Caustic-induced gelation of whey deposits in the alkali cleaning of membranes Export

@article{citeulike:6060355, abstract = {In the literature, it has been observed that in the cleaning of whey-fouled membranes, the flux recovery can decrease dramatically when using high pH and temperature when the permeate side is kept open. The only hypothesis presented so far states that the in-pore deposits swell in contact with aqueous NaOH, narrowing the membrane pores and hence, reducing the filtration flux. This hypothesis does not explain why the swollen deposits are not dissolved at high pH. In this paper, it is proposed that whey deposits are transformed into gels resulting from contacting NaOH. The gelling process increases significantly the resistance of the deposits to alkali. The kinetics of the caustic-induced gelation of whey protein concentrate solutions was found to verify that this gelling process could occur in similar conditions of pH and temperature as those used in the cleaning operations. The formation of a gel layer in a whey solution in contact with an alkaline solution was also investigated.}, author = {Mercad\'{e}-Prieto, Ruben and Chen, Xiao D.}, citeulike-article-id = {6060355}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.memsci.2004.12.038}, citeulike-linkout-1 = {http://linkinghub.elsevier.com/retrieve/pii/S037673880500058X}, day = {01}, doi = {10.1016/j.memsci.2004.12.038}, issn = {03767388}, journal = {Journal of Membrane Science}, keywords = {alkali, coagulation, protein, whey}, month = {June}, number = {1-2}, pages = {157--167}, posted-at = {2009-11-03 14:27:38}, priority = {2}, title = {Caustic-induced gelation of whey deposits in the alkali cleaning of membranes}, url = {http://dx.doi.org/10.1016/j.memsci.2004.12.038}, volume = {254}, year = {2005} }

TY - JOUR ID - citeulike:6060355 L3 - citeulike-article-id:6060355 N2 - In the literature, it has been observed that in the cleaning of whey-fouled membranes, the flux recovery can decrease dramatically when using high pH and temperature when the permeate side is kept open. The only hypothesis presented so far states that the in-pore deposits swell in contact with aqueous NaOH, narrowing the membrane pores and hence, reducing the filtration flux. This hypothesis does not explain why the swollen deposits are not dissolved at high pH. In this paper, it is proposed that whey deposits are transformed into gels resulting from contacting NaOH. The gelling process increases significantly the resistance of the deposits to alkali. The kinetics of the caustic-induced gelation of whey protein concentrate solutions was found to verify that this gelling process could occur in similar conditions of pH and temperature as those used in the cleaning operations. The formation of a gel layer in a whey solution in contact with an alkaline solution was also investigated. IS - 1-2 JF - Journal of Membrane Science SN - 03767388 EP - 167 TI - Caustic-induced gelation of whey deposits in the alkali cleaning of membranes VL - 254 SP - 157 KW - alkali KW - coagulation KW - protein KW - whey AU - Mercadé-Prieto, Ruben AU - Chen, Xiao PY - 2005/06/01/ UR - http://dx.doi.org/10.1016/j.memsci.2004.12.038 ER -