Cost reduction of the wastewater treatment plant operation by MPC based on modified ASM1 with two-step nitrification/denitrification model

The Activated Sludge Model No. 1 (ASM1) considers that nitrification and denitrification are single step processes and nitrite nitrogen (NO 2–N), which is an intermediate for the two processes, is not accounted for. The first part of this paper presents the development of an enhanced ASM1 with two s...

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Bibliographic Details
Published in:Computers & chemical engineering 2011-11, Vol.35 (11), p.2469-2479
Main Authors: Ostace, George Simion, Cristea, Vasile Mircea, Agachi, Paul Şerban
Format: Article
Language:English
Subjects:
Applied sciences
Benchmarking
Chemical engineering
Computer simulation
Denitrification
Effluents
Exact sciences and technology
Mathematical models
Mechanical engineering. Machine design
MPC
Nitrification
Pollution
Reactive secondary settler
Strategy
Wastewater treatment
Wastewaters
Water treatment and pollution
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Summary:The Activated Sludge Model No. 1 (ASM1) considers that nitrification and denitrification are single step processes and nitrite nitrogen (NO 2–N), which is an intermediate for the two processes, is not accounted for. The first part of this paper presents the development of an enhanced ASM1 with two step nitrification/denitrification processes and its implementation in the Benchmark Simulation Model No.1 wastewater treatment plant (WWTP). The secondary settler was considered to be reactive in order to achieve a better fit between the simulation model and the behavior of the real WWTP. The second part presents the investigation of Model Predictive Control approach for the advanced control of the WWTP. Two control strategies are implemented for the wastewater treatment plant and they are analyzed from the perspective of the benefits brought to the WWTP operation. The proposed control strategy shows a reduction of the operational costs and the improvement of the effluent quality index.
ISSN:0098-1354
1873-4375
DOI:10.1016/j.compchemeng.2011.03.031