A STARTUP PROCEDURE FOR PROCESS INDUSTRIES USING A MULTIPLE-OBJECTIVENONLINEAR PROGRAM

We develop a multiple objective nonlinear program to determine optimal set points for the startup period of a continuous mix manufacturing p rocess. We model the objectives and constraints dictated by the proble m formulation and solve the model. We discuss why and how process adju stments are made at the startup of operations. To advance the model, w e develop a startup adjustment methodology. This methodology guides th e process for startup conditions and real-time operation of the system . It is demonstrated on data from a breakfast cereal manufacturing pro cess where the startup process under conventional approaches spans sev eral days. We close the paper with discussions on process adjustments after steady state has been achieved and strategic issues in process r egulation.