Flender/Flender Gear Units/Bevel-helical speed reducer B3
r circulation. The effectiveness may be further increased if thebags are only partially lled because less than 2% of the

lime in 2-kg bag is consumed asa result of the hardening of the outer layer. The amount of lime required

depends on theamount of produce in the storage room, the respiration rate, and the rate of CO 2addition to the

room. Some 2scrubbers produce CO 2as by-product, which must also be removed by the lime. 2-kg bag of lime has

volume of approximately 0.1 m3(, and roughly 1 bags are needed for every 1 tonnes (1 bushels) of fruit, whereas about 4 bagsare needed for 1 tonnes of vegetables (. The hydrated lime and the CO 2react in 1:1 ratio to form limestone (CaCO and water. The lime that is to be used can be agricul- tural or chemical hydrated lime as long as it is fresh, high in calcium, and ne enoughto pass through 1 mesh sieve (. One should choose limes that have less than 2% magnesium hydrate (MgO) since the calcium hydrate (CaO) is more reactive than the MgO (. Hydrated lime with an assay of 7% CaO contains 9% Ca(OH) 2(. It is possible to add lime to the storage room directly, but only if the lime is not responsible for scrubbing all the CO 2. This is most often used during the initial 2pull- down period (. The lime can be placed directly under the evaporator, in front of thedoor, or on top of the stacks, as long as it does not disturb the airow in the room. Someheat is given off during the reaction between CO 2and the lime, so thermostats or thermom- eters should not be placed close to the lime to prevent the room temperature from being biased upward (. Water CO 2scrubbers use the inside to outside differential pressures of CO 2to re- move it from the CA room. brine solution is pumped or sprayed over the evaporatorcoils in the CA room (Fig. . As the brine is exposed to the atmosphere in the CA roomit absorbs CO 2, since the CO 2partial pressure is very low in the incoming water and very high in the atmosphere of the CA