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1、Major：ChemicaltechnologyCassavastarchandit’sapplicationCassava,isalsocalledmaniocoryucca.Theplantgrowsinabushyform,upto2.4m(8ft)tall,withgreenish-yellowflowers.Therootsareupto8cm(3in)thickand91cm(36in)long.Therootscontainfrom20to32%ofstarchatmaturity.Earlymaturingcultivarsarereadyforh
2、arvestafter8-12month.AboutcassavaTwovarietiesofthecassavaareofeconomicvalue:thebitter,orpoisonous;andthesweet,ornon-poisonous.Thetoxinincassavaiscalled"linamarin".ItischemicallysimilartosugarbutwithaCNionattached.Justafewpiecesofcassavarootscontainafataldoseofpoison.DryingSettlingorde
3、wateringCassavastarchPeelingFiltering/screeingWashingCassavarootMixingwithwaterStarchwashingSettingGrating/raspingMillingSimpleprocessforcassavastarchproductionStarchisoneofthemostabundantsubstancesinnature,arenewableandalmostunlimitedresource.Cassavastarchisanimportantsourceofenergyf
4、orhumansandanimalsasfood,andhasmanyremarkablecharacteristics,includinghighpasteviscosity,highpasteclarity,andhighfreeze-thawstability,whichareadvantageoustomanyindustriesasarawmaterial,suchaspaper,textiles,adhesives,confectionery,pharmaceuticals,andbuildingmaterials.ApplicationTheroot
5、inpowderformisusedtopreparefarinha,amealusedtomakethincakessometimescalledcassavabread.ThestarchofcassavayieldsaproductcalledBrazilianarrowroot.Asfood1PaperindustryInthepaperandboardindustries,starchisusedinlargequantitiesatthreepointsduringthemanufacturingprocess:Ⅰ.attheendofthewettr
6、eatment,whenthebasiccellulosefiberisbeatentothedesiredpulptoincreasethestrengthofthefinishedpaperandtoimpartbodyandresistancetoscuffingandfolding;Ⅱ.atthesizepress,whenthepapersheethasbeenformedandpartiallydried,starchisusuallyaddedtooneorbothsidesofthepapersheettoimprovethefinish,appe
7、arance,strength,andprintingproperties;Ⅲ.inthecoatingoperation,whenapigmentcoatingisrequiredforpaper,starchactsasacoatingagentandasanadhesive.2TextileindustryInthetextileindustry,starchisusedinthreemainareas:sizing,finishingandprinting.Andapproximately80%ofthestarchusedintextilesisused
8、insiz
