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Converting rice residues into energy - opportunities and challenges


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

Published in: Technology
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Converting rice residues into energy - opportunities and challenges

  1. 1. Rice residues for renewable energyKick-off workshopCommunity-based climate change mitigation throughsustainable rice productionDo Duc TuongRenewable Energy AdvisorNetherlands Development Organization (SNV Vietnam)Dong Hoi, November 23, 2012
  2. 2. Presentation outline1. Problems2. Opportunities3. Challenges4. What will we do in SRI project?5. What do we expect? Title 2
  3. 3. 1.Problems – Energy balance of Vietnam to 2030 Energy shortage Source: Do Duc Tuong, 2012 Title 3
  4. 4. 1.Problems – Rice straw burningEvery year, rice straw burning in Vietnam emits:23 million tons CO224.000 tons CH468.0000 tons COThe economy lost 230 million USD(50% rice straw burnt, 10$/ton CO2) Title 4
  5. 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. 6. 2. Opportunities – High potential biomassresources Rice production in Vietnam (2000-2010) Source: Title 6
  7. 7. 2. Opportunities – High potential biomassresources 32 mil. ton/year Title 7
  8. 8. 2. Opportunities – High potential biomassresources 8 mil. ton/year Title 8
  9. 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. 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. 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. 12. 2.Opportunities - Rice straw pelleting Density 600kg/m3 Heating value: 15MJ/kg 1ton pellet ~ 20 LPG tanks Title 12
  13. 13. 2. Opportunities - Gasifiers using husk, straw pelletsEffciency: 35-45%1% PM compared with iron bar Photos: Tuong,Dr.Thanh Title 13
  14. 14. Standing on a gold mine ! Title 14
  15. 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. 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. 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. 18. Photo: Hữu TâmThank you for your attention ! Title 18
  19. 19. Reference•• Title 19