What are the differences and similarities between the treatment of FS through the Sewage Treatment Plant (STP) and FSTP?

  • nasirsahar
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STP vs. FSTP

Hi everyone!

May you suggest or offer some readings that may provide clarification on: ---

1. What are the differences and similarities between the treatment of FS through the Sewage Treatment Plant (STP) and FSTP?
2. Apart from CLUES & San-21, what are other methods for FSM planning?
3. Why should Faecal sludge not be discharged into sewerage network if sewage flows to STPs and treatment happen there?
4. Plan & Budget Components of an FSM project?
5. Is any review/compendium available on FSM projects worldwide? that may provide details of everything not only limited to technology?
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  • rahulmankotia
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Re: STP vs. FSTP

The link below is an aggregator of case studies in FSSM. Hope this would be of help
www.cseindia.org/mount/home

There are a lot of guidelines and practitioners guide on FSSM developed by a lot of agencies which can answer most of your queries you mentioned.
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  • vitorhfdiogo
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Re: STP vs. FSTP

Hi Mr. Nasiruddin,

I believe that the answer to most of these questions can be found in this book, specially regarding the questions 1 and 3:

www.susana.org/en/knowledge-hub/resource...library/details/3591

I would also strongly recommend you to read this one, that covers lots of treatment technology aspects and bring some very useful information on existing systems:

www.susana.org/en/knowledge-hub/resource...library/details/3439

And also, since you're from India, I believe this other material would help you with question no. 4:

stepsforsanitation.org/2019/02/techno-ec...ed-systems-in-india/

About the case studies, I would suggest you to go through the FSM Conferences Case Studies. (for example www.susana.org/en/knowledge-hub/resource...library/details/2760 ) You can find them in the knowledge hub.

Good luck with your research!
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  • muench
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Re: STP vs. FSTP

Hi Nasir,

The others have already given you good references to read for your questions. I just wanted to quickly add something on your question 1 and 3:
1. What are the differences and similarities between the treatment of FS through the Sewage Treatment Plant (STP) and FSTP?

A faecal sludge treatment plant (FSTP) would have more similarities with the "sewage sludge treatment processes" of a sewage treatment plant, as faecal sludge is much thicker in consistency than sewage. The Wikipedia article on sewage sludge treatment is quite good: en.wikipedia.org/wiki/Sewage_sludge_treatment
So if your local sewage treatment plant has a good sewage sludge treatment process with spare capacity (probably unlikely), maybe the sludge line could be used to process additional fecal sludge that you could deliver there by tanker.

3. Why should Faecal sludge not be discharged into sewerage network if sewage flows to STPs and treatment happen there?

I think there can be situations where this is possible to discharge faecal sludge in the sewer. It depends on how much faecal sludge you have compared to the sewage flow. If the faecal sludge proportion is low compared to the wastewater flow, and the sewers and STPs are not overloaded it could work. There needs to be enough velocity in the sewers though to sweep along the additional solids.
On the other hand, it may seem illogical to dilute the faecal sludge with water when later on you will have to apply processes to dewater the faecal sludge again.

Hope these pointers help a little bit. Why did you ask?

Elisabeth

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