Improvement of anaerobic digestion by ultrasound technology
Brief Snapshot of the Plant
Objective of the ultrasound disintegration system
Improvement of the anaerobic digestion to avoid the construction of a fourth digester (initial plan was the construction of a fourth digester (3,000m³) to increase the hydraulic residence time from 18d to 25 d).
Preliminary trial of the ultrasound disintegration system
Current Bamberg WWTP Sludge Flow Sheet
The Results and Benefits of Using Ultrasound
Sludge feed and degradation of volatile solids
Total biogas production, biogas production 1st stage, biogas production of 2nd stage and fraction of biogas production 1st stage
Two ULTRAWAVES US systems à 5 kW are implemented since August 2004. In the beginning the recommended part (30% of the total TWAS flow) was treated at operating 8 hours per day. The thickening process was automated to operating 24 hours per day. Today the treated part amounts to 90% of the total TWAS flow.
Based on early results of the full-scale operation the payback time is calculated with three years.The construction of a fourth digester could be avoided.
Installed Ultrasonic Reactors
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