1. Replacement of fresh water use by final effluent recovery in a highly optimized 100% recovered paper mill
- Author
-
Ruth Ordóñez, Angeles Blanco, Daphne Hermosilla, and I. San Pío
- Subjects
Paper ,Engineering ,Environmental Engineering ,Industrial Waste ,Fresh Water ,Pilot Projects ,02 engineering and technology ,010501 environmental sciences ,Waste Disposal, Fluid ,01 natural sciences ,complex mixtures ,12. Responsible consumption ,Química industrial ,Reverse osmosis ,Effluent ,0105 earth and related environmental sciences ,Water Science and Technology ,Waste management ,business.industry ,Water Pollution ,digestive, oral, and skin physiology ,Paper mill ,Ingeniería química ,Agua ,021001 nanoscience & nanotechnology ,6. Clean water ,Industria del papel ,Wastewater ,Medio ambiente ,Sewage treatment ,Water treatment ,Water quality ,0210 nano-technology ,business ,Water use - 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.
- Published
- 2010