Material and energy balance

1. MATERIAL AND ENERGY
BALANCE
ABUBAKR AHMAD KHAN

2. •Material quantities as they pass through
food processing operations can be
described as material balances .
•Energy quantities are described by energy
balances .
•Both of these play a vital role in food
processing industry .

3. •Energy balance is used to examine various
stages of a process to make energy
reductions .
•Use of systems and computerss have
made very complex energy and material
balances setup easiy manipulated .
•Basic principle is based on energy or mas
provided in the system is equal to energy
or mass given out plus energy or mass
stored .

4. •This law of conservation leads to the
energy and material balance .
•Energy or mass is conserved in food
processing operations .
•Basis and units of material balance are
required to decide the quantity and inturn
depicts the total meaurement .
•Once the basis is selected then the units
can be known too .

5. •Energy balance is divided into all forms of
energy mainly chemical energy , kinetic
energy , enthalpy etc .
•Energy is interconvertible .
•Energy balances are calculated on the
basis of external energy used per kg of
product or raw material processed .

6. •Both the balace systems can be worked
out quantitatively knowing amount of
materials entering into a process .

8. •Example of material balance
•Skim milk from whole milk .. Skimmed milk
is prepared by removal of fat from whole
milk .