watertap.examples.flowsheets.case_studies.activated_sludge package
Submodules
watertap.examples.flowsheets.case_studies.activated_sludge.ASM1_flowsheet module
Example of activated sludge process model based on BSM1 study using ASM1 reactions. This process contains 2 anoxic tanks followed by 3 aerobic tanks and a clarifier with recycle streams.
Unit operations are modeled as follows:
Anoxic reactors as standard CSTRs (CSTR)
Aerobic reactors as CSTRs with additional injection terms (CSTR_Injection)
Clarifier as a Separator with split fractions by components
Note that a pressure changer is required in the recycle stream to ensure the pressure inside the recycle loop is bounded. As the inlet Mixer uses a pressure minimization constraint and there is no pressure drop in the reactors, if pressure is not specified at some point within the recycle loop then it becomes unbounded.
Based on example from:
[1] J. Alex, L. Benedetti, J. Copp, K.V. Gernaey, U. Jeppsson, I. Nopens, M.N. Pons, J.P. Steyer and P. Vanrolleghem, “Benchmark Simulation Model no. 1 (BSM1)”, 2018
watertap.examples.flowsheets.case_studies.activated_sludge.ASM2D_flowsheet module
Based on flowsheet from:
Flores-Alsina X., Gernaey K.V. and Jeppsson, U. “Benchmarking biological nutrient removal in wastewater treatment plants: influence of mathematical model assumptions”, 2012, Wat. Sci. Tech., Vol. 65 No. 8, pp. 1496-1505