Centrum WWTP, Dabrowa-Gornicza, Poland
Improvement of anaerobic digestion by ultrasound technology
Brief snapshot of the plant
- Design capacity: 130.000 PE
- Actual loading: 200.000 PE (Overloading conditions)
- Biological wastewater treatment: Simultaneous denitrification and nitrification, Bio-P-Elimination
- Sludge treatment: No primary sludge, thickened waste activated sludge (TWAS)
- Separate waste activated sludge thickening: Drum thickener (operating 14h/d)
- Sludge stabilisation: Two digesters (2 x 1,680 m³), mesophilic
- Biogas: Production: 438.000 m³/a, 66% capacity of the CHP used
- Digested sludge dewatering: Band filter press
Objective of the ultrasound disintegration system
- Increase of biogas production
- Improvement of volatile solids destruction
Preliminary trial of the ultrasound disintegration system
- Test phase of five months (February 2009 – June 2009)
- The recirculated digested sludge -concerning 30% of the total daily TWAS flow- was treated with 2 units 5kW-ULTRAWAVES US, operating 14 hours per day
Current Cetrum WWTP Sludge Flow Sheet
Results
- Biogas production: 28% increased biogas production
- Volantile solid degradation: Volatile solids concentration (as % of DS) was reduced from 70% to 65%
Volatile Solids Concentrations in Digested Sludge
Biogasproduction of Anaerobic Digester Jan – May ‘09
Full-scale Installation
In July 2009 the ULTRAWAVES ultrasonic reactor was implemented on Centrum WWTP. And since is in operation 14 hours per day.
Installed ultrasonic reactor