STARCH

a wonderful polysaccharide

It is a product of green plants as stored energy.

Common carbohydrate in human diet.

Pure starch powder is white, tasteless and odorless.

Starch

Contained in large amounts in:

Potatoes

Examples

RiceWheatCorn

Cassava

Starch form Middle English word “Sterchen” means “to stiffen”

History

Amylum from Latin “Amylon” which means “not ground a mill”

Identified in Europe dating back 30,000 years back.

In foods: Bread, pancakes, cereals, noodles,

pasta, and porridge.

ApplicationS

In non-food:Papers, adhesives, body powder,

and biofuel.

Starch Industr

y

*Starch slurry is Refined starch

and water

Production of Starch

Slurry

Starch Industry

Shelled and cleaned kernels are placed in

steep tanks and soaked in cold H2O with SO2

for 24-48 hours.

Cleaning

* SO2 is to prevent fermentation and separate starch and protein.

Starch Industry

The kernels are ground. Water is added, creating a macerated slurry.

Wet Grinding

Starch IndustryGluten and starch

is separated by centrifugation.

Gluten is dried and sold as gluten feed.

Centrifugation

*Gluten is a type of protein like found in cereals and grains.

Starch Industry

Starch undergo number of

processes of washing and dewatering.

Dewatering

Production of Starch

Starch Industry

Starch Industry

Starch undergo treatment with

chemicals or enzymes to create variety of modified

starches.

Starch Modification

Starch Industry

Modified starch and unmodified

starches undergo drying to produce

wide variety of starches.

Drying

Some modified starches are:

Acetate

Starch Samples

Phosphate