Nanofiltration of Cleaning-in-Place (CIP) wastewater in a detergent plant: Effects of pH, temperature and transmembrane pressure on flux behavior

Membrane technology for the recovery of detergent compounds: A review

“…Kaya et al [25] used a two-step nanofiltration process to recover the product and recycle water from a model CIP wastewater containing anionic and nonionic surfactants from a liquid dishwasher production plant. The experiments were carried out at lab-scale using a plate and frame module and organic membranes with MWCO of 400 and 1000 Da.…”

Membrane Separation Process in Wastewater Treatment of Food Industry

“…If surfactants are below their critical micelle concentration (CMC) they will not be retained by any of these techniques, but if they are above CMC, MF and UF techniques retain these components and the permeate stream will lose its cleaning properties. Some works based on NF processes with the aim of surfactants recovery in the permeate stream have been published in the last years (Boussu et al, 2007, Forstmeier et al, 2002Kaya et al, 2006Kaya et al, , 2009. In those cases permeate flux and surfactant rejection are strongly dependent on the membrane material (membrane isoelectric point -IEP) and feed conditions (pH, concentration, etc.)…”

Nanofiltration regeneration of contaminated single-phase detergents used in the dairy industry

“…Therefore, at the pH values considered in this work they have a weak negative surface charge. A few authors (Cornelis et al, 2005;Boussu et al, 2007;Kaya et al, 2006Kaya et al, , 2009 investigated the nanofiltration of solutions containing surfactants and they concluded that permeability is strongly influenced by the membrane material and the feed conditions (pH, concentration, etc.). The best results in terms of permeability were obtained with hydrophilic membranes.…”

“…There are also a few works where membrane technology has been used to recover surfactants or surfactant-based detergents (Forstmeier et al, 2003;Boussu et al, 2007;Kaya et al, 2006;Kaya et al, 2009). Nanofiltration has been successfully used for this purpose.…”