title: Cost-efficient operation of a denitrifying activated sludge process.
abstract: In this paper, the choice of optimal set-points and cost minimizing control strategies for the denitrification process in an activated sludge process are treated. In order to compare different criterion functions, simulations utilizing the COST/IWA simulation benchmark are considered. By means of operational maps the results are visualized. It is found that it is easy to distinguish set-point areas where the process can be said to be efficiently controlled in an economic sense. The characteristics of these set-point areas depend on the chosen effluent nitrate set-point as well as the distribution of the different operating costs. It is also discussed how efficient control strategies may be accomplished.
authors: Department of Electrical Engineering, Dalarna University, SE-781 88 Borlänge, Sweden. psa@du.se
authors: Pär
authors: P
authors: Samuelsson
authors: Björn
authors: B
authors: Halvarsson
authors: Bengt
authors: B
authors: Carlsson
mesh_terms: D028023:Arecaceae / Q000254:growth & development; D003198:Computer Simulation; D003365:Costs and Cost Analysis; D008954:Models, Biological; D009573:Nitrites / Q000737:chemistry / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000191:economics / Q000379:methods; D018508:Water Purification / Q000191:economics / Q000379:methods
chemical_list: D009573:Nitrites; D012722:Sewage; D010758:Phosphorus; D009584:Nitrogen