When we were at the University Library in Lincoln, Nebraska we were told about a strip of commercial buildings with a commercial printer, a letterpress printer, a hand bindery, a paper mill and a pawnshop - all in a row. We had to take a look. Kevin Oliver runs the Signature Bindery and Christopher James runs Porridge Papers. We neglected to take pictures of the bindery or presses in action (sorry about that) but did get some pictures of the paper mill.
Christopher has two full time employees. They have a beater made by Mark Landers that beats about 30 pounds of recycled fiber at a time. They run three beater loads a day and produce a darn lot of paper with some pretty simple equipment and a lot of hard work.
The beater with a hydro-pulper in the background. The series of PVC pipes allow Christopher to run 30 pounds of pulp thru the pulper in one load.
The beater room has two vats. Here are two views of one of the vats.
The stack dryers are in a separate room with three levels.
Their finished paper is sold for specialty commercial uses like wedding announcements, gift cards, beer coasters, etc.