Monday, June 21, 2010

I started up my culturing apparatus the other day to test its effects as a CO2 room scrubber. It's currently sitting in my window sill with the air pump on a timer. It has been growing fairly quickly. I've been weighing the apparatus every other day and am surprised to see such an increase in such a small container. The true weight test will be when I start making dry measures of the filtered algae cells which should be sometimes late this week. Until my filtration apparatus comes in the mail I will be using coffee filters (about 20microns) to filter the algae out of my system.

I produce roughly around 200g of CO2 daily in my bedroom (1kg daily into the environment).
1 gram of algae dry mass is approximately equivalent to 1.8g of CO2.
Therefore I would need about a 30 gallon tank to filter out the necessary CO2 produced in my bedroom. Yes I am currently using a 1.5L vessel to perform these duties, this is of course just a test to see how efficient my homebrew device is compared to some of the "big boy's" in the industry.


  1. I am in the process of building a desktop photobioreactor for CO2 scrubbing. Do you have any recommendations for a goos algae strain that either a) are efficient or b) are a nice bright green (aesthetics is actually more important than efficiency in my project...)?


  2. Yes robotguy, Chlorella vugaris would probably be the most aesthetic if you are looking for a nice coherent green color. It's cheap, eukaryotic, and not very picky about perfect living conditions.

    There are some red algae out there, however most of the ones I have encountered are either hard to grow in large quantities in DIY reactors, or they become "stringy" and do not have good aesthetic value.

  3. Chris

    Would you be interested in Diatoms.
    They are easy to grow and they are good food for fish, chicken, etc.