Abstract
Wastepaper is recycled as pulp for the production of papers or boards. The pulp containing secondary fibers needs to be purified in a deinking installation. A total closed water system is developed for water reclamation in deinking installations. The pulp with inks is first processed with an induced (dispersed) air flotation (IAF) cell and then a washing unit (stock washer). The wastewater is clarified by a dissolved air flotation (DAF) cell for water reclamation. A fractionator (spray filter) is additionally used for the recovery of long fibers from washing water. The sludge is thickened on a thickener (twin wire press). The water reclamation and deinking systems are highly efficient and cost-effective. Special emphasis is placed on the design of individual treatment units and the entire deinking/reclamation system. Several case histories are introduced.
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Shammas, N.K., Wang, L.K., Selke, W.A. (2010). Completely Closed Water Systems in Paper Mills. In: Wang, L., Shammas, N., Selke, W., Aulenbach, D. (eds) Flotation Technology. Handbook of Environmental Engineering, vol 12. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-60327-133-2_12
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DOI: https://doi.org/10.1007/978-1-60327-133-2_12
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