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OK, here is the answer to question # 1 of Monday Math. 10

Q. How big are the bio-reactors?
answer using just the info on the posts.

25,000 scfm CO2
X .12342 conversion factor (CO2 gas to CO2 lbs.
=3,085.5 lb/min CO2
./. 2.8 lbs. CO2 = 1 lb algae ( ./. means divide)
=1,101.9 lbs. dry algae per minute.
X 454 grams per lb.
=500,291.7 grams dry algae /min
X 1440 min. per day
=720,419,040 grams per day
./. 113.4 grams per day per gal
=6,352,901 gals in reactor capicity to convert 25,000 cfm of CO2 per minute 24/7/365!
There it is in 8th grade math.!!
Fri May 21 2010 01:50:24 AM by SAMDevelopment 1558 views

Comments - 9

  • Parkavi wrote:
    Fri May 21 2010 04:19:05 AM

    Looks like carbon capture using algae is going to be a tough job!!
    Trying to imagine the area required for such a system..

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  • Abomohra wrote:
    Fri May 21 2010 09:08:11 AM

    Please can you give us more details about these abbreviations, lbs, lb, .... because I need these conversions urgent.

    Thanking you in advance

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  • Fri May 21 2010 11:38:42 AM

    Parkavi,....You are right, the problem is you are trying to imagine the wrong kind of system. I have been told by people who should know that a ditch system would take between 12 and 16 thousand acres. This like you say, is unthinkable

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  • Fri May 21 2010 11:47:29 AM

    Parkavi..continued...Our 6 bioreactors are 8 feet deep. each is 200' long by 88'wide. Each holds ~1,053,184 gallons. Construction cost is about .74
    cents per gallon. Net footprint is 105,600 sq.ft.
    X 2 for processing and storage =less than 5 acres!

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  • Fri May 21 2010 11:52:58 AM

    Abomohra....lbs is the same as lb, they both mean pound or pounds. 1 pound = 454 grams.
    Are there any other abbreviations where I need too make clearer?

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  • Abomohra wrote:
    Fri May 21 2010 01:40:54 PM

    No .. thank you very much for this Explanation. Now you want to say that we should go forward for using of photobioreactors and don't use open bonds?? Or did I understand wrong??

    Best Regards

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  • Fri May 21 2010 02:53:06 PM

    Abomohra, You have the right idea...no open ponds, over a 25 years period the maintenance
    cost will for out do a positive ROI. Remember,
    ditch/pond systems only work in sunlight and heating and cooling costs are prohibitive.
    Do the math. What is going to be the cost of 14,000 acres.....even if it were availible. And how about the competition of this algae farm with food crops. You have to have good level prime farm land for ponds and ditches. Think about the
    hundreds of miles of pipeing and valves etc. etc.

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  • Fri May 21 2010 02:58:11 PM

    Friends Of Algae;

    Sat. I will answer Question #2.

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  • Mon May 24 2010 05:49:07 PM

    Hasseli,
    I will work on this problem this evening after work.

    Alan Schaefer

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