Often the first place to look when developing a food preservation process is university tested methods for home canners.
Many approved canning, freezing, and drying processors for safe food production.
The "USDA Complete Guide to Home Canning" contains preparation and heat processing methods that have been scientifically determined to be safe.
The Cooperative Extension system has been publishing safe home food preservation recommendations since 1909. In the nearly 100 years, we have come a long way in making home food preservation exceptionally safe.