Success stories

Lleida WWTP (Spain)

360º integrated process control for overall enhanced sustainability and robustness

Plant characteristics

Design flow: 87.500 m3/d
Biological treatment:
- 2x stage 1 Bioreactors (AO)
- 4x stage 2 Bardenpho reactors (AOA)
Aeration system:
- 6x turbocompressors:
- 2x shared for stage 1
- 4x shared for stage 2
Effluent discharge consent:
- BOD5 < 25 mgO2/L
- COD < 125 mgO2/L
- TSS < 35 mg/L
- TN < 10 mgN/L
- TP < 1 mgP/L

Challenge

To reduce the energy consumption (aeration, internal and external pumping, SRT) and chemicals (Ferric chloride) costs whilst ensuring the effluent quality
To monitor, optimize and stabilize treatment performance

CREApro® platform fitted with self-customized process intelligence tools and editable control configuration settings : an every day as well as a strategic tool.

Solution implemented

Intelligent control loops included and tailored over 10 years:

AERATION:
N-control and MOV-control modules with:
Dynamic and individual DO setpoint
N/DN cycles management
Tariff strategy
Advanced and predictive automatic valves control
Dynamic pressure control

CHEMICAL DOSING:
P-control module, with dynamic dosing rate setpoint and adjustment to each individual reactor depending on N/DN stage

MIXED LIQUOR MANAGEMENT:
RASi-control module for dynamic internal recirculation pumping
RASe-control module, to maintain stable MLSS in reactors and sludge blanket in clarifiers
SRT-control, to manage WAS flow to reach a defined SRT

Intelligent data analytics tools included and tailored:

INTELLIGENT DATA MANAGEMENT (IDM), with:
Real-time key signals reliability

Soft sensors, using Artificial Intelligence (self-adjusted models by Machine Learning)

KPIs

100%

Effluent quality compliance

22%

Reduction of kWh / kgN removed

20%

Reduction of kgFeCl3 / kgTP removed

42%

Estimate increased bio-P removal rate

Feedback from the user

“Different CREApro control modules implemented over 7 years of WWTP operation proved to be an affordable alternative to the upgrading and optimization of an existing WWTP and to comply with more stringent effluent quality.
We consider Createch360º remote monitoring/assistance service an added safety benefit in process control. The Createch360º team is open minded, innovative and always open to new proposals and development. Each solution is fully customized and adapted to specific WWTP requirements. “

Jordi Palatsi, WWTP Manager Aqualia, Aigües de Lleida

Lleida WWTP (Spain)

Plant characteristics

Challenge

To reduce the energy consumption (aeration, internal and external pumping, SRT) and chemicals (Ferric chloride) costs whilst ensuring the effluent quality

To monitor, optimize and stabilize treatment performance

Solution implemented

KPIs

Feedback from the user

Createch360º

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