PMID- 12092586
OWN - NLM
STAT- MEDLINE
DCOM- 20021217
LR  - 20190922
IS  - 0043-1354 (Print)
IS  - 0043-1354 (Linking)
VI  - 36
IP  - 8
DP  - 2002 Apr
TI  - Improving the nitrogen removal efficiency of an A2/O based WWTP by using an 
      on-line knowledge based expert system.
PG  - 2109-23
AB  - The results obtained using an expert system to control an activated sludge 
      process involving nutrient removal are reported. The study was conducted at a 
      pilot plant using an Anaerobic/Anoxic/Oxic (A2/O) scheme for which a distributed 
      control system was specially developed. The system allows various expert 
      operational approaches to be developed with a view to minimize nitrogen levels in 
      the outlet while using the minimum amount of energy. The proposed distributed 
      control system is supervised by a Knowledge Based Expert System (KBES) 
      constructed with G2 (a tool for expert system development) and permits the 
      on-line implementation of every operating strategy of the experimental system. A 
      set of experiments involving variable loads and flow-rates was carried out. It 
      revealed that the amount of removed nitrogen could be increased by 11% compared 
      to the usual operating conditions. This increase resulted in a decrease in the 
      amount of total nitrogen and ammonium nitrogen in the outlet by 49% and 64%, 
      respectively. These improvements were achieved with little energy cost because 
      the performance of the treatment plant was optimised using operating rules 
      implemented in real time.
FAU - Baeza, J A
AU  - Baeza JA
AD  - Department d'Enginyeria Quimica, ETSE, Universitat Autonoma de Barcelona, 
      Bellaterra, Spain. juanantonio.baeza@uab.es
FAU - Gabriel, D
AU  - Gabriel D
FAU - Lafuente, J
AU  - Lafuente J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Sewage)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - *Artificial Intelligence
MH  - Bacteria, Anaerobic/physiology
MH  - Bioreactors
MH  - Equipment Design
MH  - Nitrogen/*metabolism
MH  - Pilot Projects
MH  - Sewage/*microbiology
MH  - Waste Disposal, Fluid/*methods
EDAT- 2002/07/03 10:00
MHDA- 2002/12/18 04:00
CRDT- 2002/07/03 10:00
PHST- 2002/07/03 10:00 [pubmed]
PHST- 2002/12/18 04:00 [medline]
PHST- 2002/07/03 10:00 [entrez]
AID - S0043-1354(01)00402-X [pii]
AID - 10.1016/s0043-1354(01)00402-x [doi]
PST - ppublish
SO  - Water Res. 2002 Apr;36(8):2109-23. doi: 10.1016/s0043-1354(01)00402-x.