This document discusses using rice husk as a renewable energy source in Bangladesh. It begins by introducing renewable energy and noting the benefits. It then discusses Bangladesh's energy resources and potential for renewable energy. A major focus is on generating electricity from rice husk, which is a substantial biomass waste product from rice production. The document outlines the process of gasification and electricity generation from rice husk. It provides national and international case studies of existing rice husk power plants. Finally, it discusses the feasibility and challenges of implementing rice husk power generation projects in Bangladesh.

1. Production of renewable
energy from biological
sources

2.  Presented to
Md. Hammadul Haque Shilu
Lecturer
Dept. of GEB.
 Presented by
• Deedarul Hyder Sani (Reg. No. 2014431001)
• Saima Sultana Shetu (Reg. No. 2014431002)
• Md. Abdul Kader (Reg. No. 2014431003)
• Afroza Aktar Sharna (Reg. No. 2014431004)
• Md. Ashikur Rahman Bhuiyan (Reg. No. 2014431006)

3. Contents
1. Renewable energy.
2. Energy resources of Bangladesh.
3. Renewable energy in Bangladesh.
4. Electricity from rice husk.
5. Electricity sectors in Bangladesh.
6. About rice and rice husk.
7. Procedure of electricity generation from rice husk.
8. National and international case study.
9. Feasibility of the process.
10. References.

4. What is renewable
energy?
Energy from a source that is never
depleted when used.

5. Why renewable energy?
• Limited resource of energy
• Less environmental pollution
• Reduced health hazard
• Low cost
• It is RENEWABLE !

6. Energy resources of Bangladesh
Resources Value Unit
Solar potential 380054187 MWh/Year
Coal reserves 322.98 Million short
tons
Natural gas
reserves
195400000000 Cubic Meters (cu
m)
Oil reserves 28000000 Barrels (bbl)

7. HydropowerBiogas
Windsolar

8. ELECTRICITY FROM RICE
HUSK
A POTENTIAL WAY TO ELECTRIFY
RURAL BANGLADESH

9. Electricity sector in
Bangladesh
 Installed electricity generation capacity-20725 MW
(July,2016)
 Per capital energy consumption -321KW
 Daily lacking of power generation -1600 MW

10. Rice and Rice husk
The rice husk or hull is the outermost layer of the paddy grain that is
separated from the rice grains during the milling process.
Husk-20% of the paddy weight.
About 770 million tons of rice husk is produced in Asia annually
Characteristics:
• Average caloric value 3410 Kcal/kg.
• 1 ton of rice paddy 220 kg of rice
husk.
• Easily collectable at a very low cost.

11. Rice Husk – a Huge Biomass Energy Source
9 Million Tons
Power to Empower
Enough to Light 33K Villages

12. Chemical compositions of rice
husk
Property Range
Bulk density (kg/m 96-160
Hardness (Mohr’s scale) 5-6
Ash, % 22-29
Carbon,% 35
Hydrogen,% 4-5
Oxygen,% 31-37
Nitrogen,% 0.23-0.32
Sulphur,% 0.04-0.08
Moisture,% 8-9

13. Availability of rice husk
in Bangladesh
• One hundred thousand of rice mills
• Most of the mills located in
1. Dinajpur (North Bengal)
2. Sherpur ( near bogra)
3.Ishwardi
4. Kaliakoir ( near Dhaka)
• Total rice production in Bangladesh – 34.8 Million tons per year
• Total amount of available husk-9 Million tons per year

14. Electricity generation capacity based on
rice husk availability
Rice processing
zone
Available husk Potential electricity generation
From rice mill
‘000’ ton/year
Boiler plant KW
@ 1.3 kg husk/KWh
Gasification plant
KW
@ 1.86 kg husk/KWh
Dinajpur 82.90 7250 5150
Ishwardi 121.21 10750 7500
Bogra 58.69 5200 3600
Naogaon 192.55 18250 12800
Total 455.35 41450 29050

15. Procedure of electricity generation from
rice husk
Rice husk Cold air
Biomass storage
Hot air Purification Unit
Turbine and
generation unit 100% syngas
Electricity Exhaust filter
Downdraft gasifier

16. Steps of electricity
generation from rice
husk
Step 1
Downdraft gasification
Step 2
Purification
Step 3
Electricity generation

17. Downdraft gasification
Fig. schematic diagram of a downdraft gasifier

18.  1. Drying
2.Pyrolysis (devolatilization)
3. Combustion (gasification)
High temperature from drying Steam
Steam + gas flow water gas chemical
reaction.
Pyrolysis Cracking and burning of most of
the primary tar.(200-300 ◦C)
combustion Char from pyrolysis goes
through gasification.

19. Basic reactions in the
entire process of
gasification
I. C+O2 CO2 ∆H=-393.5 Kj/mole
II. C+H2O H2+CO ∆H=-131.3 Kj/mole
III. CO+H2O CO2+H2O ∆H=-41.1Kj/mole
IV. 4CO+2H2O CH4+CO2 H=-520 Kj/mole

20. Purification unit (dry type)
Block diagram of purification unit
Gas from
gasifier
Air cooler
Gas cooler
Gas dryer
Gas flare
Cyclone dust
collector
Electrostatic
precipitator
Gas cooler
Buffer tank

22. Specification of purified
gas from the system
1. Average CV >1100-1200 Kcal/Nm3
2. Tar content <5-10 mg/Nm3
3. Particulates <5-10 mg/Nm3

23. Turbine and generation unit

24. HPS Plant
Rice Mill
Stored Husk
ToIndustry
Water Boiling
Ash
Husk
Cement
Plant
CO2
Broker
HPS
RHA
Refinery
RHA
Gasifier
Filters
Generator
PaddyPaddy Village
Home Clusters
Pre-paid Meter
ToIrrigation
Irrigation Pump
Power to Empower
Village
Village
Village
Village
Revenue
RHA: Rice Husk Ash

25. National and
international case study
National case
Name: Dreams Power Ltd.
Location: Kapasia, Gazipur, Dhaka.
Project Sponsor: Infrastructure Development Company Ltd. (IDCOL)
Equipment supplier: Ankur Scientific Energy Technologies Pvt.Ltd. Of India.
Some parts also come from Italy and Germany.
Main parts of the project: Two downdraft gasifier, a dual fuel generator, four
electric motors and a spread pond.
Capacity: 250 KWh
Cost: Tk 2.5 Crore.
Support : Provides electricity to 300 households and commercial entities of
that area.

26. International case
 Plant is fully operational , input is combined with coal.
 Name : Vandana Vidhyut Ltd.
 Location : Sirgitti Industrial Area, Bilaspur, Chhattisgarh.
 Project sponsor : Self sponsored project of VVL
 Equipment supplier : VVL
 Main parts of the project : One high pressure boiler of 35 tph, 66kg/cm2,
5000C and a steam turbine generator (STG) single bleed cum condensing type.
 Capacity : 7.7 MW
 Cost : 254.85 million Indian Rupee
 Support : 10% of the generated electricity is used for auxiliary operation and
the rest is supplied to the grid.

28. Why choose rice husk for power
generation?
 Availability
 Co-generation plant
 By products
 Low budget

29. Still some obstacles!!
 Loan facilities
 Attitude barriers
 efficiency

30. Inspired by International Journal Of Renewable Energy
Research by Himadry Shekhar Dash