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Replacement of fresh water use by final effluent recovery in a highly optimized 100% recovered paper mill

Ordóñez Sanz, Ruth and Hermosilla Redondo, Daphne and San Pío Tendero, Ignacio and Blanco Suárez, Ángeles (2010) Replacement of fresh water use by final effluent recovery in a highly optimized 100% recovered paper mill. Water Science & Technology, 62 (7). pp. 1694-1703. ISSN 0273-1223

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Abstract

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.


Item Type:Article
Additional Information:

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.

Uncontrolled Keywords:Advanced treatments, Biological treatments, Closure of water circuits, Membrane treatments, Pulp and paper industry, Reuse of effluents
Subjects:Sciences > Chemistry > Water
Sciences > Chemistry > Chemical engineering
Sciences > Chemistry > Environmental conditions
Sciences > Chemistry > Chemistry, Technical
Sciences > Chemistry > Paper industry
ID Code:11885
Deposited On:25 Jan 2011 10:52
Last Modified:20 Nov 2014 11:17

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