SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Fri, 29 May 2015 08:11:07 +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: Breathable membrane enclosures for fecal sludge stabilization (University of Delaware, USA) - by: muench http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#13366 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#13366 ):

youtu.be/XutfOZSdK10?t=17m26s

Or go to time 17m26 s here:



The question and answer session starts at 27:28.]]>
User interface technology innovations Mon, 18 May 2015 10:32:03 +0000
Re: The Earth Auger Toilet: Innovation in Waterless Sanitation (Fundacion In Terris, Ecuador) - by: chuckhenry http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13346 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13346
And we've come a long ways since RTTF India! Especially with our newly developed community system.]]>
User interface technology innovations Fri, 15 May 2015 05:04:02 +0000
Re: The Earth Auger Toilet: urine-diverting composting toilet (Fundacion In Terris, Ecuador) - updates on progress - by: vishwanathdalvi http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13344 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13344 Thanks you very much!
With kind regards,
Vishwanath]]>
User interface technology innovations Fri, 15 May 2015 03:13:59 +0000
Re: The Earth Auger Toilet: Innovation in Waterless Sanitation (Fundacion In Terris, Ecuador) - by: vishwanathdalvi http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13343 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13343
I remember visiting your stall at the Toilet Fair in New Delhi. Very impressive.

Kind regards,

Vishwanath]]>
User interface technology innovations Fri, 15 May 2015 03:12:09 +0000
Re: The Earth Auger Toilet: urine-diverting composting toilet (Fundacion In Terris, Ecuador) - updates on progress - by: chuckhenry http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13282 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13282 User interface technology innovations Sun, 10 May 2015 17:07:18 +0000 Re: The Earth Auger Toilet: urine-diverting composting toilet (Fundacion In Terris, Ecuador) - updates on progress - by: vishwanathdalvi http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13280 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13280
Thanks for this. What is the bed material? Is it soil?

Kind regards,
Vishwanath]]>
User interface technology innovations Sun, 10 May 2015 16:08:45 +0000
Re: The Earth Auger Toilet: urine-diverting composting toilet (Fundacion In Terris, Ecuador) - updates on progress - by: chuckhenry http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13279 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13279
Thanks!

The EA-X (Critical Practices 10th generation over the last 14 years of development!) is currently made mostly of injection molded polypropylene. The horizontal pipe is currently PVC irrigation pipe, but we'll start extrusion molding that soon as well. Then, of course, there are the screws, bolts, etc. For corrosion resistance as many of these are stainless steel as possible.]]>
User interface technology innovations Sun, 10 May 2015 14:10:42 +0000
Re: The Earth Auger Toilet: urine-diverting composting toilet (Fundacion In Terris, Ecuador) - updates on progress - by: vishwanathdalvi http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13277 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13277
I really like the work you have done and shared so generously. Could you share what particulate materials you used in the toilet?
Thanks!
Vishwanath]]>
User interface technology innovations Sun, 10 May 2015 13:32:35 +0000
The Earth Auger Toilet: urine-diverting composting toilet (Fundacion In Terris, Ecuador) - updates on progress - by: muench http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13250 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#13250 youtu.be/TLFq4yaxxvg?t=52m14s

Or fast forward to time: 52 min. 14 s here:

]]>
User interface technology innovations Fri, 08 May 2015 10:27:58 +0000
Re: Breathable membrane enclosures for fecal sludge stabilization (University of Delaware, USA) - by: shraysaxena88 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#12940 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#12940
The dry crust formation is an indication of absence of free water. The sludge crust will hence, not be a problem until the very end of the drying cycle. I would also point out that continuous stirring will definitely help in removing the deposits which do settle down due to sedimentation. But in a field situation such deposits will offer resistance to the drying rates and hence lab results should provide a good substitute for the same.

For your second concern about the actual reduction in water content, I agree that an increase in 0.5 months is not much over an impermeable container. For this particular reason we have replacement drums which will allow the fully filled sludge drums to dry for 1.5 + 0.5 = 2 months. That, given certain hot and dry climates could be a sustainable model for these Eco-Vapor toilets.
I hope this helps.]]>
User interface technology innovations Thu, 16 Apr 2015 21:10:56 +0000
Re: Breathable membrane enclosures for fecal sludge stabilization (University of Delaware, USA) - by: JKMakowka http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#12893 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#12893
Did I understand the "wetted surface area" slide correctly, that after a while a dry crust forms close to the membrane, that slows the drying of the more interior fecal sludge? And ideas how the sludge could be stirred before that happens?

I am also a bit dubious about the conclusions based on the "current progress" slide... volumes without measuring the actual water content can't really measure the effectiveness of the membrane because you only estimate what went in. And even if your assumption is correct, the actual reduction in water content seems not all that high, i.e. at the current size of the drum you would have to empty it every month without the membrane and maybe every 1.5 months with?]]>
User interface technology innovations Tue, 14 Apr 2015 16:29:01 +0000
Re: Breathable membrane enclosures for fecal sludge stabilization (University of Delaware, USA) - by: shraysaxena88 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#12892 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4890-breathable-membrane-enclosures-for-fecal-sludge-stabilization-university-of-delaware-usa?limit=12&start=36#12892 To summarize, in this project we use a breathable membrane for the dewatering of fecal sludge and containment of pathogens as the sludge dries due to the partial pressure difference between the inside and outside the membrane bags. This partial pressure difference is created due to the temperature difference or the humidity difference (wet sludge is 100% humid).
Recently, we started field trials of these membrane bags in Kanpur, India where we provided two toilets to 2 households in urban slum areas. These bags line the inside of a perforated 55-Gallon drum which will act as the storage for fecal matter from active toilet users. This perforated drum is housed on the roof of the house in a honeycombed wall chamber surrounding it. The toilet seat is housed in the superstructure above the drum and the connection is a funnel shaped sheet metal design. The toilet seat used is a locally made squatting type seat based on the SATO pan design. This particular design contains a counter-weighted trapdoor through which any solid or liquid passes through due to its weight. It has been shown that this SATO pan design reduces the amount of flush water used in a toilet. It should also be noted that all connections between the toilet seat and the drum is air tight and no odors are expected to escape back into the superstructure.
In addition, the drum is placed on a wheeled platform which makes the replacement of a fully sludge filled bag easy to maneuver. We also provide a replacement drum and membrane so that the toilet does not go out of commission once the active drum is full. This supplementary drum also provides a good amount of waiting period for the fully sludge filled drum before the replaced drum fills up, hence more drying time for the full drum. Each drum also has a seep hole in the bottom connected to a pipe which runs through the nearest drain, so that in case of leakages the users’ house is not contaminated.
Since, this is a pilot research study, we have limited the number of uses to 4 per day which includes 1 liter/use of wash water. We are regularly monitoring these toilets on a weekly basis through our collaborators WaterAid India and Shramik Bharti.
Currently, we see that one 55 Gallon drum gets full in approximately 50 days of regular usage under the winter conditions of Kanpur. We hope that in the summer months (June-July), the filling rate and drying rate will reach an equilibrium.
Please find attached two presentations:
1) Fecal Sludge Management 3 conference
2) Graduate Seminar at University of Delaware. Spring 2015.]]>
User interface technology innovations Tue, 14 Apr 2015 14:58:10 +0000
Re: Much improved Wikipedia page on composting toilets - by: chuckhenry http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#12743 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#12743 User interface technology innovations Sun, 05 Apr 2015 17:12:45 +0000 Re: Much improved Wikipedia page on composting toilets - by: ben http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#12742 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#12742
This is great to see your progresses, your new model and the low prices you managed to reach. Congratulation, I've been following you for a while and you showed that innovation is a long path. Looking forward to see how they're perceived outside ecuador.

Just for curiosity, are you working on some decentralized production, mean a way to ship molds and technical guides rather than actual products from china. Chinese production could spread all over asia and pacific for cheap though. Would local production everywhere be the next step of your development or the price difference will make it cheaper from china for a long time still ?

Wish you best of luck in your prospects, and thanks for sharing all the updates.

Ben]]>
User interface technology innovations Sun, 05 Apr 2015 16:58:41 +0000
Re: Much improved Wikipedia page on composting toilets - by: chuckhenry http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#12727 http://forum.susana.org/forum/categories/106-user-interface-technology-innovations/4079-the-earth-auger-toilet-urine-diverting-composting-toilet-fundacion-in-terris-ecuador-updates-on-progress?limit=12&start=48#12727 100-499 units $150USD
500-999 units $125USD
1000+ units $110USD

This is based on complete kits for the current model, with reductions of price achievable by reductions of production and handling costs with higher quantities.]]>
User interface technology innovations Fri, 03 Apr 2015 14:49:54 +0000