Abstract
Ball milling was investigated to increase the yield of soluble dietary fiber (SDF) from bamboo powder. The extraction of SDF from bamboo powder was studied by response surface methodology. The optimal extraction conditions were: pulverization time 4.64 h, temperature 23.3 °C and ball-to-material ratio of 11.31:1 (g/g). Under optimal extraction conditions, the SDF yield was up to 6.03%. In addition, the dietary fiber prepared with superfine pulverizing showed the higher water holding capacity, oil holding capacity, swelling capacity and binding ability of two toxic cations (Pb and Cu) than that of untreated sample. SEM displayed the surface of bamboo powder pretreated by superfine pulverizing was rough and collapsed. Our results confirmed that SDF from bamboo by ball milling had high application potential and could be used as functional components of feed products.
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