Smurfit Westrock Belgrade, Serbia
Smurfit Westrock Belgrade, Serbia
The investor’s main activity is the processing and production of packaging material. The WWTP was reconstructed to meet discharge limits into the Danube River in accordance with legislative requirements. In the past, there was just flotation unit and sedimentation tank. Hydrotech and its client decided to expand the system by adding aerobic and anaerobic treatment stages, including an IC (Internal Circulation) reactor. Excess aerobic sludge is continuously removed and reused as a material in packaging production.
Another by-product is biogas, produced in the anaerobic reactor, which has significant energy potential. The average biogas production is 4 100 m³ per day (approx. 117 GJ/d).
Inlet
COD
BOD5
Design parameters
30 kg/ton
4 000 mg/l
Operational phase
27 kg/ton
3 730 mg/l
Outlet
COD
BOD5
Legislative requirements
5 kg/ton
25 mg/l
Operational phase
1 kg/ton
95 mg/l
Efficiency
COD
BOD5
Legislative requirements
83,3 %
99,4 %
Operational phase
95,7 %
97,5 %
Parameters
Project
Capacity
266 670 PE
4 000 m3/d
Type of wastewater
Industrial / Paper mill
Technology
Mechanical pretreatment: Dissolved air flotation unit, pumping station
Anaerobic treatment: IC reactor, buffer tank, biogas handling part, cyclone
Aerobic treatment: Aeration tanks, sedimentation tank
References
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