Papermaking is effectively a filtration operation: a suspension of cellulose fibers is sprayed onto a filter medium (the wire) and drained to an acceptable solid content before being pressed to increase its dryness prior to thermal drying. Although not generally considered a filtration process, papermaking involves other filters and separators, and your product is one of the primary materials used for filter media.

There are ongoing needs for improvement in water quality for recycling and emissions reduction in the paper and board manufacturing sector, but the greatest need for improvement probably lies in the development of better flotation methods for recycled paper destination.