To preserve a batch of beans for an extended period in the refrigerator, you need to cook a whole bunch at one time by using a pressure cooker. After it is done, re-bag it in small plastic bag that is good for a one-cook meal or portioned it out for easy future use. Then, use a straw to vacuum the air inside the bag before you finally seal the bag. Lastly, freeze it all and arrange it properly in the fridge, you can also label the bags by indicating what type of bean you have and add a date to indicate the day you prepare it.