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Produce More Food?

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Enthalpy:

--- Quote from: Enthalpy on March 18, 2022, 08:14:27 AM ---[...] French Guyana would produce rice. Neighbouring Suriname was a huge rice producer before the civil war. [...]
--- End quote ---

The rice production of Suriname peaked at disappointing 300kt/year long ago. Several harvests per year can increase the production quickly, and French Guyana could produce as much too. Interesting operation for the Guyanas, but this won't compensate the mean 28MT/year wheat produced in Ukraine.

Enthalpy:
If we were to believe this newspaper article, Australia has harvested exceptionally much wheat but can't export it for lack of ports
  aljazeera
Such a sub-detail stopping a group of hungry Sapiens sapiens is absurd. And it's a multi-G$ matter. Let's have a look.

The multi-lane West Gate Bridge in Melbourne accommodates cargo ships of decent size. So does the Sydney harbour bridge. Both cities serve the Murray-Darling basin
  wikipedia
At the slow lane of each direction, replace a bridge deck element by a metal grid. Trucks dump their load through the grid in the cargo ship below, ¡Olé!

Dedicate one lane pair to the operation, say during nighttime. Each truck shall dump 25t wheat (surely Australian trucks are bigger) in 1mn. In 10h, a cargo is filled with 30 000 t wheat. 300 cargo ship rotations carry 9Mt away in a year. Does this match the missing capacity? There can be more grids in a lane (with funnels and pipes if needed), more lanes used to dump wheat, more bridges. Trucks can be bigger and dump several trailers simultaneously. If a bridge fits, a train can do the same.

Marc Schaefer, aka Enthalpy

Enthalpy:

--- Quote from: Enthalpy on March 19, 2022, 04:13:42 PM ---[...] crystallize the saturated ester or acid, then recreate triglycerides with the unsaturated acids [...]
--- End quote ---

Here are phase change temperatures for the main acids of palm oil. As expected:

* Double bonds act little on the boiling point.
* Cis double bonds depress the melting point.
* So solidification shall fractionate the mix.Nist gives melting points and atmospheric boiling points for the methyl esters
  tsapps.nist.gov

mp °C   bp °C      Methyl
=============================
+38     361        Stearate
+28     332        Palmitate
=============================
-20     344        Oleate
-43     346        Linoleate
=============================
mp °C   bp °C      Methyl

Nist gives the melting points of the fatty acids
  Stearic - Palmitic - Oleic - Linoleic
while the database of the Mpbpvp software brings the experimental atmospheric boiling points.

mp °C   bp °C      Acid
============================
+68     383        Stearic
+62     352        Palmitic
============================
+16     360        Oleic
 -7     365        Linoleic
============================
mp °C   bp °C      Acid

A double bond lowers the melting point by 50K at the acids too, and the separation temperature seems cheaper.

This separation between healthy edible oil and fuel should be done all time, not just when lacking sunflower and corn oil.

Enthalpy:

--- Quote from: Enthalpy on March 12, 2022, 10:52:47 AM ---[...] grow cereals for human consumption on the best lands and send the cattle pasture grass on the bad lands. [...]
--- End quote ---

Maybe some cattle could pasture in the mountains again? Spain has unused moutain area, Italy and Portugal a bit too. France has underused land in the centre-South.

An other way to eat less meat, feed less cattle, keep their vegetables or fields for human consumption? Eat more vegan dishes. Presently in rich Europe, vegan dishes are slightly more expensive than meat, but this can change if people buy vegan more often. These dishes are made from wheat and soja proteins, hopefully a kg of vegan dish uses fewer kg vegetables to produce than a kg meat, and the leftovers are usable too.

Laboratories grow meat with no animal. This shall produce the same animal proteins using less vegetables. Still not marketed to my knowledge.

In the EU, fallow fields will be cultivated
  n-tv.de

Enthalpy:

--- Quote from: Enthalpy on March 19, 2022, 04:13:42 PM ---I propose to convert the complete palm oil to methyl ester or to the free acid, crystallize the saturated ester or acid, then recreate triglycerides with the unsaturated acids mainly.
--- End quote ---

The same process can extract healthy unsaturated oils from coconut oil and animal fats.

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