JASS - a Java based Activated Sludge process Simulator, Department of Systems and Control, Uppsala University

Welcome to the NEW JASS!-- a Java based Activated Sludge process Simulator

The old JASS page can be found here.

From this page you can reach our activated sludge process simulator constructed for network usage. The simulator is implemented with 10 zones using the IWA Activated Sludge Model No.1 (ASM1) and a 10 layers settler model. It is possible to simulate pre- and post denitrification systems as well as some step feed strategies. Two other simulators are also available: A simulator for simple bioreactors and a simulator for some basic automatic control strategies. In order to run the simulators you need to have Java Plugin enabled. For security reasons, unsigned apps (like JASS), are blocked by default. In order to run JASS you may therefor add the web address of the JASS homepage to the exception list in the Java Security Control Panel.

Some years ago the JASS simulator was extended to also simulate Biological Phosphorus (BioP) removal. The BioP process is simulated using ASM2d. We want to thank Ulf Jeppsson and Krist Gernaey for providing the differential equations used in the BioP simulator. The implementation has been done by a former student, Gustav Grusell. The economic support provided by Svenska Kommuner och Landsting is gratefully acknowledged.

SIMULATOR REMARKS

JASSeng A simulator for activated sludge processes with nitrogen removal

JASSswe Swedish version

Bioreactors A simulator for simple bioreactors

Reglab A simulator for some basic automatic control strategies

From time to time, we do special versions of JASS for specific wastewater treatment plants. If you are interested in simulating your plant, please contact Bengt Carlsson: bengt.carlsson@it.uu.se.

If you have comments or ideas how to improve the simulator, you may also use the email address above.

Interesting links and JASS related material to download or view (pdf-format, Acrobate Reader 3.0 is needed):
    Manual
    Example of lab instructions for the simulator Bioreactors
    Example of lab instructions for JASS
    Master thesis describing JASS in detail
    Link to our research in wastewater treatment
    Link to our course in Wastewater treatment

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Department of Information Technology, Uppsala University | URL http://www.it.uu.se
Last updated: 2016-01-25

SIMULATOR	REMARKS
JASSeng	A simulator for activated sludge processes with nitrogen removal
JASSswe	Swedish version
Bioreactors	A simulator for simple bioreactors
Reglab	A simulator for some basic automatic control strategies