Maybe this will help you https://discuss.tryton.org/t/install-sao-in-a-production-environment/ Even it talks about a production environment, you can follow it to get a test system running.
Other interesting:
https://discuss.tryton.org/t/install-tryton-in-a-python-virtual-environment-on-ubuntu
https://discuss.tryton.org/t/deploying-tryton-with-a-python-virtual-environment