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

Selecting ultrafiltration and nanofiltration membranes to concentrate anthocyanins from roselle extract (Hibiscus sabdariffa L.)

“…Another 25% of the NF market corresponds to food and dairy industries, and less than 10% to the chemical industry (Bessarabov & Twardowski, 2002). In the food and dairy industries, both NF and UF are largely used to treat effluents (Atra, Vatai, Bekassy-Molnar, & Balint, 2005;Blocher et al, 2002;Blocher, Britz, Janke, & Chmiel, 2003;Díaz-Reinoso, González-López, Moure, Domínguez, & Parajó, 2010;Fernández, Riera, Álvarez, & Álvarez, 2010;Iaquinta, Stoller, & Merli, 2009;Kemal Erdem, 2005). Applications for the fruit juice and wine industries have recently begun growing in importance (Banvolgyi, Kiss, Bekassy-Molnar, & Vatai, 2006;Cassano, Conidi, Timpone, D'Avella, & Drioli, 2007;Cassano, Donato, & Drioli, 2007;Díaz-Reinoso, Moure, Domínguez, & Parajó, 2009;Ferrarini, Versari, & Galassi, 2001).…”

Membrane Separation Process in Wastewater Treatment of Food Industry

“…A large amount of acids and alkalis in cleaning and sanitizing steps are used in dairy industry. The consumption of NaOH, HNO 3 and detergents/disinfectants in a dairy industry that processes 1.5 million liters of milk per day is around 3 500, 1 000 and 1 000 kg per day respectively (Fernández et al, 2010). More than 40% of the total pollution caused by a dairy industry comes from their cleaning in place units (Henk, 1993).…”

“…There are a number of works describing how to recover contaminated cleaning solutions by membranes (Choe et al, 2005;Fernández et al, 2010;Gésan-Guiziou et al, 2002Merin et al, 2002;Räsänen et al, 2002). Dresch et al (2001) pointed out the NF technology as a promising technique compared to decantation, centrifugation and microfiltration (0.1µm cut-off) for the regeneration of waste NaOH solutions from an industrial CIP system.…”

“…Recovery of these detergents is not easy because all the components should be permeate through the membrane and to should separate from the rest of foulants, what might be retained. Some authors have been studied the recovery of these detergents by NF processes using a spent single-detergent from a milk company (Fernández et al, 2010). In spite of that NF membrane (200 Da cut-off) maintains constant permeate flux rate (around 45 Lh -1 m -2 ) at 0.9 MPa, 70ºC and 75% recovery rate after 1800 hours running, infrared studies demonstrated that some compounds present in the fresh single phase detergent are partially retained by the membrane.…”

Reuse of Dairy Wastewater Treated by Membrane Bioreactor and Nanofiltration: Technical and Economic Feasibility

“…It is noteworthy that the literature reports several studies focused on the treatment and reuse of evaporator condensate, spent clean in place (CIP) solutions and other product disposal streams of the dairy industry (Trägardh and Johansson, 1998;Dresch et al, 2001;Balannec et al, 2002;Vourch et al, 2008;Fernández et al, 2010;Riera et al, 2013;Wojdalski et al, 2013). However, there are few studies that address the treatment of end-of-pipe wastewater, especially aiming at its reuse in cleaning processes and auxiliary purposes (Sakar et al, 2006;Luo et al, 2011;Andrade et al, 2014).…”