Increase of biogas production using low-cost nanoparticles (Uni Barcelona), Spain

22.5k views

Page selection:
  • tonacho
  • tonacho's Avatar
    Topic Author
  • My main research activities have been focused on biological waste treatment, especially on composting processes
  • Posts: 15
  • Likes received: 2

Re: New paper on biogas enhancement with nanoparticles!

About batch processes:

onlinelibrary.wiley.com/doi/10.1002/smll.201303703/abstract

Now working in a paper on continous mode.
Antoni Sánchez Ferrer (male, PhD) is Full Professor in the Department of Chemical Engineering at the Universitat Autònoma of Barcelona. His main research activities have been focused on biological waste treatment, especially on composting processes.

scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca

Please Log in to join the conversation.

You need to login to reply
  • tonacho
  • tonacho's Avatar
    Topic Author
  • My main research activities have been focused on biological waste treatment, especially on composting processes
  • Posts: 15
  • Likes received: 2

Re: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)

Yes, we have very positive results.

However, we are about to publish it, and they are not still open and validated.

I will put the links here when the acceptation arrives (let's hope so!).


Toni
Antoni Sánchez Ferrer (male, PhD) is Full Professor in the Department of Chemical Engineering at the Universitat Autònoma of Barcelona. His main research activities have been focused on biological waste treatment, especially on composting processes.

scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca

Please Log in to join the conversation.

You need to login to reply
  • dorothee.spuhler
  • dorothee.spuhler's Avatar
  • Moderator
  • Developing methods and tools to support strategic planning for sustainable sanitation. Particular interested in novel technologies contributing to more inclusive and circular sanitation. Co-Lead of WG1
  • Posts: 311
  • Karma: 14
  • Likes received: 122

Re: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)

Hi Toni

I was wondering if you are still continuing with this projects as you had mentioned in the webinar we back in July?

Did you find out why the iron nano particles actually resulted in 70% biogas production increase (I am not sure if it was that much, in the figure you shared fin June it looks to be a little bit less but still a lot…) and why some of the particles prepared with different stabilizer didn't show that effect at all?

Did you manage to reproduce the biogas production increase also in pilot scale (100L) and continuous mode? You mentioned you were looking for a fecal sludge treatment plant in spain to test this if possible?

Cheers and happy new year,
Dorothee

PS: Has the paper you mentioned here been accepted, would it be possible to share it or a version of it?

Links, further readings, etc:
We are in the final stage of submitting our main first results to the journal "Science". Of course, the paper includes the funding of Gates Foundation in the acknowledgements. However, the paper is still in the hands of English revisers. I would prefer to include a link when the paper is published (in Science or other journal).

WG1 Co-lead
Developing methods and tools to support strategic planning for sustainable sanitation. Particular interested in novel technologies contributing to more inclusive and circular sanitation. This email address is being protected from spambots. You need JavaScript enabled to view it.

Please Log in to join the conversation.

You need to login to reply
  • Elisabeth
  • Elisabeth's Avatar
  • Moderator
  • Freelance consultant since 2012 (former roles: program manager at GIZ and SuSanA secretariat, lecturer, process engineer for wastewater treatment plants)
  • Posts: 3372
  • Karma: 54
  • Likes received: 931

Re: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)

For those of you interested in Toni's research, I can recommend watching this online discussion that we recorded with Toni on 1 July.
Toni's presentation starts at 2:32 into the recording (see attached file below); it is followed by questions and answers that start at 10:13 until 14:20.

I have added the Youtube link below to start at exactly the right time:



In the question session, the following was discussed:
  • the role of the stabilisers (they prevent agglomeration of the iron nanoparticles) in the observed increased biogas production; as well as the possibility that enyzmatic activities are increased with the additional iron.
  • I asked Toni a question about the costs: he explained that iron nanoparticles are very cheap when they are industrial grade (but expensive in the lab because here it is high grade). So he thinks that costs for adding the iron oxide nanoparticles should not be a prohibitive factor, and that the increase in biogas production (up to 70% increase in the lab) should far outweigh the additional costs of the nanoparticles.
Thank you, Toni, for your participation in this!
Dr. Elisabeth von Muench
Freelance consultant on environmental and climate projects
Located in Ulm, Germany
This email address is being protected from spambots. You need JavaScript enabled to view it.
My Wikipedia user profile: en.wikipedia.org/wiki/User:EMsmile
LinkedIn: www.linkedin.com/in/elisabethvonmuench/

This message has an attachment file.
Please log in or register to see it.

Please Log in to join the conversation.

You need to login to reply
  • tonacho
  • tonacho's Avatar
    Topic Author
  • My main research activities have been focused on biological waste treatment, especially on composting processes
  • Posts: 15
  • Likes received: 2

Re: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)

Good idea.

We have the methodologies ready to measure lipases, cellulases and proteases.

We will try it.
Antoni Sánchez Ferrer (male, PhD) is Full Professor in the Department of Chemical Engineering at the Universitat Autònoma of Barcelona. His main research activities have been focused on biological waste treatment, especially on composting processes.

scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca

Please Log in to join the conversation.

You need to login to reply
  • F H Mughal
  • F H Mughal's Avatar
  • Senior Water and Sanitation Engineer
  • Posts: 1026
  • Karma: 20
  • Likes received: 227

Re: Trying to reply

Many independent variables govern the performance of anaerobic digesters. Temperature, nutrients level, loadings, mixing, SRT, LRT, and solids recycle impact the performance of the digesters and the gas production.

Low bacterial population leads to low waste stabilization, resulting in low gas production. It is not only the question of rate of gas production, but also the percentage of methane component of the gas. Typically, 50 per cent of the methane component in the gas signifies essentially carbohydrate nature of waste.

Batch mode and continuous operation mode entails changes in the volatile acids concentration (their production by the acid-formers and, utilization by the methane-formers) and, this in turn, impact the gas production. Continuous operation of digesters, after reaching the equilibrium state, in general, give stable performance, assuming there are no wide variations in input variables.

F H Mughal
F H Mughal (Mr.)
Karachi, Pakistan

Please Log in to join the conversation.

You need to login to reply
  • JKMakowka
  • JKMakowka's Avatar
  • Just call me Kris :)
  • Posts: 1044
  • Karma: 35
  • Likes received: 359

Re: Trying to reply

Hmm, my first guess would have been improved enymatic digestion of cellulose and lignin. A quick google search turned up that there is a (albeit negative) correlation between the concentration of iron-ions and the activity of cellulases. Maybe that is something to look further into.

Please Log in to join the conversation.

You need to login to reply
  • tonacho
  • tonacho's Avatar
    Topic Author
  • My main research activities have been focused on biological waste treatment, especially on composting processes
  • Posts: 15
  • Likes received: 2

Re: Trying to reply

A lot of questions, not enought answers.

Now we are working with real sludge, it seems that when organic matter is consumed, microorganisms look for something that can consume, in this case something that is not biodegradable under continous mode, when you are feeding esaily biodegradable organic matter.

Moreover, it is something with a high biogas potential, as it is produced very fast.
Some fat?

We are still working and try to reproduce these results to prepare a strategy in a 100-L continuous reactor.

See the final figure attached.

We will keep you informed!
Antoni Sánchez Ferrer (male, PhD) is Full Professor in the Department of Chemical Engineering at the Universitat Autònoma of Barcelona. His main research activities have been focused on biological waste treatment, especially on composting processes.

scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
Attachments:

Please Log in to join the conversation.

You need to login to reply
  • JKMakowka
  • JKMakowka's Avatar
  • Just call me Kris :)
  • Posts: 1044
  • Karma: 35
  • Likes received: 359

Re: Working on continuous mode

Ahh, so my assumption that is is an batch process artifact was basically right, just not the explanation I offered. How economic would it be to increase the retention time in a continuous reactor to the point this effect would help at all?

Hmm... however maybe this would also help in digesting relatively low nutrient containing feedstock? Edit: That would actually a better test for your hypothesis than the one your graph seems to be based on, wouldn't it? E.g. Take already digested bioslurry, aerate it for a while, than put it back in the reactor and see if with the iron particles you can still get some more gas out of it or not.

Any suggestion why the iron nanoparticles actually have that effect? Are they acting as a sort of catalyst or as a final electron sink? Or do you suspect it is something else entirely?
The following user(s) like this post: Marijn Zandee

Please Log in to join the conversation.

You need to login to reply
  • tonacho
  • tonacho's Avatar
    Topic Author
  • My main research activities have been focused on biological waste treatment, especially on composting processes
  • Posts: 15
  • Likes received: 2

Re: Working on continuous mode

The nanoparticles increase the biogas production under starving conditions, when easily biodegradable organic matter is consumed. See the picture of three controls and an anaerobic digester with nanoparticles.

We are happy!

(in the figure, scale time is in hours and R2 is the only anerobic digester with nanoparticles)
Antoni Sánchez Ferrer (male, PhD) is Full Professor in the Department of Chemical Engineering at the Universitat Autònoma of Barcelona. His main research activities have been focused on biological waste treatment, especially on composting processes.

scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
Attachments:

Please Log in to join the conversation.

You need to login to reply
  • tonacho
  • tonacho's Avatar
    Topic Author
  • My main research activities have been focused on biological waste treatment, especially on composting processes
  • Posts: 15
  • Likes received: 2

Re: Increase of Biogas Production Using Low Cost Nanoparticles-FOR THE FORUM

Interesting.

We suspect that S can precipitate nanoparticles, we are carrying out now experiments to confirm it with sulphate as control. We have also observed that the stabilizer used to prevent the agglomeration of nanoparticles is essential to avoid this problem, which inhibits the improvement observed in the biogas production.

See a couple of nanoparticles with one stabilizer (NP1) and one with another, in which agglomerations is not observed (NP2).
Antoni Sánchez Ferrer (male, PhD) is Full Professor in the Department of Chemical Engineering at the Universitat Autònoma of Barcelona. His main research activities have been focused on biological waste treatment, especially on composting processes.

scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
Attachments:

Please Log in to join the conversation.

You need to login to reply
  • JKMakowka
  • JKMakowka's Avatar
  • Just call me Kris :)
  • Posts: 1044
  • Karma: 35
  • Likes received: 359

Re: Increase of Biogas Production Using Low Cost Nanoparticles-FOR THE FORUM

Hmm, without being an biogas expert, here is a wild guess:
Maybe that is an artifact of the batch mode, e.g. at a certain point methanogesis suppressing side products (NH4, H2S???) accumulate and prevent further methane production (and your iron nano-particles in turn bind them and prevent that), however in a continuous reactor those can escape before they cause a problem?

Please Log in to join the conversation.

You need to login to reply
Page selection:
Share this thread:
Recently active users. Who else has been active?
Time to create page: 0.192 seconds
Powered by Kunena Forum