Winemakers use flocculants and other means to bind that kind of impurities. Look in to it - bentonite clay comes to my mind right now.
You want to make the filtering step as easy as possible so use this, let it sit, decant only the clear liquid from top and than use filter on it.
Arcka@midwest.social 1 day ago
Fining might be part of the solution too and is usually easier than filtering. You could try using positive and negative charged finings in turn to see which works better.