Industrial Tour and field visit in mobarokgonj

1. Course No: CHEM-3210
Presented By
Sagar Kumar Dutta
Student ID-111815
Chemistry Discipline
Khulna University
Khulna-9208
WELCOME TO MY
PRESENTATION
Industrial Tour and field Visit
In Mobarakgonj sugar mills LTD.

2. Course Teacher
Prof.Dr.Hosna Ara
Head of Chemistry Discipline
And
Kaykobad Md.Rezaul Karim
Assistant Professor
Chemistry Discipline

3. A field visit at………
• Mobarakgonj sugar Mill

4. Company profile
 Name of the industry: Mobarakgonj sugar mills
LTD
 Location : Noldanga , Kaligonj , Jhenaidah
 Year of establishment: 1964
 Major product: Plantation white sugar.
 Production capacity: 15000 M.T
 Total area of the mills: 207.72 Acres

5. Introduction
 What is sugar?
What we call sugar, the chemist knows as
'sucrose', one of the family of sugars otherwise known as
saccharides in the grouping called carbohydrates.
 Sucrose, C12H22O11, is a disaccharide, a condensation
molecule made up of two glucose molecules.
 The process whereby plants make sugars is
photosynthesis.
12 CO2 + 11 H2 O = C12 H22 O11 + 12 O2
carbon dioxide + water = sucrose + oxygen

6. Manufacture of sugar from
sugarcane
 Raw material ,composition, source
 What is Sugarcane?
Sugarcane is member of the grass family. It has a
bamboo like Stalk, grows to a height of from 8 to 15ft, and contains
11 to 15% sucrose by weight.
Sources: E-39,31,32
types cane are collected for prepare the sugar.
Sugarcane ContainsWater
70-
75%
Crystallin
e sugar
10-15%
Reducin
g
Sugar
0.5-
1.0%
Fiber
10-18%
Ash
1%
Organic
acids
1%

7. Plantation white sugar process flow
chart

8. The sugar process is
divided
1 Entry or transportation of the sugar
cane
2 Milling
3 Clarification
4 Evaporation
5 Crystallization
6 Separation
7 Refining
8 Drying
9 Storage

9. Entry or transportation of the
sugar cane
• Sugar is obtained from the cane at mills
located near centers of production.

10. Production Process
Cane yard: is a place where the sugarcane
containing vehicles and gathered. After cutting all
the sugar cane sugar cane weight is measured.
Feed Table: All the cane is emptied on a table
which is called feed table.
Cane cutter: There are two sets of cane cutter,
rotate continuously , each set of cutter contains 30
pcs of knives which completely cut the cane to
small pieces. The cutting sugar is carried out to
milling unit.

11. Milling Train
 The shredded cane is fed through a series of
crushing mills to extract the sugar rich juice,
which is then pumped away for further
processing. The remaining fiber is called
bagasse. The milling units are consist of 5 units
for maximum extraction of juice. The milling
tandem extract juice about 92% from sugar cane.

12. Milling units contain ….
Feed
roller
Top
Roller
Discharge
Roller
Screen Juice: Screened juice is that juice which is collected first milling
unit. This juice contains some bagasse which is resend to the milling chamber and
the clear juice is send to the juice weighing scale.
Juice weighing scale: Here the hole juice
is collected and weighed and the weight is pointed out

13. Production Process
The raw juice tanks consist of two
tanks. The first tank is called weight
tank. It contains about capacity 2.2
tons of raw juice. Firstly , the mixing
juice from the second milling tandem
is carried out to the weighing tank.
When the weighing tank is fulfilled
with its capacity of about 2.2 MT , it
automatically passed into second
There are four boiler in boiler station in su
production unit. Boiler is used to produce
for power generation and other heating pu
Here ,bagasse is used as fuel in boiler.

14. Boiler station
Power
Generatio
n turbine
• The steam from boiler is used to move
turbine in power generator for producing
electricity.
• The steam is also used to milling turbine.
Primary
Heater
• In primary juice heated the juice is heated at 75℃.
• In juice is passed from the bottom of the tank. In this
tank the pH of juice remain 5.0-5.4
Secondary
Heater
• In secondary heater the temperature is raised to (102 − 105℃)

15.  Juice Sulphitation tank: This part is called the “heart of sugar
mill”. These are used to lower the pH of the juice and make it neutral(pH
7.0) . This tank is also called reaction tank.
 In juice sulphitation tank, calcium hydroxide and sulpher dioxide gas
used for clarification of juice.
 SO2 gas forms by burning sulpher and lime from CaCO3
 S+O2 SO2
 CaCO3 CaO+CO2
 CaO+H2O Ca(OH)2
 Ca(OH)2+sucrose Ca-Saccharate+H2O
 Ca-Saccharate+ SO2 Sucrose + CaSO4
Sulphitation tank
Lime

16. Dorr/Clarifier
Upper portion
Clear juice
Down portion
Muddy juice
Mud mixing tank
RVF (Rotatory vacuum Filter

17. RVF is a machine which contains a rotator drum.
Here muddy juice is rotated and mud type materials
Are separated. The clear juice is thus filtrated and
Passed to the raw juice tank by pipeline. The mud
Type materials are called FILTER CAKE
Clear juice pH Testing with
Litmus paper
• If litmus paper is
become
it means that lime
contain large
• If litmus paper is
normal
it means that the sulpher
and lime contain equal.
• If it become black it
means that sulpher
contain large.

18. Multiple Effect Evaporators
• Multiple effect evaporators cons
4 set of evaporators. Firstly, the raw
Juice is passed into the 1st evapora
.then the juice goes through upto th
4th evaporator sequentially to raise
the density of the clear juice. It is
evaporated 75 to 80% water.
• In the first stage of evaporation t
Clarified juice is 12-15 brix,
is concentrated to 60 brix.
• Brix: The brix scale is a densities scale for sugar solution.
• Co-efficient of super saturation=
𝐀𝐦𝐨𝐮𝐧𝐭 𝐨𝐟 𝐬𝐮𝐠𝐚𝐫 𝐢𝐧 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧 𝐚 𝐩𝐚𝐫𝐭𝐢𝐜𝐮𝐥𝐚𝐫 𝐭𝐞𝐦𝐩𝐞𝐫𝐚𝐭𝐮𝐫𝐞
𝐓𝐡𝐞𝐨𝐫𝐢𝐭𝐢𝐜𝐚𝐥 𝐬𝐨𝐥𝐮𝐛𝐢𝐥𝐢𝐭𝐲 𝐚𝐭 𝐭𝐡𝐚𝐭 𝐭𝐞𝐦𝐩𝐞𝐫𝐚𝐭𝐮𝐫𝐞

19. Syrup is prepare ( Brix 50-60)
Reserved tank Again sulphitation is occur in this tank
Vacuum pan
• Syrupy brix 70-80
• In this step light crystal is prepare and which is
examine
by the worker.
Crystallizer (Massecuite)
Centrifugal Machine
Massecuite – A ( final sugar) Pan-A
Massecuite – B ( seed) Pan-B
Massecuite – C (Syrup contain sugar)
Pan-C

20. It is also an open type large vessel. It’s
capacity same as strike receiver. Here the
crystal goes to the stable position and
grows once again slightly.
There are three types of centrifugal machine
A, B and C types. Centrifugal machine are
batch types and C is are continuous.
Centrifugal machine are used to separate the
sugar from the molasses. After centrifugation
5 types
of molasses are obtained. They are
A-light molasses, A-heavy molasses,
B-light molasses, B-heavy molasses
and final molasses. A and B sugar
used is stored as commercial sugar,
C-sugar used as seed.

21. At this stage , the crystalline A and B sugar from centrifugal machine is transferred into the
hopper.

22. At first sugar containing syrup goes to the B chamber where
seed is mixed with syrup and last the syrup goes to the
chamber A and final sugar is prepared.

23. Laboratory
• In the sugar industry a chemistry
Laboratory is contain for determinatio
the presentence of Brix
• Seed are also prepared for crystal
Bagasse
Filter Cake
Molasses

25. Thanks
to all