title: Design of a sequencing batch reactor sequence with an input load partition in a simulation-based experimental environment.
abstract: A study is presented that considers optimization of a sequencing batch reactor (SBR) operational sequence. Optimization is performed with the aid of a laboratory pilot plant and a process model. The model was included in the study to facilitate a search for optimal operating conditions because performing experiments solely on the pilot plant would be rather extensive, expensive, and time-consuming. The model used in the study is the well-known Activated Sludge Model No.1 with minor modifications. The optimization addresses a split-feed operating mode with input load partitioned into two parts and with two successions of aerobic-anoxic phases. In the study, the duration of batch phases and the time of the second input addition are optimized so that the desired effluent nitrogen concentration is achieved and the need for external carbon addition in the anoxic phase is reduced or eliminated. When an optimal SBR sequence computed by the model was verified on the pilot plant, better performance of the actual process was also achieved, although some phenomena were observed that were not predicted by the model. Results of the study indicate that the available wastewater treatment plant models, although a simplification of reality, can be usefully applied for process optimization.
authors.affiliation: Department of Computer Automation and Control, J. Stefan Institute in Ljubljana, Slovenia.
authors.forename: N
authors.initials: N
authors.lastname: Hvala
authors.forename: M
authors.initials: M
authors.lastname: Zec
authors.forename: M
authors.initials: M
authors.lastname: Ros
authors.forename: S
authors.initials: S
authors.lastname: Strmcnik
mesh_terms: D004867:Equipment Design; D008962:Models, Theoretical; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D014876:Water Pollution / Q000517:prevention & control
chemical_list: D012722:Sewage