Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

  • JKMakowka
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Re: Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

If you are dealing with mostly solid nearly fresh feces, co-composting might be the better solution. Specifically pipe-aerated windrow composting (to minimize manual handling) in medium sized plants closer to the campsites might be worth testing.

I also posted a presentation on possible use of ATAD systems, but this hasn't been tested under such conditions: forum.susana.org/280-faecal-sludge-treat...treatment-kits#22225

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  • sahidul93
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Re: Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

Thanks for your suggestions. Actually reuse is difficult here. As the area is big and road communications is not possible due to hilly areas. Small area based decentrlised treatment will be more wise.

Md.Sahidul Islam
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Re: Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

Dear all, it seems that the discussion on Lime Stabilisation (in Philippines) has gained momentum.
Heading the UNICEF WASH Team for Yolanda response 2013-2015 when the lime stabilisation plants for Tacloban were constructed as an emergency option ONLY for bunkhouse and evacuation centres at the peak of the emergency response I would like to refer you to the SUSANA project site providing details on PhATS (Philippines Approach to Total Sanitation in Haiyan affected areas) here at Susana Forum , which provides more details on how the lime stabilisation ponds were set up in two locations as an emergency treatment option and how this links to the overall approach moving from emergency to development within a systems approach to scale up sanitation in partnership with NGOs and government. This set the ground to develop and construct a sophisticated ABR based WWT which is now functional, (to be operated by the City of Tacloban).

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  • dmrobbins10
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Re: Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

Dear Sahid,

Sorry for neglecting to respond to your earlier message. As for the project in Myanmar, I don't know what ever happened with that project. Since we did the initial trials, I have not heard any results. That project was in-pit lime stabilization, which seemed to make sense. Adding the lime to the individual pit, to perform some treatment prior to removal. IDEA Cambodia did some work on this as well, which was the inspiration for the Myanmar project. Perhaps someone with more current information can respond.

As to the sequence, what seems to make the most sense is first dewatering of the fecal sludge to the extent possible. The liquids would flow to liquids treatment such as ABR followed by wetlands, then mixing the concentrated solids with lime. This is the method employed at Tacloban City, Philippines to the best of my knowledge, but I haven't heard any results. Perhaps someone with more knowledge about current activities there could reply.

Good luck with your program and please let us know if you utilize the lime stabilization technology, how it works out.

David M. Robbins
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Re: Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

Dear all,

both publications (1) City of Tacloban Septage Management Plant: Construction Plans and Bill of Quantities (July 2015)
(2) Achieving Total Sanitation, Part I: Emergency Response (September 2015) are now available in SuSanA library. To download, please go to this link .



Regards,
Ainul on behalf of the SuSanA secretariat.

Posted by a member of the SuSanA secretariat held by the GIZ Sustainable sanitation sector program
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  • sahidul93
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Re: Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

Hi Robin,
Nice to hear from you. Here in refugee camps, many organisations are using lime in pit, barrel and in pond for stabilization. But there is no similarities among all of those. NGO forum for Public Health, BRAC, OXFAM, Solidarities, etc. are using lime stabilization system. The amount of using lime differs a lot. That's why I am asking, is there any good graph of using lime at which pH goes upto the desired limit and falls as well.

Thanks a lot.

Sahid

Md.Sahidul Islam
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  • dmrobbins10
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Re: Implementer's Guide to Lime Stabilization for Septage Management in the Philippines

Hi Sahid,

Nice to know that the technology is being used. I don't know of any type of graph as you suggest. One reason is that there are different qualities of hydrated lime. Also I would think that the concentration of organic matter in the waste would have an impact as well on the quantity of hydrated lime required to achieve the desired results. For that reason, I think small scale trials are useful for judging how much lime to add for a particular situation. Perhaps some of the other readers may know of some graph that could be used for this purpose. One suggestion though would be to make sure that it is hydrated lime (calcium hydroxide) that is being used and not agricultural lime (calcium carbonate).

Good luck and please share the results when they are available,

Dave

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