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Choose the best method - Open pond, PBR, Hybrid, Fermentation ???????? 56

Open -pond will be economically viable say many of them. Open ponds offer a lot of advantages over other cultivation methods claim scientists. Is this really the best option???

PBR's -wowww! High productivity and can do wonders! can save a lot of space too.. I mean it can over come the constraint faced due to lack of land availability

A few of them say - Hybrid system - A open-pond which is covered will prevent contamination but will there be other issues??

Some big companies claim - Open ponds are not feasible nor are the PBR's . but they are sure about what is called dark fermentation. Algae are photosynthetic organisms and they grow in dark?? Oh well, they can if they are provided sugar instead of light. This will overcome the challenges faced by Open-ponds PBR's and hybrid systems.. But aren't these sugars expensive?


Can open- ponds be used - Low cost , Low productivity
Can PBR's be used - High cost, High Productivity
Can Hybrid tech's be used - High cost, Scaling up issues
Can fermentation be used - High cost and less availability of sugar

Which is going to work???????
Fri August 13 2010 01:55:01 PM by Sumukhi 2458 views

Comments - 5

  • Natalia wrote:
    Fri August 13 2010 02:13:20 PM

    I thought scaling up issue is all pervasive :-)
    for all the four options !!

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  • Pami wrote:
    Fri August 13 2010 06:28:16 PM

    That's a really nice observation..Thank you..
    I feel that one of the most important aspect in Algae as fule is the conservation of space..Once u start growing algae in ponds u are using up space and pose problems for agriculture ..

    Definetly PBR's should be taken up as a solution. However, scaling up can be a problem...with improved strains of algae and modification of steps involved everything should be alright..

    the fourth system looks interesting..will algae absorb sugars from media and survive!!!...that will be great!!..

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  • Larsyn wrote:
    Fri August 13 2010 07:57:29 PM

    Space should not be a concern. If all feed lots chicken ranches & city wastewater plants devoted space to algae prpduction we probably wouldn,t need additional space. PBR's are more for control than size reduction.

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  • Fri August 13 2010 11:07:30 PM

    Good post Sumukhi!!
    Now you are starting to think along the right lines. I would like to comment on some of your paragraphs, if I may?
    P # 1. "Scientists claim advantages for open ponds" I feel sorry for 90% of the scientists
    who have invested all of that time and money and still don't have the common sense to realise that
    open pond systems will not 'work' in the real world...............P # 2......PBRs, high productivity....small footprint. You are 100% right. We are working with a company that would take 17,000 acres of just working surface area
    thats ~12 square miles!! Our 1,000,000 gallon PBRs will with all roads buildings, office etc. do a job 24/7/365 on only 24 acres. Talk about footprint .....some people are going to go hungry if open ponds are the answer..........P # 3.......Hybrid system.... covered open ponds, no contamination.......WRONG all systems will have contamination, some worse than others. With the hybrid you have the worse of both systems..........P#4.......Algae in the dark???this will work, there are some specie of algae that will grow in the dark and they eat sugars.
    Where is the gain??? They get some or all of their C from the sugar and not from CO2. I thought we were all about cleaning up CO2, well maybe not cleaning it up but at least recycling it...Good job Sumukhi, you are starting to ask the right questions, and finding some answers!........Alan Schaefer.......

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  • Krupali wrote:
    Sat August 14 2010 12:24:31 AM

    @ Alan Schaefer !

    Why dont you write your name in your profile.
    It took me a while to find your name so that I could address you formally instead of SAM Development.

    Can you kindly describe the large PBR that you are designing and developing . All over again.
    What it is ? Why ? How it is better than other PBRs and other systems. How does it avoid contamination? How it solves the angle of cost?
    From what you are saying, it sounds like a monster PBR and it will also have a huge capital cost? Am I right ? Is it affordable ?

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