Download - Carbon sequestration in soils
CARBON SEQUESTRATION IN SOILSBy H.SAI NADH DORA(13331A0816) ARUNENDRA YADAV(1331A0803)B KUSUM KUMAR(1331AO804)
DEPARTMENT OF CHEMICAL ENGINEERING
MVGR COLLEGE OF ENGINEERING(AUTONOMOUS)
VIZIANAGARAM
INTRODUCTION
In pre-industrial times, every million molecules of air contained about 280 molecules of carbon dioxide. Today that proportion exceeds 380 molecules per million.
If carbon dioxide levels continue upward, further warming could have dire consequences, resulting from rising sea levels, agriculture disruptions, and stronger storms (e.g. hurricanes) striking more often.
Fossil fuels, which provide about 85 percent of the world’s energy, are made of hydrocarbons, and burning them releases huge quantities of carbon dioxide.
Strategies to Reduce Atmospheric CO2
Strategies
Reduce fossilfuel consumption
Identify sinks andsequestration
rate
Improve efficiencyRenewable
energy sources Terrestrial Aquatic
Soils Plants
Geologic
WHAT IS CARBON SEQUESTRATION ? Carbon sequestration is capturing the carbon
dioxide produced by burning fossil fuels and storing it safely away from the atmosphere.
HOW DO WE CAPTURE CO2 ? There are several processes that captures CO2
some of them are: Commercial Carbonization in beverage industries ,
dry ice manufacturing.
Crystal structure of dry ice
Carbonated water
Conservation tillage
Cover crops
Soil organicmatter
TECHNIQUES TO ENHANCE CARBON SEQUESTRATION IN SOILS
Crop rotation
Why Tillage Eliminate soil compaction Control weeds Eliminate residue
Harbor insects and diseases Tie up fertilizer N Barrier for herbicide
What hard working people do
Sense of accomplishment Cleansing operation Why not?
Because it causes soil erosion and reduces soil organic matter
Soil Organic Matter(Humus)
CO2
product
energy
Climate
ManagementSoil Type
Potential cost of soil sequestration of soil
Nitrogen fertilizerNitrogen fertilizer can increase soilorganic matter because nitrogen isoften limited in agro ecosystems.
Growing plants on semi-arid lands Growing plants on semiarid lands
has been suggested as a way to increase carbon storage in soils.
Burning coal with pure oxygen rather than atmospheric air.
Replacing smoke stacks with absorption tower
CONCLUSION Carbon sequestration can be done to
reduce the carbon content in atmosphere but not totally.
Apart from reducing the global CO2 levels, soils carbon sequestration is a strategy to achieve food security through improvement in soil quality.
Carbon sequestration will enable us increase and maintain retention time of CO2 in soils, water bodies etc.
Any queries ?