Impacts of operating conditions on nanofiltration of secondary-treated two-phase olive mill wastewater
作者： Javier Miguel Ochando Pulido , Antonio Martínez Férez
DOI: 10.1016/J.JENVMAN.2015.07.014
关键词: Sewage treatment 、 Industrial wastewater treatment 、 Membrane technology 、 Nanofiltration 、 Reverse osmosis 、 Membrane 、 Fouling 、 Environmental science 、 Environmental engineering 、 Wastewater
摘要: Abstract In the present paper, a thin-film composite polymeric nanofiltration (NF) membrane is examined for tertiary treatment of secondary-treated two-phase olive mill wastewater, in substitution reverse osmosis used previous work by Authors. Overcoming deleterious fouling phenomena persistently encountered processes managing wastewater streams was indeed pursued. Setting adequate parameters operating variables – that is, at ambient temperature upon net pressure equal to 13 bar ( P c ), tangential crossflow order 2.55 m s −1 attain enough turbulence over membrane, and above point zero charge (pH > 5.8) ensured high steady-state permeate productivity (59.6 L h m −2 also economically sustainable time owed minimization fouling-build up rate (0.91 h ). Moreover, these conditions provided feed recovery (90%) significant rejection efficiencies electroconductivity (58.1%) organic matter (76.1%). This led purified stream exiting NF operation exhibiting average EC COD values 1.4 mS cm 45 mg L . permits complying with water quality established different regulations discharge public waterways irrigation purposes.
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