Yah! As GKD pointed out earlier as well, diverting crop land for fuel does bad things to food prices as well.Marten wrote:TF, am sure you already know that Sugarcane is extremely water intensive and will require far more water resources than available. We do not collection mechanisms in place yet even though the sugar coops are well organized. Plus petrol cannot contain more than 10% ethanol for current engines to perform without modifications. Jatropa otoh requires very less water, grows in arid areas including semi-desert areas. It can also be used up to 15% as bio-diesel without any modifications to engines, although additives will be required. Our strategy was to convert public transportation (buses) to CNG, and promote EBP for passenger cars, and bio-diesel for the 10% gain in diesel. If they manage to reduce just this much effectively, we should see great savings.
It was just a thought. Some sky writing on the potential.
I have been hearing this Jatropa thing since the 80's. There was even an attempt to grow it near Thirunelvelzi in the late 1980's. Several complications were run into IIRC.
- Yield was very very uneven.
- To get better yield you have to fertilize and water.
- Harvesting was a serious challenge.
- Fallen fruit needs to be picked up. A lot of fruit fell before ripening. I some cases all of it.
- Soil needs to be very fertile but dry for yield.
Since then numerous attempts have been made but economic viability has been missing. Far too much effort for too little yield.
Sugar Ethanol is different, it piggy backs onto the existing Sugar industry. India is second largest in the world. It depends on molasses a waste product. It uses the heat from burning bagasse to process the mash. All these things Sugar ethanol reach energy payback of 8:1. For comparison the energy payback of corn ethanol is 1.5:1.