<Ul> <Li> Milling, and </Li> <Li> Diffusion . </Li> </Ul> <Li> Milling, and </Li> <P> Juice extraction by milling is the process of squeezing the juice from the cane under a set mills using high pressure between heavy iron rollers . Those mills can have from 3 up to 6 rolls; every set of mills are called tandem mill or mill train . For improve the milling extraction efficiency, imbibition water is added at each mill: Hot water is poured over the cane just before it enters the last mill in the milling train and is recirculated up to the reach the first mill . The juice squeezed from this cane is low in sugar concentration and is pumped to the preceding mill and poured onto the cane just before it enters the rollers, the juice from this mill is the same way pumped back up the milling train . Mixed juice (that is to say cane juice mixed with the water introduced at the last mill) is withdrawn from the first and second mills and is sent for further processing . Milling trains typically have four, five or six mills in the tandem . For improve the milling extraction performance before the cane reach the first mill, normally are used knife and shredder as preparation equipments . </P> <P> Sugarcane diffusion is the process of extracting the sucrose from the cane with the use of imbibtion but without the squeezing by mills . Shredded cane is introduced into the diffuser at the feed end, Hot water is poured over the shredded cane just before the discharge end of the diffuser . The hot water percolates through the bed of cane and removes sucrose from the cane . This dilute juice is then collected in a compartment under the bed of cane and is pumped to a point a little closer to the feed end of the diffuser and this dilute juice is allowed to percolate through the bed of cane . At this point the concentration of sucrose in the cane is higher than the concentration of sucrose in the dilute juice just mentioned and so sucrose diffuses from the cane to the juice, this now slightly richer juice is pumped back up the diffuser and the process is repeated, typically, 12 to 15 times (compared with the four to six times for the milling process) </P>

Where is the fourth sugar mill was setup