there should be off-the-shelf solutions at almost any scale from the beer & or wine industries. Delta Separations uses a filter unit sourced from the wine industry. I’m not the only one who considers it a miss.
@Lilibel’s solution looks great up to a certain scale…if you’re looking at 50gal drums, it might be on the small side. Probably makes sense to ask 
removing more from your title and just searching for “filter” brings up a couple of other hits around here you should probably be aware of: Search results for 'filter' - Future4200 but you’ve already been there right?