In the training manual on the example of solving the problem of designing biochemical wastewater treatment plants, approaches to automation of project work are shown , Development of simulation models of information processes , mathematical methods of modeling information processes and systems , planning simulation experiments with models; formalization and algorithmization of information processes, statistical modeling on PCs, assessment of accuracy and reliability of modeling results, etc. This manual is intended for students of the specialty 071900 "Information Systems and Technologies" in accordance with the state educational standard of higher professional education (the direction of training of a graduate specialist 654700 - "Information Systems") and can be used as additional material in the study of the following disciplines. 'System modeling', 'Information systems design', 'Information systems knowledge representation', etc. It will also be useful to students of specialties 170500 - 'Machines and apparatuses of chemical industries and enterprises of building materials' and 330200 - 'Engineering environmental protection' when studying the discipline ''Industrial ecology equipment''; Master's students under the program 551819 - "Information Systems of Technological Machines"