SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Sun, 28 Aug 2016 14:06:41 +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: Sludge Dipping Tools Recently Developed - by: dandreatta http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18515-sludge-dipping-tools-recently-developed#18850 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18515-sludge-dipping-tools-recently-developed#18850
The original post described 4 variations of a device I've developed for emptying pit latrines and septic tanks. They are bucket-based, and should be able to handle trash in the pit in most cases. A video and .pdf document are available with the original post.

Check out the thread to see the original post.

Thanks,

Dale Andreatta]]>
Faecal sludge transport (including emptying of pits and septic tanks) Fri, 26 Aug 2016 19:27:26 +0000
Sludge Dipping Tools Recently Developed - by: dandreatta http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18515-sludge-dipping-tools-recently-developed#18515 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18515-sludge-dipping-tools-recently-developed#18515


If the video is not available or can't be downloaded, I've attached a document with some still pictures showing the general ideas.



Dale Andreatta]]>
Faecal sludge transport (including emptying of pits and septic tanks) Fri, 29 Jul 2016 19:32:46 +0000
Fecal Sludge Management and Pit Emptying (Mzuzu, Malawi) - by: dandreatta http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/15617-the-sludge-digger-a-device-ive-developed-for-emptying-pit-latrines-septic-tanks-and-similar-tanks-new-video#17629 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/15617-the-sludge-digger-a-device-ive-developed-for-emptying-pit-latrines-septic-tanks-and-similar-tanks-new-video#17629
I wanted to do a few more tests before responding to your second question.

If working under a ceiling, if the pit depth is only a little greater than the ceiling height (and therefore the handle length is a little greater than the ceiling height) it is possible to angle the handle so that it doesn't hit the ceiling. You need to hold the handle and the rope in just the right way, but this is easy to figure out. To dump the bucket you would need to go outside so that you can lift the bucket and the handle, but hopefully the room is only small and it's only a couple steps to the outside.

If the pit is much deeper than the ceiling height, then you can use a 2-piece hinged handle as seen in my youtube video. In that situation I was working over a railing and it was very slow, but with no railing and a little practice, it would be much faster.

Regarding your first question, the intention in not to have the bucket fit down through the squatting hole. Typically, the bucket will be about 22 cm, and the handle adds a couple cm, so the hole needs to be about 24 cm. My intention is to keep men from going down into pits, so any hole into which they could go is already more than big enough. Clearly my Sludge Digger is not a universal solution, but should be useful in many places.

I'm currently working on a similar device that is thin enough to go through the squatting hole. I'll post videos when that is done. It will only work for thin sludge.

Regarding your final question, if the sludge is very thick it does take some force to push the digger down into the sludge. The youtube video shows about the thickest (simulated) sludge in which the device will work. Emptying the bucket is not a problem with just turning it upside down. I'm also working on a similar device with more of a digger on the end rather than a bucket.

Thanks for your interest and for the sharp questions,

Dale Andreatta]]>
Faecal sludge transport (including emptying of pits and septic tanks) Mon, 04 Apr 2016 22:20:26 +0000
Re: Develop new innovation for pit latrine emptying in peri-urban Mzuzu (Malawi) - by: hajo http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/15617-the-sludge-digger-a-device-ive-developed-for-emptying-pit-latrines-septic-tanks-and-similar-tanks-new-video#17559 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/15617-the-sludge-digger-a-device-ive-developed-for-emptying-pit-latrines-septic-tanks-and-similar-tanks-new-video#17559
It seems to me that the digger has possibly two limitations of use: a standard squat hole will rarely be big enough to let a 5L (dia 20cm) or even 20 L (dia 30cm) bucket pass through. Thus it requires an extra opening big enough for the bucket. What is the size of your bucket?

And, it will not be possible to extend the handle beyond the inside height of the latrine if you want to dig deeper. This will require that the access hole to the pit is outside of the latrine.

And a question: does the bucket tips over and fills when you ‘dump’ it into relatively thick sludge or do you have to force it down vertically for filling? The latter requires quite some strength and puts lots of force on the structure/bucket.

Looking forward to hear more of your observations and experiences with the digger.

Ciao Hajo]]>
Faecal sludge transport (including emptying of pits and septic tanks) Sun, 27 Mar 2016 08:06:14 +0000
Re: Develop new innovation for pit latrine emptying in peri-urban Mzuzu (Malawi) - by: dandreatta http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/15617-the-sludge-digger-a-device-ive-developed-for-emptying-pit-latrines-septic-tanks-and-similar-tanks-new-video#17557 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/15617-the-sludge-digger-a-device-ive-developed-for-emptying-pit-latrines-septic-tanks-and-similar-tanks-new-video#17557 Note by moderator: this post used to be in this thread about research in Mzuzu, Malawi:
forum.susana.org/forum/categories/99-fae...n-mzuzu-malawi#17559

+++++++++++++

This is not specific to Mzuzu or Freetown, but another manual pit emptying device is the Sludge Digger. It can be seen at



The attached photo shows the latest all-metal version (except for the handle and rope) of the Sludge Digger, which is more slender and more durable than the original that is in the youtube video.

This device is a bucket on a handle, with a pivot and a rope, allowing the pit emptier to work above ground. He can use the same device to lift thick or thin sludge, even with loads of trash in the pit. It was designed to retain the simplicity and low cost of hand tools, but to also be able to handle trash in the sludge and most importantly of all, keep the man out of the pit! With a shallow pit and thin sludge one man with one sludge digger can work at up to 2.2 cubic meters per hour, though under most conditions it would be slower. Two men with two sludge diggers would be a possibility, with even faster speeds. The digger adapts to a range of pit depths, and can be extended by using longer handles.

The Sludge Digger is currently set to be tried in a refugee camp in Myanmar soon, and various field experiments are started in Africa.

Thanks,

Dale Andreatta]]>
Faecal sludge transport (including emptying of pits and septic tanks) Sat, 26 Mar 2016 19:49:17 +0000
Reply: Solutions for pit desludging and sludge management in low income urban settlements in Malawi (Mzuzu University) - and policy issues - by: dandreatta http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/16492-mzuzu-university-centre-of-excellence-malawi-offers-itself-as-a-site-for-field-testing-of-innovative-techniques-for-the-emptying-transport-and-treatment-of-pit-sludge#17523 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/16492-mzuzu-university-centre-of-excellence-malawi-offers-itself-as-a-site-for-field-testing-of-innovative-techniques-for-the-emptying-transport-and-treatment-of-pit-sludge#17523
This e-mail address is being protected from spambots. You need JavaScript enabled to view it <mailto: This e-mail address is being protected from spambots. You need JavaScript enabled to view it >

Thanks,

Dale Andreatta, Ph.D., P.E.]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 23 Mar 2016 18:29:59 +0000
Re: Develop new innovation for pit latrine emptying in peri-urban Mzuzu - by: aoife http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/8330-develop-new-innovation-for-pit-latrine-emptying-in-peri-urban-mzuzu-malawi#17518 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/8330-develop-new-innovation-for-pit-latrine-emptying-in-peri-urban-mzuzu-malawi#17518
I am working for GOAL in Freetown, Sierra Leone, focusing on improving FSM in the city. I am currently conducting a desk review on manual pit emptying equipment with the aim of selecting the most appropriate technologies to use in Freetown.

Are there any updates on the progress of your pit emptying innovations? If you have more information, reports, test results or images I would be very interested to see them.

Cheers,

Aoife]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 23 Mar 2016 10:50:28 +0000
Re: Solicitation for Manual Pump Testing Partners - by: awhitesell http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/16618-solicitation-for-manual-pump-testing-partners#17513 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/16618-solicitation-for-manual-pump-testing-partners#17513
The pump is still in development so there is no documentation to release yet. And while we've done some facility testing, the real lab testing will begin in about 2 months. Around that same time the field testing in Africa and SE Asia.

We received 9 proposals for testing of the pump. Next week, the list of candidates will be given to the WSH team at the foundation and they'll select the partners they deem most appropriate. I'm not sure how long the selection process will take but I'll post the results at that time.

Cheers and thanks for the interest.

Andrew]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 23 Mar 2016 05:29:34 +0000
Re: Solicitation for Manual Pump Testing Partners - by: aoife http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/16618-solicitation-for-manual-pump-testing-partners#17491 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/16618-solicitation-for-manual-pump-testing-partners#17491
Do you have any documentation about the design of the pump or results from laboratory testing? Have you selected partners to trial the pump already?

Cheers,

Aoife]]>
Faecal sludge transport (including emptying of pits and septic tanks) Mon, 21 Mar 2016 11:50:33 +0000
Re: Small Scale FSM at $1 per Family Per Month - Project Concept for Myanmar - by: dandreatta http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17435 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17435
Jamie Radford posted something above that he was going to try to clog my Sludge Digger. If the sludge is VERY thick it won't drop out of the bucket when the bucket is dumped. That's probably the only way to clog a Sludge Digger.

Jamie, I looked carefully at the photographs of sludge of various strengths that you posted a couple weeks ago. As best I can tell, my Sludge Digger will work up to a sludge strength of 2000 Pa. Is there a simple way to test this? I suspect that I might be low in my estimate of 2000 Pa, and if so I'd like to know this. I could probably build a cone penetrometer, but this would take some work. Are there any videos of sludge of various strengths? Can one do some sort of slump test? Is there a relationship between sludge strength and angle of repose?

As an update, I'm working on a version of the Sludge Digger that is all-metal for increased durability (except possibly for the handle and rope). Also, some of the clearances are tightened up for a more solid feel. My colleagues who are metalurgical engineers say that in high Ph lime stabilized sludge ordinary steel (not stainless) should work well. Time and testing will tell.

Dale]]>
Faecal sludge transport (including emptying of pits and septic tanks) Tue, 15 Mar 2016 20:52:02 +0000
Re: Advice Request - Gulper, Excrevator, or eVac for small flow FSM projects in IDP camps in Myanmar - by: RadfordJT http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17313 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17313
Thanks for posting - I'd forgotten about your sludge digger and good to see it's evolved from the earlier prototype I'd seen a year or two ago. I'm also going to follow-up with you offline to get a feel for what testing you've already done, and see if we can get it benchmarked under the same process as the other pumps we've done/are doing. I'm also now itching to try and make it clog - I like a good challenge! Although I agree it's clearly far less likely to than manual pumps with sludge flowing through valves.

I'll be in touch. All the best, Jamie]]>
Faecal sludge transport (including emptying of pits and septic tanks) Fri, 04 Mar 2016 07:00:43 +0000
Re: Advice Request - Gulper, Excrevator, or eVac for small flow FSM projects in IDP camps in Myanmar - by: dmrobbins10 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17306 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17306
I looked at the video of the Sludge Digger, and I think it would work well with our program. I have always thought that there must be some simple bucket system that could alleviate the problem of septage workers entering tanks to desludge them. The Sludge Digger looks like it fits that exact need. Treating the waste in the pit with the lime stabilization process takes out the "yuk" factor, which is the first step in trying to elevate the stature of septage workers from "under class" to people providing a safe and valuable service. The lime also makes it really easy to handle the wet waste once it is removed from the pits, and to properly disperse the biosolids once they are air dried for a few weeks. And of course, since the waste is treated on-site, there is no need for an expensive treatment plant.

I want to take you up on your offer of helping us to procure some Sludge Diggers for our project in Myanmar. I will discuss this with you off line. For now, let me leave you with a video that further describes the In-Pit Lime Stabilization process. This video is by iDE Cambodia who first demonstrated how this age old technology could be applied to difficult to empty pits back in 2013.



Kind regards,

Dave]]>
Faecal sludge transport (including emptying of pits and septic tanks) Thu, 03 Mar 2016 17:47:44 +0000
Re: Advice Request - Gulper, Excrevator, or eVac for small flow FSM projects in IDP camps in Myanmar - by: dmrobbins10 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17305 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17305
forum.susana.org/forum/categories/53-fae...--and-the-answer-is-

The strategy is developed in part through your inputs. Thanks again.

Dave]]>
Faecal sludge transport (including emptying of pits and septic tanks) Thu, 03 Mar 2016 17:24:35 +0000
Re: Advice Request - Gulper, Excrevator, or eVac for small flow FSM projects in IDP camps in Myanmar - by: dandreatta http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17304 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17157-advice-request-gulper-excrevator-or-evac-for-small-flow-fsm-projects-in-idp-camps-in-myanmar#17304
Also please consider using my Sludge Digger design, seen at:



This video was a prototype but you can see its main features. A more final version is seen in the attached still photo, and the manual for building them is also attached. The final version is much sleeker and simpler than the one in the video.

The Sludge Digger is basically a bucket pivoting on a stick, with a rope. It handles thin and thick sludge, and will never clog. As seen in the video, the Sludge Digger easily picks up bottles, diapers, and various other forms of trash.

Under ideal conditions (shallow pit, thin sludge) it will pick up sludge at a rate of 2.2 cubic meters per hour. Most of the time it would be slower, of course, but you could also have two men working in parallel with two sludge diggers, one man dumping his bucket while the other lifts from the pit.

Comparing with the pictures in Jamie Radford's very helpful Visual Guide to Sludge Strength, I would say the sludge digger can handle sludge up to at least 2000 Pa, probably thicker.

It appears that you have a small scale project with three men allocated for clearing pits. Depending on the distance from the pit to your transport vehicle, you could have two men carrying buckets while one man clears the pit, or two men using two sludge diggers and one man carrying buckets if the pit were close to the transport vessel.

I don't know what the price of the sludge digger would be, but it would be virtually nothing compared to all the other technologies being considered. This frees up extra money in your project. If you would like to make some sludge diggers, you may use the attached manual. If you would like me to build one or two sludge diggers and ship them to you, I am willing to do so, at my expense.

Dale Andreatta, Ph.D., P.E.
This e-mail address is being protected from spambots. You need JavaScript enabled to view it ]]>
Faecal sludge transport (including emptying of pits and septic tanks) Thu, 03 Mar 2016 14:37:17 +0000
Re: Achieving sustained environmental health improvements in Freetown, Sierra Leone through faecal sludge management enterprises, Phase 2 (GOAL) - by: Kiku http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17253-achieving-sustained-environmental-health-improvements-in-freetown-sierra-leone-through-faecal-sludge-management-enterprises-phase-2-goal#17282 http://forum.susana.org/forum/categories/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/17253-achieving-sustained-environmental-health-improvements-in-freetown-sierra-leone-through-faecal-sludge-management-enterprises-phase-2-goal#17282
Thanks for the detailed introduction of the Freetown FSM project. There are plenty of similarities with what Kampala has embarked on - with funding from BMGF/DFID as well. You can read more about Kampala via this thread:

forum.susana.org/forum/categories/194-ci...ing-by-bmgf-and-dfid

It would be great to explore learning opportunities between the two cities - as there are plenty of common challenges - including hills and valleys topography:-)

Best,

Fredrick]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 02 Mar 2016 09:55:43 +0000