BIODIESEL & SVO DISCUSSION FORUMS





Sponsors    Biodiesel and SVO Forums Home    Forums  Hop To Forum Categories  Algae  Hop To Forums  Algae Biodiesel    Heterotrophic algae growth using Glycerol

Moderators: Shaun, The Trouts
Go
New
Find
Notify
Tools
Reply
  
Heterotrophic algae growth using Glycerol
 Login/Join
 
Member
posted
This sort of blows my mind. Algae can be grown in the dark and fed waste glycerine.
Has anyone heard of this? Cause one of the questions I have, does it also need co2, or is the glycerine replacing nutrients that would otherwise be in wastewater?

http://biogas.ifas.ufl.edu/Int...011/files/kalvin.pdf

http://www.youtube.com/watch?v=-kX_9JhZdm8
 
Registered: February 05, 2012Reply With QuoteReport This Post
Member
posted Hide Post
Dear Fiach,

I have recently been carrying out some heterotrophic growth experiments in my lab at Penn State. Companies such as Solazyme do this commercially in large fermentors (in the dark) using sugar.

When algae grow in the dark they don't have the "light" energy to convert CO2 to biomass. An external carbon energy source such as glucose (sugar), glycerol or acetate is needed for biomass growth.

When they grow in this fashion, they don't use CO2, but rather need oxygen and they actually respirate CO2.

Some algae, such as Chlorella vulgaris, both in the light and using a carbon feed which is called "mixotrophic". Thus it can convert both CO2 and glycerol/glucose into biomass. I would be interested in carrying out an experiment to use both biodiesel derived glycerol to grow algae in the light to also capture CO2. It would be interesting to see if the algae can grow faster if it is cloudy out because they have that extra carbon source.

~Ryan J.


Chemical & Energy Engineering -- The Pennsylvania State University
 
Registered: May 22, 2008Reply With QuoteReport This Post
  Powered by Social Strata  
 

Sponsors    Biodiesel and SVO Forums Home    Forums  Hop To Forum Categories  Algae  Hop To Forums  Algae Biodiesel    Heterotrophic algae growth using Glycerol

© Maui Green Energy 2000 - 2014