SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Thu, 19 Jan 2017 06:40:34 +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: Time taken for faecal sludge tankers to discharge? - by: Reetu http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20152 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20152
Just wanted to add, unloading was made by the gravity flow as there is no control valve at the outlet.

Kind regards
Reetu]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 18 Jan 2017 09:31:59 +0000
Re: Vacuum truck, vacuum tanker - what is it? Simple definition for lay people? - by: JKMakowka http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/19578-vacuum-truck-vacuum-tanker-what-is-it-simple-definition-for-lay-people-reading-on-wikipedia#20151 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/19578-vacuum-truck-vacuum-tanker-what-is-it-simple-definition-for-lay-people-reading-on-wikipedia#20151 muench wrote:

Could you please help me by telling me what I should write there for:
  • Maybe a sentence on the maximum typical lift (and related maximum length of suction hose) could be included as that seems to be a practical question that comes up now and then?
  • The pump capability (height and distance limits) would certainly be good information to include



I made some small additions and changes to the article, however I came to realize that explaining the above in the detail necessary (type of pump, strength of vacuum, type & size of suction hoses used etc.) would probably be outside of the scope of this article.]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 18 Jan 2017 09:14:14 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: kevintayler http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20150 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20150
Your information is useful. It confirms what has become clear from other people's information that it takes longer to discharge than suggested by theoretical calculations based on orifice theory. This may be partly due to the point already made by Shaji that the operators do not always open the valve fully to avoid splashing. I think it means that I will remove the theoretical graph from the book, give some typical discharge times based on information received from you and other people and emphasise the need to design inlet facilities using recorded discharge times

Thanks again
Kevin]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 18 Jan 2017 07:13:46 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: Reetu http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20149 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20149 This is late now but just wanted to share unloading time in context of Nepal.
We, Environment and Public Heath Organization (ENPHO), had done questionnaire survey with the sludge emptier of Kathamndu valley, capital city of Nepal, and also recorded the time of unloading by ourselves. According to them and from our experience, it takes 7 to 10 minutes to unload 4000 liters of fecal sludge(FS)from 6 inches diameter outlet hose depending upon the proportion of solid and liquid matter in it.

Looking forward for your publication.

Reetu]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 18 Jan 2017 04:33:58 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: kevintayler http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20130 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20130
I am going to be in India for a workshop on FSM next week (Dehrahdun) so will follow up with people at the workshop. The point you make is an important one

Kevin]]>
Faecal sludge transport (including emptying of pits and septic tanks) Mon, 16 Jan 2017 16:18:53 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: shaji http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20129 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#20129
Looking forward for you publication.

The rate of discharge of septage from the truck also depends where material is being dumped. If it is a drain the truckers happily discharge at the maximum rate while when ever they are asked to discharge into a specific pit they take enough time to ensure that there is no splashing. As the regulations are becoming more stringent over the period and with increased awareness among the trucker community the time taken for discharge is also increasing.]]>
Faecal sludge transport (including emptying of pits and septic tanks) Mon, 16 Jan 2017 16:13:15 +0000
Re: Vacuum truck, vacuum tanker - what is it? Simple definition for lay people? - by: muench http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/19578-vacuum-truck-vacuum-tanker-what-is-it-simple-definition-for-lay-people-reading-on-wikipedia#20092 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/19578-vacuum-truck-vacuum-tanker-what-is-it-simple-definition-for-lay-people-reading-on-wikipedia#20092
Thanks for your responses to my question about the vacuum truck article on Wikipedia. I have taken your suggestions on board and modified the article accordingly, please see here:
en.wikipedia.org/wiki/Vacuum_truck

The lead section still needs to be built up again (as it's the lead section that is shown in Google's search results box, and which first gets translated into other languages)

Could you please help me by telling me what I should write there for:
  • Maybe a sentence on the maximum typical lift (and related maximum length of suction hose) could be included as that seems to be a practical question that comes up now and then?
  • The pump capability (height and distance limits) would certainly be good information to include

Andrew: please check if all the important industrial uses for vacuum tanks are now well covered in the article?

Note there are also related articles:
Suction excavator: en.wikipedia.org/wiki/Suction_excavator
Gully excavator: en.wikipedia.org/wiki/Gully_emptier

There seems to be quite a few similar vehicles around.

Regards,
Elisabeth]]>
Faecal sludge transport (including emptying of pits and septic tanks) Thu, 12 Jan 2017 21:36:30 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: kevintayler http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19873 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19873
There is not a specific chapter in the book on climate change but I will be trying to say something about the benefits of technologies that reduce climate impacts.

Thanks for the holiday wishes

Kevin]]>
Faecal sludge transport (including emptying of pits and septic tanks) Tue, 20 Dec 2016 21:19:21 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: F H Mughal http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19852 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19852
Thank you for the background information, regarding your publication. It was helpful and interesting. Yes, I would be delighted to receive a copy for review.

I have a small suggestion. I think, it would be extremely beneficial, if you kindly add a chapter on climate change impacts on FSM, and how to adapt and build resilience. That is an important aspect for people in the South, and even from London's point of view.

I, too, noticed that you have been not quite active these days - now I know why!

Enjoy your upcoming holidays!

Regards,

F H Mughal]]>
Faecal sludge transport (including emptying of pits and septic tanks) Sun, 18 Dec 2016 14:36:01 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: kevintayler http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19851 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19851
The book is to be published by Practical Action Publications. The World Bank and the Gates Foundation are providing some funding for the publication and I think that this will be used to make it reasonably freely available. I have not got the contract yet but I am sure that the copyright will be with the publisher so the availability of the final version will be up to them. However, I think that it is going to be possible to make electronic copies available, at least to people in 'the South'. I am due to finish the first draft by the end of the first week in January and it will then go out for comment from reviewers with the intention that I get comments back by say mid-February and aim to complete the final draft in March. I can send you a copy of the draft for review - it would be good to get comments back from you and others on the forum. I can email material once it is ready.

I am afraid that I have not been very active on the forum lately - mainly because the book is taking up a lot of my time

Regards
Kevin]]>
Faecal sludge transport (including emptying of pits and septic tanks) Sun, 18 Dec 2016 14:20:23 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: F H Mughal http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19849 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19849
I'll be looking forward to your publication on faecal sludge treatment. I assume, you will share your publication on this forum.

To have a broader scope, it might be appropriate if you title your publication as: Faecal Sludge Management and Treatment. What do you think?

Regards,

F H Mughal]]>
Faecal sludge transport (including emptying of pits and septic tanks) Sun, 18 Dec 2016 06:39:01 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: kevintayler http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19822 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19822
In response to Elisabeth's question about 'pressure off' I think that Andrew is referring to whether or not the vacuum tanker operators use the pump on the vehicle when discharging. The 'pressure off' option is when the septage is discharged by gravity.

Overall, the responses suggest that discharge times are rather longer than suggested by my calculations based on orifice theory.

I am currently working on finalising the first draft of my book - the draft is due by the end of this month. Elisabeth, after that I will be able to find some time to update the Wikipedia page.

Regards
Kevin]]>
Faecal sludge transport (including emptying of pits and septic tanks) Wed, 14 Dec 2016 07:37:51 +0000
Re: Time taken for faecal sludge tankers to discharge? - by: muench http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19815 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/18932-time-taken-for-faecal-sludge-tankers-to-discharge?limit=12&start=12#19815 (note to Forum novices: This discussion thread has two pages of discussion so far. Access the previous page by using the buttons at the end of this page)


Dear Andrew,

Just a small clarification question, what do you mean by:
Time to discharge depends on whether or not you can pressure off. If you pressure off you can dump in about 10 minutes.

What does "pressure off" in this context mean? Does it mean to pump? And what determines if you can pump or not?

Regards,
Elisabeth

P.S. It would be nice if someone would take the information provided in this thread and use it to update the Wikipedia page on vaccum trucks (en.wikipedia.org/wiki/Vacuum_truck) and on fecal sludge (en.wikipedia.org/wiki/Fecal_sludge_management). This way, we and others would have it handy & at our fingertips next time that we need it.
Any volunteers? I could help but would like to do it together with someone else.]]>
Faecal sludge transport (including emptying of pits and septic tanks) Tue, 13 Dec 2016 22:55:12 +0000
Research update and next steps (four phases of design and testing for the modified Gulper in Mzuzu, Malawi) - by: willychipeta http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/10663-modified-treadle-pump-pit-pump-prototype-peddle-powered-gulper-modification-malawi?limit=12&start=12#19648 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/10663-modified-treadle-pump-pit-pump-prototype-peddle-powered-gulper-modification-malawi?limit=12&start=12#19648
We have wrapped up four phases of design and testing for the modified Gulper here in Mzuzu, Malawi. Major findings included that it was difficult to make it low cost as our targets, and still be able to pump sludge with a high volume of trash. I am currently wrapping up the MSc in Sanitation Degree at Mzuzu University.

The intellectual property developed under the project and any possible revenue distribution is covered under the Water Research Commission policy of our project.

We are working on a publication outlining our design and testing approach. We will post is on the forum when it is available. If you are interested in continuing work on the low cost pit latrine emptying technology, please drop us a note offline.

Warm regards,

Willy Chipeta.]]>
Faecal sludge transport (including emptying of pits and septic tanks) Fri, 25 Nov 2016 12:10:14 +0000
Re: Vacuum truck, vacuum tanker - what is it? Simple definition for lay people? - by: awhitesell http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/19578-vacuum-truck-vacuum-tanker-what-is-it-simple-definition-for-lay-people-reading-on-wikipedia#19621 http://forum.susana.org/component/kunena/99-faecal-sludge-transport-including-emptying-of-pits-and-septic-tanks/19578-vacuum-truck-vacuum-tanker-what-is-it-simple-definition-for-lay-people-reading-on-wikipedia#19621
I think the description shouldn't be limited to fecal sludge pumping. The trucks are used for a variety of industrial application.

The pump capability (height and distance limits) would certainly be good information to include.

Cheers,

Andrew]]>
Faecal sludge transport (including emptying of pits and septic tanks) Tue, 22 Nov 2016 07:09:48 +0000