RT Journal Article T1 Replacement of fresh water use by final effluent recovery in a highly optimized 100% recovered paper mill A1 Ordóñez Sanz, Ruth A1 Hermosilla Redondo, María Daphne A1 San Pío Tendero, Ignacio A1 Blanco Suárez, María Ángeles AB A further closure of the water circuit in paper mills with a relative high optimization of their water network is limited by the increase of contamination in the water and runnability problems of the paper machine. Therefore, new strategies for saving water must be focussed on the treatment of final effluents of the paper mill, aiming to obtain high quality water that may replace fresh water use in some applications. An appropriate treatment train performed at pilot scale,consisting on a previous clarification stage followed by anaerobic and aerobic treatments,ultrafiltration, and reverse osmosis, made possible producing the highest water quality from the final effluent of the mill. Anaerobic pre-treatment showed very good performance assisting the aerobic stage on removing organics and sulphates, besides it produced enough biogas for being considered as cost-effective. Permeate recovery depended on the silica content of the paper mill effluent, and it was limited to a 50–60%. The reject of the membranes fully met the legislation requirements imposed to effluents arriving to municipal wastewater treatment plants. PB IWA Publishing SN 0273-1223 YR 2010 FD 2010 LK https://hdl.handle.net/20.500.14352/41861 UL https://hdl.handle.net/20.500.14352/41861 LA spa NO Ordóñez, R., et al. «Replacement of Fresh Water Use by Final Effluent Recovery in a Highly Optimized 100% Recovered Paper Mill». Water Science and Technology, vol. 62, n.o 7, octubre de 2010, pp. 1694-703. DOI.org (Crossref), https://doi.org/10.2166/wst.2010.933. NO The definitive peer-reviewed and edited version of this article is published in Water Science & Technology, vol. 62, nº 7, pp. 1694-1223, 2011, doi: 10.2166/wst.2010.933 and is available at www.iwapublishing.com. NO European Commission NO Comunidad de Madrid NO Ministerio de Ciencia e Innovación (España) DS Docta Complutense RD 22 mar 2026