Presentation was prepared for the kick-off workshop Ausaid funded project, implemented by SNV Vietnam. Duration: Julne 2012- Dec 2014

1. Rice residues for renewable energy
Kick-off workshop
Community-based climate change mitigation through
sustainable rice production
Do Duc Tuong
Renewable Energy Advisor
Netherlands Development Organization (SNV Vietnam)
Dong Hoi, November 23, 2012

2. Presentation outline
1. Problems
2. Opportunities
3. Challenges
4. What will we do in SRI project?
5. What do we expect?
Title 2

3. 1.Problems – Energy balance of Vietnam to 2030
Energy shortage
Source: Do Duc Tuong, 2012
Title 3

4. 1.Problems – Rice straw burning
Every year, rice straw burning in Vietnam emits:
23 million tons CO2
24.000 tons CH4
68.0000 tons CO
The economy lost 230 million USD
(50% rice straw burnt, 10$/ton CO2)
Title 4

5. 1.Problems – Indoor air pollution
Rice straw is no longer used for cooking
• Low bulk density
• Low efficiency stove
• Dusty
• Smoky
• Hot
• Health problems
• Time wasting
• Uncomforting
Women and Children
Title 5

6. 2. Opportunities – High potential biomass
resources
Rice production in Vietnam (2000-2010)
Source: http://www.unapcaem.org/
Title 6

7. 2. Opportunities – High potential biomass
resources
32 mil. ton/year
Title 7

8. 2. Opportunities – High potential biomass
resources
8 mil. ton/year
Title 8

9. 2. Opportunities - Rice husk briquette for boilers
Rice husk briquette is cheaper!!!
1 ton husk briquette = 1.6 Mil. VND
800 kg power coal = 2 Mil. VND
600 kg hard coal = 2.9Mil. VND
(For the same heat capacity)
Title 9

10. 2.Opportunities - Rice straw baling machine
18 metric tons/day
180kg/m3 (loose form 75kg/m3)
CER5070 model (made in Vietnam)
Photo: Dr.Lam Tran Vu
Title 10

11. 2. Opportunities – Rice straw fired power plant
First China’s biopower plant using 100% straw
Capacity: 150MW
Fuel: 220.000ton rice straw/year
Output: 1.9 billion kWh/year
1ha rice straw ~ 6000kWh
(powering 60 hh in 1 month)
Source: Prof. Cheng Xu, CAU
Title 11

12. 2.Opportunities - Rice straw pelleting
Density 600kg/m3
Heating value: 15MJ/kg
1ton pellet ~ 20 LPG tanks
Title 12

13. 2. Opportunities - Gasifiers using husk, straw
pellets
Effciency: 35-45%
1% PM compared with iron bar
Photos: Tuong,Dr.Thanh
Title 13

14. Standing on a gold mine !
Title 14

15. 3. Challenges
• Other uses of rice straw (animal feed, nutrient
compensation…)
• Small scale of rice cultivation (collection, ownership)
• Transportation (cost, distance, equipment)
• Awareness of local enterprises/farmers
Title 15

16. 4. What we do? (not limited to)
• Market scan
 rice residues management (mill level, farm level, household level)
 paddy drying cost/benefit,
 potential heat users (industrial, medium commercial)
 energy use patterns in cooking
• Review all suitable applications
• Testing technical issues (gasifying system, paddy drying,
boiler….)
• Piloting and demonstration
 Briquetting, rice straw baling, rice straw pelleting
 Gasification for cooking, heat users, brick kilns, drying system
Title 16

17. 5. What we expect?
Benefits for FARMERS and COMMUNITIES
• Increase income for farmers (straw sale, reduced fuel cost
for cooking, increase paddy quality)
• Job creation (straw collection, pellet production, stove
production, stove selling, pellet distribution)
• Reduce indoor air pollution (for women & children)
• Reduce environment pollution for local communities
• Reduce use of fossil fuels (often used for domestic cooking,
industrial boilers…)
Title 17

18. Photo: Hữu Tâm
Thank you for your attention !
Title 18

19. Reference
• http://www.biomassandbioenergy.nl/filesricestraw/BakkerElectricityHe
• http://www.hua.edu.vn:85/tc_khktnn/Upload%5C2132012-Tap%20ch
Title 19