Week 3: Bioenergy

Hi everyone,

Welcome to the Third Course Unit!

I speak for all the Tutors and Organizers when I say that the first two weeks well exceeded what we could possibly have hoped for.

This upcoming week is filled with inspiring collaborations, enriching discussions and challenging project work- let‘s surpass what we have achieved so far! The third unit’s material holds a technical overview on bioenergy resources and technologies, biogas fundamentals, and the many uses of biogas in agricultural value chains. This week’s reader will introduce the process by which methane is generated, the technologies that can be used to generate methane and factors to consider when choosing a technology, and the different ways biogas can be used as an energy source.

What an enriching and truly educational experience so far, good job everyone! Let‘s keep up the good work!

Thank you!


Quiz 3


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  1. Profile photo of Lynette Rudder

    Intense past two weeks,but having a greater understanding of the Agriculture nexus community.

  2. Profile photo of Alina Violeta Gioaba

    i was surprised about the biogas information. I thought that biogas was used more.

    A while ago i visited a distillery that had implemented a cogeneration system and I consider it a very good option to leverage resources. Other industries should take example

  3. Profile photo of Nyambe mununka

    I was so looking forward to this topic. Wanted to learn more. Miguel franco has inspired me and taught me a lot from his video

  4. Profile photo of Charlotte Newiadomsky

    I liked the additional information on cogeneration, which was quite a good overview.

  5. Profile photo of Kristin Hentschel

    The lecturer of this video is really good in knowledge transfer about biogas. it is a pleasure to see and understand this video.

  6. Profile photo of Sadiq Abubakar, Garuba

    I designed a biogas system two years back and didn’t have the resources to see it through. I have to learn more to improve on my designs. Thank you for the information Sir.

  7. Profile photo of Sonya Hossain Firoz

    Too many errors in this quiz. Fill in the blanks does not work even if you give the correct answers. Very poorly designed quiz and quite impossible to pass with correct answers.

  8. Profile photo of Claire Stam

    Fill in the blanks at question number 2 is simply not working. Even though my answer was correct, it always came up as incorrect. And i tried several formulations.

  9. Profile photo of Phillip Goredema

    amazing how biogas has all those technologies, very enlightening I only knew about fixed dome digestors. I am sure municipalities in my country can try out the Large scale like the large scale aerobic lagoon as a source of energy in light of the huge power deficit in southern Africa

  10. Profile photo of Muhumuza Albert

    Hello every one , please members vote for me by leaving comment or alike on this link http://blog.gfar.net/2016/02/20/yap-proposal-5-pig-feed-production-muhumuza-albert-uganda thank you

  11. Profile photo of Mr. Anthony Madume

    Week 3 Reader and Additional reading materials made the Bioenergy and Technologies very interesting and equally exhaustive. Well put together, however some of us who are not scientists (but are it the social science field) may / will be lost in the reading materials. Nonetheless, the information provided excellent insight into the bioenergy processes down the point of us. I personally gained good insight of how biogas if formed, its various uses and the various types and sizes of technologies that can be used to harness it / them.

    A congratulations to the Tutors.

    I sincerely pray to complete this MOOC successfully.

    Anthony Madume

  12. Profile photo of Eduardo López Conde

    really usefull information about biogas. i learnt a lot. thanks

  13. Profile photo of Charles Dakoua Diarra

    Course is now very interesting as we are dealing with practical courses after the interesting two weeks introduction period.


  14. Profile photo of Bernard CONILH de BEYSSAC

    Very interesting week on energy efficiency, technology and processes. I would be interested to connect better technologies with types of farming systems.

    Circular economy was mentioned but at which level? It would make sense to talk about circular economy at farm level? or energy sovereignty (beyond security)?

  15. Profile photo of Seth Jansen

    I would have been curious to know more about the energy density potential of the different feedstocks

  16. Profile photo of RONALD MARUMBI

    surely biogas potential needs to be utilized, for cleaner production practices

  17. Profile photo of lesley weller

    many errors in this week and I do not have a check mark even having the work completed….why is this?

  18. Profile photo of SAMUEL G. LADEJOLA-OGINNI

    @PowerMOOC.. The Admin should correct the challenge in Quiz 3. I missed 2 point but the system declined to earn me the Badge, which is qualified for 80% score

  19. Profile photo of Kabir Lawal

    Great discussion on bioenergies. We need more technologies to harness the potential of biogas while keeping its costs low

  20. Profile photo of Richard Aoun

    The material especially the readings and videos are really great. However I feel the additional readings are overwhelming. I would wish they are reduced so we could actually go through them and not be late in our weeks.

    Anyways, that’s just a personal opinions, but overall the 3 weeks that I’ve done have been very fruitful.

    Thank you.

  21. Profile photo of Ugochukwu Nwachukwu

    The biogas option seems to hold a lot of promise , due to its lesser cost and fuel flexibility for various activities.Is it possible to build a biogas Cost benefit analysis tool which can be adapted to different scales of agricultural production.

    Also it possible to extract the CO2 from biogas production to be used in greenhouses.

  22. Profile photo of Ugochukwu Nwachukwu

    The biogas option seems to hold a lot of promise , due to its lesser cost and fuel flexibility for various activities.Is it possible to build a biogas Cost benefit analysis tool which can be adapted to different scales of agricultural production.

    Also is it possible to extract the CO2 from biogas production to be used in greenhouses.?

  23. Profile photo of Montserrat Lluch Cuevas

    I would like to add a couple of comments with regard to the reader – AD technologies.

    (1) In my opinion it would be good to introduce the dry AD concept, which usually used for substrates with a high DM content .

    Common industrial Anaerobic digestion (AD) plants can be classified according to the operation mode (batch or continuous), according to the digestion temperature or the number of stages (one-, two- or even multi-stage systems). In addition the AD process can be classified by wet or dry digestion. It is true that wet digestion plants (like in Figure 6 of the reader) are most common in agriculture; they are operated normally with a dry matter (DM) content of the input mix < 15-20%. When digesting higher amounts of solid materials, water content needs to be adjusted (addition of liquid substrates, water or recirculation of digestated).

    (2) Small-scale technologies: During the last years new and improved digesters have been devoloped. Different options are available on the market.

    One of the common drawback of the popular small-scale technologies introduced in page 16 and 17 is the lack of stirring.

    For example, the so-called HoMethan biodigester is a foldable and packable bag biodigester made of a durable material (which ensures longer lifespan) and equipped with a manually stirring system and a manhole. Stirring is one of the main operating parameter in wet AD systems and increases biogas production, avoids scum formation, sedimentation and swimming layers.

  24. Profile photo of DJOUSSE Boris Merlain

    technical aspects of Cogeneration not developped

  25. Profile photo of Manuel Palm

    I was interested in this part of the course, but in only one week and with people with different backgrounds it can’t be as deep as I expected.

    Additional material is a good source to investigate and learn more.

  26. Profile photo of Wendy Simons

    I agree that the additional materials are especially valuable for this week’s lesson. There is too much to cover in just the main lesson.

  27. Profile photo of Ifedayo Adeoba

    Thank you for this. It is so detailed.

  28. Profile photo of OSSY IGWILO

    I feel that if biomass requires above $4000 to produce 1 KW ,this is not sustainable and feasible,although i am researching on small scale biomas and i believe from the information i have gotten that is feasible but not that sustainable.I know a man from NIgeria who altered his generator and supplies it with biogas to produce electricity,however it onlu produce power for 30 minutes.He gets his waste for poultry.He also supplys the bio gas to cook and for lighting.From what i have learnt from here i believe i can sonsult for him and enhace his knwledge base,because he can use grease,lipids and bakery waste which supplys more cubic feet of gas.

  29. Profile photo of Judith Ephraim

    This information will prove useful in my designing of a project .

  30. Profile photo of Judith Ephraim

    This quiz was a good challenge and ensured that I learned a few new things.

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