Automatic control of the effluent turbidity from a chemically enhanced primary treatment with microsieving

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For chemically enhanced primary treatment (CEPT) with microsieving, a feedback proportional integral controller combined with a feedforward compensator was used in large pilot scale to control effluent water turbidity to desired set points. The effluent water turbidity from the microsieve was maintained at various set points in the range 12-80 NTU basically independent for a number of studied variations in influent flow rate and influent wastewater compositions. Effluent turbidity was highly correlated with effluent chemical oxygen demand (COD). Thus, for CEPT based on microsieving, controlling the removal of COD was possible. Thereby incoming carbon can be optimally distributed between biological nitrogen removal and anaerobic digestion for biogas production. The presented method is based on common automation and control strategies; therefore fine tuning and optimization for specific requirements are simplified compared to model-based dosing control.


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Externa organisationer
  • Lund University

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Vattenbehandling


Sidor (från-till)1770-1780
Antal sidor11
TidskriftWater Science and Technology
Utgåva nummer7
StatusPublished - 2017 okt 1
Peer review utfördJa