For example, BHP-Billiton's Olympic Dam in South Australia achieved industrial water efficiency improvements of 15%, from 1.27 kilolitres to 1.07 kilolitres per tonne of material milled.
The enzymatic digestibilities of both glucan and xylan were significantly elevated by a prolonged milling time (120 minutes), although the CrI of this material was almost the same as that of the material milled for 20 minutes (Table 1).
However, the material milled for 20 minutes appears showed an insufficient improvement in the enzymatic digestibility, because only 46.8% glucan and 34.3% xylan were hydrolyzed with 40 FPU/g substrate.
However, the supplementation of Optimash BG to the enzyme cocktail caused an increase in xylan digestibility of the material milled for 120 minutes from 54.0% to 72.5% (Table 1).
Previous in vitro work on the same materials had suggested that biological activity was related to fibres greater than 6.5 microns in length and that the material milled for 4 and 8 h did not contain fibres in this range and was biologically inactive.
Furthermore, atmospheric emissions are highly variable due to an internal control mechanism that captures and loops mercury between the high-temperature kiln and low-temperature raw materials mill.
These assumptions are not too restrictive and the solution appears to be a useful approximation for a broad range of material-mill combinations.
The company's technology links a curated selection of textile mills and materials suppliers with clothing manufacturers, brands and designers to ensure the quality and transparency of its supply chain.
The dried material was milled using a knife mill (IKA, 10 MF Basic) to pass through a 1 mm screen.
The developed model allows for a clear separation of the influence of material properties, mill specific features and operating conditions, thus enabling a deeper understanding of the impact grinding process.
The dried material was milled using a Perten laboratory mill 3600 (Perten, UK) and sieved to give samples in the particle size range of 250 425 microns.
