- Sanitation systems
- Treatment of wastewater, sludges, organic waste, excreta
- Anaerobic treatment systems (biogas sanitation)
- Biogas sanitation (systems focusing on biogas production)
- Increase of biogas production using low-cost nanoparticles (Uni Barcelona), Spain
Increase of biogas production using low-cost nanoparticles (Uni Barcelona), Spain
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onlinelibrary.wiley.com/doi/10.1002/smll.201303703/abstract
Now working in a paper on continous mode.
scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
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You need to login to replyRe: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)
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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
scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
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You need to login to replyRe: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)
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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).
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.
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You need to login to reply- Elisabeth
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Re: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)
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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.
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You need to login to replyRe: Increase of biogas production using low-cost nanoparticles (Uni Barcelona)
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We have the methodologies ready to measure lipases, cellulases and proteases.
We will try it.
scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
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You need to login to replyLow 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
Karachi, Pakistan
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You need to login to replyNow 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!
scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
Attachments:
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final_biogas.png (Filesize: 52KB)
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You need to login to replyHmm... 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?
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You need to login to replyWe are happy!
(in the figure, scale time is in hours and R2 is the only anerobic digester with nanoparticles)
scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
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starving.JPG (Filesize: 108KB)
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You need to login to replyRe: Increase of Biogas Production Using Low Cost Nanoparticles-FOR THE FORUM
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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).
scholar.google.es/citations?user=f2hh0z8AAAAJ&hl=ca
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You need to login to replyRe: Increase of Biogas Production Using Low Cost Nanoparticles-FOR THE FORUM
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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?
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You need to login to reply- Sanitation systems
- Treatment of wastewater, sludges, organic waste, excreta
- Anaerobic treatment systems (biogas sanitation)
- Biogas sanitation (systems focusing on biogas production)
- Increase of biogas production using low-cost nanoparticles (Uni Barcelona), Spain