title: Fouling of a spiral-wound reverse osmosis membrane processing swine wastewater: effect of cleaning procedure on fouling resistance.
abstract: Swine manure is a valuable source of nitrogen, phosphorus and potassium. After solid-liquid separation, the resulting swine wastewater can be concentrated by reverse osmosis (RO) to produce a nitrogen-potassium rich fertilizer. However, swine wastewater has a high fouling potential and an efficient cleaning strategy is required. In this study, a semi-commercial farm scale RO spiral-wound membrane unit was fouled while processing larger volumes of swine wastewater during realistic cyclic operations over a 9-week period. Membrane cleaning was performed daily. Three different cleaning solutions, containing SDS, SDS+EDTA and NaOH were compared. About 99% of the fouling resistance could be removed by rinsing the membrane with water. Flux recoveries (FRs) above 98% were achieved for all the three cleaning solutions after cleaning. No significant differences in FR were found between the cleaning solutions. The NaOH solution thus is a good economical option for cleaning RO spiral-wound membranes fouled with swine wastewater. Soaking the membrane for 3 days in permeate water at the end of each week further improved the FR. Furthermore, a fouling resistance model for predicting the fouling rate, permeate flux decay and cleaning cycle periods based on processing time and swine wastewater conductivity was developed.
authors.affiliation: a Dairy and Swine Research and Development Centre , Agriculture and Agri-Food Canada , Sherbrooke , Canada.|b Department of Chemical Engineering, Biotechnology and Environmental Technology , University of Southern Denmark , Odense M , Denmark.
authors.forename: M S
authors.initials: MS
authors.lastname: Camilleri-Rumbau
authors.affiliation: a Dairy and Swine Research and Development Centre , Agriculture and Agri-Food Canada , Sherbrooke , Canada.
authors.forename: L
authors.initials: L
authors.lastname: Masse
authors.affiliation: a Dairy and Swine Research and Development Centre , Agriculture and Agri-Food Canada , Sherbrooke , Canada.
authors.forename: J
authors.initials: J
authors.lastname: Dubreuil
authors.affiliation: c Food Research and Development Centre , Agriculture and Agri-Food Canada , Saint-Hyacinthe , Canada.
authors.forename: M
authors.initials: M
authors.lastname: Mondor
authors.affiliation: b Department of Chemical Engineering, Biotechnology and Environmental Technology , University of Southern Denmark , Odense M , Denmark.
authors.forename: K V
authors.initials: KV
authors.lastname: Christensen
authors.affiliation: b Department of Chemical Engineering, Biotechnology and Environmental Technology , University of Southern Denmark , Odense M , Denmark.
authors.forename: B
authors.initials: B
authors.lastname: Norddahl
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D057219:Biofouling; D005374:Filtration / Q000295:instrumentation*; D009995:Osmosis; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater
chemical_list: D062065:Wastewater
keywords: Pig manure; fouling resistance; membrane cleaning; membrane soaking; reverse osmosis