Presentation on theme: "Welcome to CTCRI Produce tuber and reduce hunger."— Presentation transcript:
Welcome to CTCRI Produce tuber and reduce hunger
Application of Tuber Starches in Industry S. N. Moorthy Central Tuber Crops Research Institute Thiruvananthapuram, Kerala
CTCRI carries out research on various aspects of Tropical Tuber Crops CassavaSweet potato ColocasiaDioscorea esculenta D. alataD. rotundata AmorphophallusXanthosoma ArrowrootPachyrrhizus Coleus Canna edulis
Improved cassava varieties released from CTCRI Name of the Variety Yield (t ha -1 ) Potential Yield (t ha -1 ) Starch (%) Edible (E) Industrial (I) a. H I b. H I c. H I d. Sree Visakham E e. Sree Sahya E f. Sree Prakash E/I g. Sree Harsha I h. Sree Jaya E/I i. Sree Vijaya E j. Sree Rekha E k. Sree Prabha E
Industrial Utilization of Cassava in India ( in lakh tonnes/annum ) Cassava product Current Utilization Projection for 2020 AD Demand by 2020 AD Gap Starch Sago Dry Chips Wafers
Industrial utilization of cassava starch in India Textiles % Adhesives % Food 10 % Pharmaceuticals, Liquid glucose, modified starches 5-10 % Vitamin C, Maltodextrins, Citric acid, Ethanol, Biodegradable plastics etc. 5 %
Tuber crop starch- properties TubersStarch, %ViscosityClarityStability Cassava25-35High Medium Sweet potato Medium- high HighMedium Yams15-33 Medium- high High Aroids10-20 Low- medium LowHigh Canna15-25High Arrowroot16-28 Medium- high Medium
Source Granule Amylose XRD Size ( m) content (%) pattern Cassava A Sweet Potato A Dioscorea alata B D. esculenta B D. rotundata B Colocasia esculenta A Xanthosoma A Amorphophallus A Arrowroot A PROPERTIES OF THE DIFFERENT TUBER STARCHES
POSSIBLE APPLICATIONS OF THE STARCH Cassava Starch In food industry Advantages Bland taste, high viscosity, good clarity and storage stability. Disadvantage Cohesive character in some foods
In textile and paper industry Advantages Brightness, high viscsosity easy gelatinisation & desizing Disadvantages Unstable viscosity, cohesive texture In Sweetener industry Advantages Easy gelatinisation, In Adhesive industry Advantages Good tack. APPLICATIONS OF CASSAVA STARCH
Yam starches Advantages Can be useful in food industry due to high and stable viscosity, clarity and gel stability Can also be useful in other industrial applications Disdvantages Poor starch extractability and starch often discoloured D. esculenta starch can be useful in toilet formulations and aerosols and biodegradable plastics as filler APPLICATIONS OF STARCHES
Colocasia starch In food applications Easily digestible Small granules useful in: Toilet formulations and aerosols Biodegradable plastics as filler * Modifications eliminate undesirable properties Applications of starches
CATEGORIES OF STARCH USE Starch Auxiliary Raw Material Functional Additive Component Active Material Binder, thickener etc. Polyols, Org. acids Synth. Polymers Grafted polymers Surfactants
STARCH MODIFICATIONS Physical Treatment Chemical Treatment Pregelatinised DegradationSubstitutionCrosslinking Diethers Diesters Dextrins Glucose etc. Oxidised Ethers Esters Anionic Cationic Non-ionic
Area ModificationFunctions Paper Cationic starchBinding cationic charge Corrugating PregelatinisedBinding/Glueing/Initial tack / granular starch Textile Starch esters(Acetates) Sizing/ Film formation Gypsum/ mineral Starch esters/ ethers Binding/ Low gelzn. Temp. fibre board Coal briquetting Starch esters Binding Initial Tack Adhesives for Starch esters Adhesion / Quick drying Paper sacks Oil well drilling Starch esters/ ethers Water binding/ Thickening Foundry Pregelatinised starch Binding/ Green Bond stability APPLICATION AREAS FOR MODIFIED STARCHES
Modified Starches Developed at CTCRI 1. Starch with reduced viscosity 2. Starch acetate and other esters 3. Oxidised starch 4. Cold water miscible starch 5. Maltodextrin 6. Starch based adhesive
Starch of reduced viscosity Produced by steam pressure treatment. Viscosity could be modified to desirable levels by changing the pressure and time. Simple process and easy work up.
Starch esters Starch acetate prepared by reaction of acetic anhydride in alkali/pyridine. Desired DS level achieved by varying the anhydride concentration. The properties depend on DS and at high DS, the starch was resistant to gelatinisation. Good film forming capacity.
Oxidised starch Oxidation by use of sodium hypochlorite Lower and stabilised viscosity Simple work up Suitable for paper industries
Cold Water Miscible Starch Using alcohol/alkali & precipitation by alcohol. Easily and completely soluble in cold water Good and stable viscosity
Maltodextrins from cassava starch and thippi Prepared from starch/thippi using thermostable bacterial amylase, Termamyl. Low sweetness, high thickening power and readily miscible in water. Food application as low calorific product, fat substitute, encapsulation of flavours Pharmaceutical applications.
Novel starch based products Polyols like Maltitol, Erythritol Organic acids like Gluconic acid Biodetergents Biodegradable plastics.