SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Thu, 27 Nov 2014 13:06:48 +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: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: muench http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10966 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10966
Thanks for these explanations. Very interesting.
Could you also post some photos of these installations in Swedish schools? How many Swedish schools have these toilets and what is their motivation (are they perhaps in remote rural areas and not connected to a sewer system?)?

Are the school caretakers (janitors) or maintenance staff OK with dealing with the compost? That's very progressive! I don't know if German care takers could be convinced.

Do you have any photos of the maintenance tasks? Are there any requirements by the Swedish legislator to prove that the compost is safe enough to use in school gardens? Then again, only a few litres of compost per year from an entire school is not a lot.

And I think you missed this question of mine: Is the hydrocyclone separator patented by your company? (i.e. would someone like AIT not be allowed to also apply this design, too?)

Regards,
Elisabeth

P.S. I have alerted Thammarat to this thread by e-mail.
P.P.S. It might be a good idea to split off the last few posts and put them in a new thread?]]>
Processing technologies for excreta or faecal sludge Thu, 13 Nov 2014 09:08:45 +0000
Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: aquatron http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10857 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10857
One of our retailers gave me this link to your forum.

The Aquatron separator was invented in Sweden by an engineer at IBM during the 80s, the first working systems were manufactured and installed in the beginning of the 90s.
In the end of the 90s there was a lot of big systems installed in public schools. The biggest one had 4 Aquatron systems that served 800 students, this system was up and running for over 15 years. With the Aquatron system the architect installed urine diverting toilets, the urine was collected in big tanks and local farmers used this for irrigation. Unfortunately, later on, more very young students (4-5 years old) was added to the school and the usage of the urine diverting toilets was too difficult to them. The direction of the school disconnected the toilets and the Aquatrons with them (even though they never had problems with the Aquatron systems)...
Today our best reference in Sweden is a school in Lund where 200 students use one Aquatron system since 1997.

Aquatron has changed owner and manufacturer during the years, and we estimate that over 10 000 systems been manufactured over the years (there is no record).

Our main sales is in Scandinavia, but we have clients all over Europe, Belize, USA, New Zealand, Australia and India. Of course we have some private persons that ordered systems and we don't know where in the world it's installed.

The cost on the Aquatron systems depends on the demands, but the prices estimated in Euros is from 1500€ and up included the composting chamber.

The maintenance cost is very low since most of our clients serve their own systems and the only part that needs to be maintained or served is the wire ring in the separator.
The schools only empty a few liter per year of compost.]]>
Processing technologies for excreta or faecal sludge Wed, 05 Nov 2014 16:29:07 +0000
Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: F H Mughal http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10851 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10851
Thank you for your message. Yes, I think, this is, probably, the case of "2 thinkers, one thought."

Regards,

F H Mughal]]>
Processing technologies for excreta or faecal sludge Wed, 05 Nov 2014 10:56:36 +0000
Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: christoph http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10836 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10836 when daniel posted the video I remembered that I had a look at their page some years ago. They have quite a good description as well
http://www.aquatron.se/start/

Interesting solution. Seems to be the second time that a solution of reinvent the toilet is "reinvented". I don´t know if it is a copy or just "2 thinkers, one thought" as many times with good products.

Here is the picture of the product.



Yours
Christoph]]>
Processing technologies for excreta or faecal sludge Wed, 05 Nov 2014 00:09:16 +0000
Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: F H Mughal http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10830 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10830
Thank you for your help. I appreciate

Regards,

F H Mughal]]>
Processing technologies for excreta or faecal sludge Tue, 04 Nov 2014 16:20:34 +0000
Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: muench http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10821 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10821 Processing technologies for excreta or faecal sludge Tue, 04 Nov 2014 12:05:16 +0000 Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: F H Mughal http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10819 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10819
I'm also looking forward to Thammarat's reply.

F H Mughal]]>
Processing technologies for excreta or faecal sludge Tue, 04 Nov 2014 10:37:08 +0000
Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: muench http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10818 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10818
Thanks for your post. How did you find out about this forum?
I am looking forward to Thammarat's reply. Perhaps he never said that the hydrocyclone separator was his idea but perhaps the novel part is its new field of application? I am not sure. Is the hydrocyclone separator patented by your company?

I liked the video that you posted which shows how the flush toilets can be connected to a composting chamber with the help of this hydrocyclone principle which keeps most of the liquid out.

Could you please tell us:
  1. How many of these toilets has your company sold?
  2. For which applications are they mainly used and in which countries?
  3. How much does one of these toilets cost?
  4. How much maintenance costs should one expect?
  5. Is the compost dealt with by the toilet owner or are there also schemes for municipal collection of the compost?

Thanks.

Regards,
Elisabeth


* I think people sometimes don't know where I get the name of the person from: You just click on the user name above his photo, this takes you to the full name of the person who posted (when you are logged in).]]>
Processing technologies for excreta or faecal sludge Tue, 04 Nov 2014 10:27:50 +0000
Re: Sustainable Decentralized Wastewater Management in Developing Countries (AIT, Thailand) - by: aquatron http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10809 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4750-sustainable-decentralized-wastewater-management-in-developing-countries-ait-thailand?limit=12&start=12#10809
I'm quite surprised to see an new invention that is a copy of our over 30 years old product...
You can find an old video on the Aquatron separator here:
]]>
Processing technologies for excreta or faecal sludge Mon, 03 Nov 2014 16:11:21 +0000
Re: Vortex bioreactors for the processing of contaminated wastewater (Plymouth Marine Laboratory, UK) - by: mikeallen http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4152-vortex-bioreactors-for-the-processing-of-contaminated-wastewater-plymouth-marine-laboratory-uk#10606 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/4152-vortex-bioreactors-for-the-processing-of-contaminated-wastewater-plymouth-marine-laboratory-uk#10606
As our 12 month project draws to a close, I thought I'd update you on progress.

Firstly, we've published the first part of the work describing the alginate beads and their bactericidal activity.
You can check out the paper here:
www.plosone.org/article/info%3Adoi%2F10....journal.pone.0096225

There's another manuscript on the bioreactor itself currently undergoing revisions at Journal of Water Process Engineering.

There's a second manuscript under review at PLoSOne on comparing the bioreactor with UV.

And a third manuscript describing the results from our field trials is currently under review at Nature Science Communications.

In the end we managed to get our reactors to:
Chris Buckley's group in South Africa.
Andrew Whitesell's group at Cascade Designs in Seattle.
Bincy Baby at Eram Scientific in Kerala, India.
Christoph Platzer in South America.
And Ajeet Oak in Pune, India. We visited Ajeet's site for a week, earlier in the year to do our own field testing. It worked really well, we were all really happy with the performance of the system. The beads are letting us down a little, but we always knew they would need proper development in the future. The feedback on performance from partners has been really useful to us (Ajeet and Andrew's team are co-authors on the field work manuscript), and hopefully in the future we'll be able to go back to the partners with an updated and improved active agent.

That's all for now!
Cheers
Mike]]>
Processing technologies for excreta or faecal sludge Mon, 20 Oct 2014 13:23:56 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - by: AParker http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#10260 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#10260
In our latest conversations with BMGF they really liked our small footprint aspirational concept:

1.bp.blogspot.com/-DfAaT4p68uI/U58oK4X1U.../20140609_102615.jpg

But they didn't like our plan to collect the solids weekly. So they suggested we pair with another grantee who could help us process the solids in the toilet, hence the link to RTI. With onsite solids processing there's no need for the coating so we're not taking this any further. We'll need to work hard to keep is both safe and cheap. It will operate as a batch process. So we'll automate it to operate when it's not being used. And we're going to gauge responses from households in Ghana about how they feel about having such a unit in their homes, as well as feedback from, RTI's ongoing field trial in India:

abettertoilet.org/field-work/

Hope that answers your question, do keep asking them!

Alison]]>
Processing technologies for excreta or faecal sludge Mon, 22 Sep 2014 13:53:30 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - by: muench http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#10258 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#10258
Congratulations on receiving this next phase of funding! That's great news for you and your team!

Can you tell us the size of this new grant (it is not yet visible in the BMGF grant database)?

And I read on your blog:
The biggest change is that rather than coating the dried solids, we're now looking to combust them in the toilet using a gasifier - we'll be working with RTI * who are already testing their gasifier in India. This changes the energy balance of the toilet, for example we can now consider recovering the water using a heat exchanger instead of the beads, and we won't have to use the bicycle power generator or hand crank to power the membrane processes.

* The RTI project is described here on the forum: forum.susana.org/forum/categories/105-pr...tional-usa-and-india

Could you tell us a bit more why you abandoned the coating and bead ideas?
And are you going to try and embed the gasifier in your small toilet model? I would find that a bit scary to be sitting on something that operates at high heat and with combustion... Would a unit like that really make sense at household level with all the associated safety issues? And wouldn't it increase the costs a lot?

Regards,
Elisabeth]]>
Processing technologies for excreta or faecal sludge Mon, 22 Sep 2014 12:33:15 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - by: AParker http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#10245 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#10245 [Start of Page 4 of the discussion]


We are delighted to announce that the Nano Membrane Toilet has received further funding from the Bill and Melinda Gates Foundation to continue the development of the toilet. This next phase will take us to January 2016 when we will have a prototype ready for field testing. We're really excited to be starting work again after a 6 month break.

Read more about our plans on our blog:
nanomembranetoilet.blogspot.co.uk/2014/0...toilet-receives.html

As ever, happy to answer your questions and receive your feedback on this forum.]]>
Processing technologies for excreta or faecal sludge Fri, 19 Sep 2014 15:35:48 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - by: AParker http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#8792 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#8792
The exhibition is open to the public so anyone can come to visit, but I appreciate that the average Londoner probably isn't our target user! BMGF don't want us to do full scale field trials yet, but we hope to gain a lot more user perspectives in our next phase of work. I can't publish our full plans yet as they are still under discussion but I'll keep you updated. If there's any aspect you think we should be specifically seeking user feedback on I'd welcome your input.

Alison]]>
Processing technologies for excreta or faecal sludge Fri, 30 May 2014 10:26:58 +0000
Re: The Nano Membrane Toilet (Cranfield University, UK) - by: canaday http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#8791 http://forum.susana.org/forum/categories/105-processing-technologies-for-excreta-or-faecal-sludge/3409-the-nano-membrane-toilet-cranfield-university-uk-new-phase-of-funding-until-jan-2016?limit=12&start=36#8791
Congrats on this event. It is great to get the word out.

You say "We’ll have all our prototypes so plenty of chance to try them out" and then you say "And you can even sit on our toilet!", which seem to contradict each other a bit. Optimally, all the users who like should be able to use the toilet and see what the user experience is like. Any chance of that?

Good luck with the exhibition,
Chris Canaday]]>
Processing technologies for excreta or faecal sludge Fri, 30 May 2014 10:20:21 +0000