SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Wed, 18 Jan 2017 18:09:40 +0000 Kunena 1.6 http://forum.susana.org/components/com_kunena/template/default/images/icons/rss.png SuSanA - Forum http://forum.susana.org/ en-gb Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: AParker http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20026 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20026
The membrane will be modular. However, we would be nervous about installing the toilet without the membrane as the untreated liquid component will still be pretty nasty - basically feacally contaminated urine, which could cause significant groundwater contamination, depending on the local conditions. Our energy modelling suggests we will be able to get enough energy out of the faces to enable the membrane processes.

The membranes are hydrophobic so fouling is not too much of a problem (a paper on this is in preparation).

Alison]]>
Processing technologies for excreta or faecal sludge Mon, 09 Jan 2017 12:36:13 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: JackAqucell http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20018 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20018 The idea of turning human waste into usable water, dry fertilizer and energy is great and the prototype of your design is beautiful. Congratulations!
As a membrane manufacturer, I agree with what Ecowater concerns about, the energy cost.
Very few water would go through the membrane fiber unless there is a pressure to force them to. To maintain the pressure consumes ennergy.
I see Alison and her team has been working on it to find the proper "selectivity". I think it might depend more on field data and sometimes, individual cases may differ a lot from each other.
Then it comes to the pollution resistance ability of the membrane itself. For a daily device for everyone, the least troublsome way is that it can clean itself when the fouling against the membrane module reaches a redline and we press a button for it to clean itself for two minutes and then it could go for another week. During this week, we may call and wait till the technician to arrive and replace it with the regenerated membrane module.
The called technician could be delayed by everything while the call of nature is absolutely not.
We have projects in Cambodia for membrane treated drinking water. The energy problem is tackled with bicycle generator.
Membrane technology opens a new gate to solve clean drinking water crisis and I'm happy to see that Alison and her team is working with it on human waste problem. I would be glad to share what we found in our application practice for this great idea.
Good luck!
Jack]]>
Processing technologies for excreta or faecal sludge Mon, 09 Jan 2017 02:13:17 +0000
Re: Reply: PhD Scholarship: Field testing a novel waterless toilet - by: JKMakowka http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20017 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20017 Processing technologies for excreta or faecal sludge Mon, 09 Jan 2017 01:46:34 +0000 Re: Reply: PhD Scholarship: Field testing a novel waterless toilet - by: muench http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20015 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20015 You might have overlooked Alison's response to your earlier request. She wrote on 6 December 2016:
Prince and Orchha - We're still in the development stage but I hope we'd be able to brign it to Kenya, Uganda and India in the future.

So I think you still need to be a little bit patient.
Regards,
Elisabeth]]>
Processing technologies for excreta or faecal sludge Sun, 08 Jan 2017 20:35:18 +0000
Reply: PhD Scholarship: Field testing a novel waterless toilet - by: prince http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20009 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#20009 Processing technologies for excreta or faecal sludge Sun, 08 Jan 2017 04:28:42 +0000 Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: AParker http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19979 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19979
Just to note that's its not an MBR process - more similar to pervaporation.]]>
Processing technologies for excreta or faecal sludge Wed, 04 Jan 2017 10:28:38 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: Ecowaters http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19970 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19970
How much energy is used to push the liquid through the membrane?

MBR for wastewater is running into all sorts of challenges in the U.S.]]>
Processing technologies for excreta or faecal sludge Wed, 04 Jan 2017 03:48:30 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: AParker http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19964 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19964
We have been doing experiments on the screw to determine the best charactertistocs to transport the solids but minimise the transport of liquids. This has included changing the taper of the central shaft, makig the flights closer together near the top of the screw, and changing the rotation speed. the results are described in this recently published, free-to-access paper:

Mercer, E., P. Cruddas , L. Williams , A. Kolios , A. Parker , S. Tyrrel , E. Cartmell , M. Pidou and E. J. McAdam (2016) Selection of screw characteristics and operational boundary conditions to facilitate post-flush urine and faeces separation within single household sanitation systems, Environ. Sci.: Water Res. Technol., 2, 953-964]]>
Processing technologies for excreta or faecal sludge Tue, 03 Jan 2017 16:18:42 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: AParker http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19871 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19871
The work is described in detail in a paper in the Journal of Membrane Science, which is free to download:

Yang, C.Y., E. Mercer, F. Kamranvand, L. Williams, A. Kolios, A. Parker, S. Tyrrel, E. Cartmell, E.J. McAdam Tube-side mass transfer forhollow fibre membrane contactors operated in the low Graetz range, Journal of Membrane Science 523, 235–246]]>
Processing technologies for excreta or faecal sludge Tue, 20 Dec 2016 12:30:54 +0000
Re: Excreta valorization by pyrolysis - any supplier making small scale device for a toilet development? - by: muench http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/19398-excreta-valorization-by-pyrolysis-any-supplier-making-small-scale-device-for-a-toilet-development#19816 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/19398-excreta-valorization-by-pyrolysis-any-supplier-making-small-scale-device-for-a-toilet-development#19816
I've noticed that your question from October has not yielded any responses yet. Perhaps you can clarify a bit better why and what you are asking, and which other sanitation pyrolysis projects you have already looked at.

I know that pyrolysis as a possible technology has popped up from time to time here on the Forum. You can find previous threads by putting "pyrolysis" into the search filed at the top right. Have you already tried that?

I found e.g. these ones:
forum.susana.org/forum/categories/53-fae...is-for-sewage-sludge

www.forum.susana.org/forum/categories/99...-via-solar-pyrolysis

forum.susana.org/component/kunena/169-pr...imit=12&start=12

Then I also looked in the SuSanA project database and found these four which had been funded by the Gates Foundation:

www.susana.org/en/resources/projects?search=pyrolysis

(although very limited, or in some cases even no further information is available in our database which is a pity)

If any of those examples are of relevance to your work, how about you ask further questions in those existing threads? Or put more information here, too.

Hope this is useful for you.

Regards,
Elisabeth]]>
Processing technologies for excreta or faecal sludge Tue, 13 Dec 2016 23:14:02 +0000
Looking for a contact for training in safe management of sanitation in Latin America - by: kurich http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/19808-looking-for-a-contact-for-training-in-safe-management-of-sanitation-in-latin-america#19808 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/19808-looking-for-a-contact-for-training-in-safe-management-of-sanitation-in-latin-america#19808
We are looking for someone with expertise in safe management of sanitation who might be able to provide some training for our WASH staff in Latin America. We would ideally need someone who could speak Spanish. Does anyone have any recommendations?

Kindly,
Kristie Urich
World Vision International]]>
Processing technologies for excreta or faecal sludge Mon, 12 Dec 2016 23:50:52 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: AParker http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19746 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19746
The compounds that are rejected by the membrane will flow back into the main holding chamber. The water will be clean enough to use in the house. No liquids are removed by the technicians.

The membrabes are green on this diagram at the bottom right of our home page:
www.nanomembranetoilet.org/]]>
Processing technologies for excreta or faecal sludge Tue, 06 Dec 2016 17:11:12 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: canaday http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19741 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19741
I would say that all of my suggestions for using the ashes would be feasible, especially handwashing ... and this would make your sanitation system all the more complete. If the users want to do something big with the ashes, they can store it up and ask their neighbors to give them more ashes. The last thing we should do is to tell the users to put a resource in the garbage.

What will happen to the liquids that get taken out of the toilets by the technicians?

I still do not understand where the nanomembrane is?

Best wishes,
Chris Canaday]]>
Processing technologies for excreta or faecal sludge Tue, 06 Dec 2016 12:31:02 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - latest results and publications in 2016 - by: AParker http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19735 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19735
Prince and Orchha - We're still in the development stage but I hope we'd be able to brign it to Kenya, Uganda and India in the future.

Chris -
Thanks for your suggestions. At the moment we're focussed on getting the combustion working effectively, rather than the reuse of the ash. The amount generated will just be a few grammes a day in each household - which of your suggestions would work at that scale?

The liquids will pass over a weir and drain into a small chamber where the membranes are. They will be replaced by the service technician once every 3 months. The used filters will be taken bach to base, regenerated and sent out to another customer.

We're still in an early stage of development, but obviously cost minimisation and reliability are high on our agenda.

Happy to answer any other questions!]]>
Processing technologies for excreta or faecal sludge Tue, 06 Dec 2016 10:09:59 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - new phase of funding until Jan. 2016 - by: Orchha http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19655 http://forum.susana.org/component/kunena/105-processing-technologies-for-excreta-or-faecal-sludge/16569-the-nano-membrane-toilet-cranfield-university-uk-latest-results-and-publications-in-2016?limit=12&start=12#19655 www.orchha.org and www.greenhillsalmora.org]]> Processing technologies for excreta or faecal sludge Sat, 26 Nov 2016 13:15:33 +0000