Xavier Flores-Alsina, PhD Process and Systems Engineering Center (PROSYS) DTU Chemical and Biochemical Engineering
Practical applications of wastewater treatment plant modelling studies, particularly industrial cases, have been relatively limited. A potential reason for this is that commercial software applications (e.g. GPS-X, WEST-DHI, SUMO, BIOWIN, EFOR, SIMBA) including state-of-the-art implementations (ASM1, ADM1) were originally developed to predict the performance of urban wastewater systems treating domestic wastewater, and therefore fail to properly represent specific industrial processes. Industrial wastewaters have very diverse dynamics (compared to urban wastewater), which is a result of different production schemes/schedules within the factory. Variable pH, influent biodegradability, non-standard N:COD and P:COD ratios might challenge traditional biological processes. In some cases, high S loads decrease methane/biogas production (and potential energy recovery). Metals and some inorganic/organic compounds can inhibit microorganism growth and/or have severe toxicity effects. The high content of cations and anions promotes the formation of precipitates at different locations in the reactor (granules, pipes), which can have detrimental (decrease of methanogenic activity) or catastrophic (cementation) effects on reactor performance. The seminar will show how some of these (hostile) phenomena may be included within mathematical models describing industrial wastewater as well as several case studies result of the collaboration between DTU Chemical Engineering and the Biotech industry, Water Utilities, Biogas companies within the Scandinavian region.
Xavier Flores-Alsina finished his PhD at the Laboratory of Chemical and Environmental Engineering at the University of Girona (Spain) in 2008. During his studies he did long research-stays in the United Kingdom (Department of Engineering Science, University of Oxford) and Denmark (Department of Chemical and Biochemical Engineering, Technical University of Denmark). He gained post-doctoral experience working in Canada (Department of Water and Civil Engineering, Laval University), Sweden (Department of Industrial Electrical Engineering and Automation, Lund University), Australia (Advanced Water Managament Center, University of Queensland) and South Africa (Department of Civil Engineering, University of Cape Town). The focus of his research is related to: 1) modelling wastewater treatment process (anaerobic digestion, greenhouse gas emissions, separation problems in secondary settlers, fate of micro-pollutants in water bodies, speciation and precipitation of inorganic compounds, biofilm systems, Anammox, Electrochemical cells), 2) process control (nutrient removal and recovery systems, sensor and actuator modelling, fault detection, energy optimization), 3) benchmarking procedures (control strategies, mathematical formulations) and 4) integrated assessment (multi-criteria decision analysis, uncertainty and sensitivity analysis, life cycle analysis).