1966-1981 I worked in one receiving/salting station (pickles), four pickle mfg. plants, and two vinegar works, in Wisconsin, Michigan, Wisconsin, and Minnesota. The outdoor wood vats are filled with cucumbers, covered with lagged down wood covers and salt brine. They undergo a controlled fermentation which converts sugars to lactic acid, IIRC, which in turn with the salt brine acts as a preservative. They were conveyed/shipped to a “pickle factory” where they were desalted to about 4% salt by weight, and then “processed” by heating to 140 degrees under air and/or liquid agitation, coloring added at the same time, usually either turmeric or yellow #5. Once cooled, the were ready for packaging as dills, slices, etc., or further processed into sweet pickles or relishes.
Inbound deliveries would include cukes (fresh) or salt stock (cured, per fermentation), bulk or bagged salt, sugar (bagged or liquid by tanker), glass jars or tin cans, closures (lids), vinegar (by tanker), and lots of other misc.
The vinegar plants I worked in (Green Bay and “Nordeast” Mpls), used 190 proof SDA alcohol brought in by tanker. GB vinegar was pumped directly to the adjacent plant, MPLS shipped about 30 miles by tanker. Both were nondescript block buildings about 20’ high, single story, with walkways at the tops of the generators, which were large wood vats. Very little outdoor details, except for bulk alcohol tank, which held about 7000 gallons. Mix was pumped from the bottom of the vats through cooling system to the top of the enclosed vats and distributed evenly down through beechwood shavings in a continuous process. Bacterial ingestion of the alcohol resulted in conversion to acetic acid (vinegar). Batch production could be controlled to specific times, normally drawn off at 11-12% acidity, but not before alcohol content was below 0.4%.
Sorry, got carried away more by process than as an answer to the original question…[zzz] Gary