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Agriculture Organic farming, remineralization, rock dust, biochar, soil micro organisms and other discussion relating to soil, water and food.

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  #1  
Old 05-27-2014, 04:23 PM
jigglybulba jigglybulba is offline
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Join Date: May 2014
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Growing Algae -- Energy Balance & Light Requirements

Hi all,

I am looking into the photonics behind growing algae. I am trying to connect the dots between the light requirements & energy balance of photosynthesis:

6H20 + 6CO2 + 48γ -> C6H12O6 + 6O2

ΔHr = 2802 kJ per mol of glucose

8 mol γ per 1 mol CO2

E = 217 kJ per mol of photons (at 550nm, the average between 400-700nm).

Some of my questions are:

How much of this energy comes from light?

How can I calculate this mass-energy exchange?

How can I get from this energy requirement to an irradiance requirement?

Basically, I want to know how much light will grow a certain amount of algae (the mass-energy balance/transfer). Thanks!
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Old 05-30-2014, 10:08 PM
David007 David007 is offline
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mmm... i read in other Thread 12 hours of lighting, and i think need the light of sun, or ecuivalent in artificial lighting, i think 600 w for 1 m2, but dipend from tipe of lighting if are led or other.
how is the life of spirulina? how she increase ? how time need to make double ?
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