Filter aids and flocculants help clarify fermentation broth and culture supernatant. Filter aids such as diatomaceous earth, perlite and cellulose form a porous cake in precoat or body-feed use, and flocculants gather fine particles into masses that settle. Buyers compare material, permeability grade, purity for pharmaceutical use, and the charge of the flocculant (anionic, cationic or nonionic) against the liquid being treated. Entries below give the maker of each product and the Japanese subsidiary or distributor to ask.
“Where to buy in Japan” shows only sales relationships we have confirmed on the company’s or the distributor’s own website. “Not yet confirmed” means we have not checked yet, not that the product is unavailable in Japan. Product names link to the maker’s own page.