Ordóñez Sanz, RuthHermosilla Redondo, María DaphneSan Pío Tendero, IgnacioBlanco Suárez, María Ángeles2023-06-202023-06-202010Ordóñez, 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.2010.933.0273-122310.2166/wst.2010.933https://hdl.handle.net/20.500.14352/41861The 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.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.spajournal articlehttps://doi.org/10.2166/wst.2010.933open accessAdvanced treatmentsBiological treatmentsClosure of water circuitsMembrane treatmentsPulp and paper industryReuse of effluentsAguaIngeniería químicaMedio ambienteQuímica industrialIndustria del papel2303.31 Química del Agua3303 Ingeniería y Tecnología Químicas2391 Química Ambiental3312.13 Tecnología de la Madera