title: Dust suppression in swine feed using soybean oil.
abstract: Dust generation from swine feed (corn-soybean meal diet) treated with soybean oil was investigated using a cement mixer in a plywood box. Airborne total dust concentrations in the box were measured gravimetrically using a vacuum pump and filters while 12-kg feed samples were constantly mixed. The treatment factors were soybean oil concentration (0, 1, and 3%), corn bulk density (normal, 730 kg/m3 and low, 600 kg/m3), time of oil addition (before vs after grinding the corn), and storage time (0, 7, and 14 d). The feed was a mixture of soybean meal, base mix, and adjusted amounts of ground corn and soybean oil. Adding soybean oil after grinding at 1 and 3% levels to feed made with normal-bulk density corn suppressed total dust generation (3.39 and .99 mg/m3, respectively) (P < .001) compared with the no oil treatment (29.1 mg/m3). The 3% soybean oil treatment suppressed dust generation (.99 mg/m3) more than the 1% soybean oil treatment (3.39 mg/m3) (P < .001). Adding soybean oil after grinding the corn suppressed dust generation more than adding the oil to the corn before grinding for every oil level (P < .001). More dust was generated by feed made from low-bulk density corn than by feed made with normal-bulk density corn at every oil level (P < .001). There was no evidence of any storage time or treatment x storage time interactions.
authors.affiliation: Department of Agricultural Engineering University of Minnesota, St. Paul 55108, USA.
authors.forename: K O
authors.initials: KO
authors.lastname: Mankell
authors.forename: K A
authors.initials: KA
authors.lastname: Janni
authors.forename: R D
authors.initials: RD
authors.lastname: Walker
authors.forename: M E
authors.initials: ME
authors.lastname: Wilson
authors.forename: J E
authors.initials: JE
authors.lastname: Pettigrew
authors.forename: L D
authors.initials: LD
authors.lastname: Jacobson
authors.forename: W F
authors.initials: WF
authors.lastname: Wilcke
mesh_terms: D000821:Animal Feed / Q000032:analysis / Q000592:standards*; D000818:Animals; D004391:Dust; D005524:Food Technology / Q000379:methods; D013024:Soybean Oil / Q000032:analysis / Q000592:standards*; D013025:Glycine max / Q000592:standards; D013552:Swine / Q000502:physiology*; D013997:Time Factors; D003313:Zea mays / Q000592:standards
chemical_list: D004391:Dust; D013024:Soybean Oil