PRODUCTION OF ELECTRICITYFROM RICE HUSKByNikhil.PSai Madhav.G
EpilogueThis study considers the environmentalassessment of power generation from rice husk,a waste product in rice mills.
LIST OF CONTENTS1. INTRODUCTION2. RICE HUSK3. PROCESS DESCRIPTION4. RESULTS5. CONCLUSION6. REFERENCES
INTRODUCTION• Utilization of fossil fuels has caused seriousenvironmental impacts such as global warmingcaused primarily by COX and acidification by SOXand NOX.• Unlike fossil fuels, biomass can be used to reducegreenhouse effect because trees absorb CO2 asthey grow and this carbon is released when thebiomass is combusted.• To confirm whether energy production frombiomass has lower emissions than conventionalfuel production, an environmental assessment isdone in this study using the life cycle assessmentmethodology.
Rice Husk• Rice hulls (or rice husks) are the hardprotecting coverings of grains of rice. Inaddition to protecting rice during the growingseason, rice hulls can be put to use asfertilizer, insulation material, or fuel.• Use: A number of rice-producing countries,(e.g., India, Thailand), are currentlyconducting research on industrial uses of ricehulls.
Process Description• System boundary of the study is set for doingthe environmental assessment using the LifeCycle approach.• Raw material, electricity and resourceconsumption, electricity generated, waste andemissions generated have been consideredwithin the boundary.• List of all flows – Water, Flue gas, Steam,Electricity and ash.
Results• SO2, NO2 and CO2 emissions from the process arestudied and they are found to be less than the otherproduction methods which we are using presently.• Dust emissions from rice husk power plant are higherthan coal and gas power plants, but slightly less thanoil power plants.• It is known from previous research that rice huskcombustion produces significant amounts ofparticulate matter.• However, the rice husk power plant has multi-cyclone and electrostatic precipitator for dustremoval.
CONCLUSION• In India, a large portion of the electricity productionis from fossil fuels causing concern for energysecurity as well as environmental emissions of CO2,SO2 and NOX.• Biomass has been proposed as one of thealternative (renewable) energy sources of energywhich can, to extent, offset the use of fossil fuels.• This is especially suitable for India since it is anagricultural country.• However, it must be ascertained whether electricityproduction from biomass is really benign.
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