sludge
With increasing energy costs and the social pressures for renewable energy and environmental impact minimization, municipal and industrial wastewater treatment plants are on the look-out for technologies to enhance aerobic and anaerobic biological processes.
HOW IT WORKS
Conventional anaerobic digestion of sewage sludge is limited by the hydrolysis step (technical digestion limit). Treating (waste activated) sludge with ultrasound overcomes this limit; the anaerobic digestion process is intensified and further degradation is achieved. This reduces the quantity of digested residual sludge, while biogas production increases.
The Sonolyzer modular ultrasound reactor is made of stainless steel and accommodates five ultrasonic units (Sonotrodes), each powered by a separate generator. The intensity of the Sonotrodes is controlled by the frequency of the generators, located in the area of the Sonolyzer controls. The sludge flow travels in a serpentine pattern that allows full exposure of the sludge at each sonotrode horn.
The Sonotrodes create compression waves which cause cavitation within the sludge. This force results in the decomposition of sludge flocs, disruption of sludge cells, reduction of sludge viscosity and release of active enzymes (which stimulates the subsequent anaerobic degradation process).
- Anaerobic digestion process improvement by way of cell lysis
- Small footprint system, scalable for expanding plant size
- Easy installation, low maintenance requirement and simple operation
- Extending the life of overloaded digesters, by means of sludge minimization and process improvement
- Reduction or elimination of bulking sludge and foaming
Using the Sonolyzer technology, sludge can typically be minimized by a factor of 10-20%, not only increasing the effective size of a digester but also impacting the costs associated with sludge handling. Furthermore, when biogas production is an objective, the process typically improves offerings by as much as 15-20%.
Another benefit of the technology is the nurturing of the denitrification process, as cell lysing provides additional carbon for the biological reactor.