SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Thu, 11 Feb 2016 02:24:57 +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: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: SudhirPillay http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16892 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16892
According to your recommendations:
1. Although granulation is not a requirement for ABRs as would be the case in UASBs, it does benefit the system. I investigated the granulation aspects for the Foxon (20006) report. Better performance was attained when granulation occurred but the conditions needed to be right for that - upflow velocities cannot be too high as washout occurs. I know that BORDA has a PhD candidate investigating biomass activity in sludge beds of ABRs in DEWATS plants. He has also seeded a plant with brewery sludge from an UASB - Nicolas would be able to point you in right direction on how to obtain that data from the PhD candidate.
2. Agree angle baffles and promoting mixing. But usual option is to have downflow pipes instead of hanging walls. Maybe a consideration for future.

Kind Regards
S]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Mon, 08 Feb 2016 08:49:24 +0000
Exploring alternative sources of funding for deploying sustainable sanitation technologies and services in Mongolia - by: nazimuddin http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16824-exploring-alternative-sources-of-funding-for-deploying-sustainable-sanitation-technologies-and-services-in-mongolia#16824 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16824-exploring-alternative-sources-of-funding-for-deploying-sustainable-sanitation-technologies-and-services-in-mongolia#16824
Following study which has been published recently at the International Journal of Water Resources Development, deals with some alternative sources of funding to deploy sustainable sanitation technologies in Mongolia which can be applicable to other parts of the world. Full article can be downloaded from the following link:

www.tandfonline.com/eprint/JpzMgPzYrEyGqXXAARAV/full

Abstract:

One of the major challenges for deploying sustainable sanitation technologies and services around the world is financing. The present study applied both qualitative (key informant interviews) and quantitative (household survey) methods to explore sources of alternative financing in Ulaanbaatar, Mongolia, towards deploying sustainable sanitation technologies and services. Microfinance organizations, government subsidies and mining industries may represent potential sources of financing for the implementation of sustainable sanitation technologies and services in Mongolia. Moreover, building social capital among Ger residents and reinventing the idea of ‘corporate WASH responsibility’ could constitute new directions for the future.

Best regards
Nazim]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Wed, 03 Feb 2016 07:24:39 +0000
Re: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: YoviToni http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16813 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16813
Thank you very much for sharing this result. Your research provide useful information on how to design, construct, and operate the ABR. Achieve organic removal until 60% is a successful in community setting. As I work mostly in aerobic treatment, I am very interested to learn more from your recommendation. Your finding showed the lesser performance against the theory as you concluded “Field observations confirmed published laboratory investigations that most treatment occurs in the first two to three ABR chambers and little, if any, beyond” and from Schoebitz, I suppose part of yours, “generally can be seen that the reduction of soluble COD after compartment 3 is very low. A reason for the poor treatment could be that the contact time between microorganisms and the substrates is not long enough for a complete digestion”

So I would like to discuss more what we can do to improve the performance.
Here are some ideas which bearing in my mind:
1. The biomass formation in the form of granule or suspended solid must be occurred, so the ABR start-up should target it, but I think it is crucial. Similarly in activated sludge, the biomass should be kept in a certain concentration in accordance with the organic loading. While in the wastewater engineering handbook also mention the same requirement for anaerobic treatment, I am still not finding the explanation on it over some references in this forum, if any.

2. The baffles/compartments configuration should be adjusted in order to achieve two operational conditions: the solid (sludge/biomass) remains in the system and the maximum contact between sludge and wastewater should occur in longer time. The baffle/compartment design, I see, adopt the settling theory and the mixing theory. For example, the up-flow velocity is designed between 0.5 – 1 m/h, parallel with what usually used for secondary sedimentation tank but in different term: surface overflow rate. Higher the number, higher the turbulence of the flow. As we want to have a maximum mixing, the turbulence flow is what we need. I see two document here, patent from McCarty (1992) and report from Foxon (2006), provide the example of such design, by make an angle baffle. Thus we don’t need so many compartments as current design, the first parts for mixing and the last part for settling.

Need opinion from other part.

Thank you,

Yovianus Toni Sakera]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Tue, 02 Feb 2016 06:10:42 +0000
Re: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: Nicolas http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16806 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16806
Im glad you find the work useful.

I do not have such project-lists, anaerobic treatment is quite far spread, certainly in Indonesia and India there must be thousands of anaerobic systems implemented. Concerning the limiting factor of the anaerobic processes, the general view held for anaerobic reactors treating wastewater with high solid content is that hydrolysis is the rate-limiting degradation step. However, some of the results shown in the thesis suggest that this does not apply for solid accumulating systems such as the ABR. We don’t know yet for sure, but in such systems it is probable that methanogens play a limiting role.

As to the issue of anaerobic discharge: of course, I don’t think anyone would argue that this is the optimal situation, also because of the high ammonium. But one has to look at the context (limited land area, limited funds, no electricity, no skilled labour, very limited maintenance) and at the local situation without such systems (direct discharge to rivers or groundwater, uncontrolled anaerobic digestion in open sewer lines, unlined infiltration pits…). If the context allows, post-treatment (e.g. through planted gravel filters) is possible and in many cases implemented.

Kind regards,
NR]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Mon, 01 Feb 2016 12:14:43 +0000
Magazine: Africa Water Sanitation & Hygiene January - February 2016 Vol.11 No.1 Now Available - by: mwaniki http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16791-magazine-africa-water-sanitation-a-hygiene-january-february-2016-vol11-no1-now-available#16791 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16791-magazine-africa-water-sanitation-a-hygiene-january-february-2016-vol11-no1-now-available#16791 Africa Water, Sanitation & Hygiene

This is the January - February 2016 Vol.11 No.1 edition. You may view this edition via this link afriwater.org/publication/online-magazines . You can also download a pdf version via afriwater.org/publication/publications



Comments are welcome.

Kind regards Steven Mwaniki]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Sun, 31 Jan 2016 13:20:28 +0000
Re: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: F H Mughal http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16677 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16677
Your dissertation is interesting and useful. Since you have put in a lot of work, do you have a list (with brief details) of anaerobic wastewater treatment plants in India, Indonesia, South Africa, and possibly Pakistan?

Did you find performance of methane bacteria as an limiting factor?

Discharging anaerobic effluents in receiving streams might be problematic, as streams under tropical climates are, quite often, low in dissolved oxygen. Anaerobic effluents would further aggravate that condition. At higher temperatures, typical of tropical countries, streams will hold restricted dissolved oxygen. How do you handle that - discharging effluents with almost zero dissolved oxygen in receiving streams?

Regards,

F H Mughal]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Sun, 24 Jan 2016 07:06:26 +0000
Video, factsheet & blog on WASH and nutrition - by: Jona http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16663-video-factsheet-a-blog-on-wash-and-nutrition#16663 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16663-video-factsheet-a-blog-on-wash-and-nutrition#16663
I would like to draw your attention to some intersting material that Generation Nutrition has come up with on WASH and nutriton:

The short video clip was originally produced in French for the World Toilet Day 2015. It is now available in English as well thanks to the support from WASHplus.

Sanitation and nutrition: Let's break the vicious circle!



The Factsheet on WASH and nutrition can now be read in English, French and Spanish.

You can also have a look at the Generation Nutrition Blog here.

Enjoy watching and reading!

Best,
Jona]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Fri, 22 Jan 2016 10:02:17 +0000
Re: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: canaday http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16658 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16658
Yes, there is some problem with that link, but we hope it will get straighened out soon. Here is the paragraph I was referring to:

Another good reason to use the finished compost as cover material is that it filters odors much more efficiently than most other materials, removing and breaking down up to 99% of volatile organic compounds.
(search for: EPA Innovative Uses of Compost: Bioremediation and Pollution Prevention)
It has also been shown to eliminate 75% of the reduced sulfur compound emissions that most contribute to the characteristic aroma of shit (en.wikipedia.org/wiki/Feces#Odor) in a laboratory study of conditions similar to those of commercial composting operations (Büyüksönmez et al. 2012, www.ncbi.nlm.nih.gov/pubmed/23362761), and up to 97% of the stench from landfills (Hurst et al. 2005, cat.inist.fr/?aModele=afficheN&cpsidt=16548526). There have been a couple of isolated cases of dogs or rats being attracted by the odor and messing with the sack that is receiving the feces, but only when sawdust was being used as cover material, not when finished compost was being used (and this is another reason for the plastic bin mentioned above).


In other words, I make the air filter for the Waterless Urinal with 1.5-year-old decomposed ex-feces, which likely contain microbes that consume ammonia (given the occasional mixture of urine in the feces), for example Nitrifying Bacteria, which are known to exist in soil:

en.wikipedia.org/wiki/Nitrifying_bacteria
www.academia-net.org/news/soil-bacteria-...lf-cleansing/1208578

Another question that I would like to ask everyone with respect to the Waterless Urinal is
What studies can be cited to show that less odor is produced from pure stored urine compared to diluted urine or urine deposited on sidewalks, etc.?

Best wishes,
Chris Canaday]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Thu, 21 Jan 2016 13:38:14 +0000
Re: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: Nicolas http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16633 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16633 thanks,
yes, the stormwater issue is an important one and unfortunately not easy to solve on such small scale systems.
Normally one would design an overflow-weir in front of the plant, but these plants are designed for such low maximum design flows that any overflow-weir fitting such max flows would block with raw wastewater.
I propose an alternative solution in the thesis, which could work but still has to be field-proven.
Concerning the effluents: most go directly to rivers, in one case (research-plant South Africa) back to the sewer-line.
As Sudhir pointed out, research on agricultural reuse of such effluents is currently performed in South Africa

Saludos,
Nico

PS: I found your inodoroseco post very interesting, unfortunalty the link www.chekhovskalashnikov.com/water-sanitation/ did not work]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Wed, 20 Jan 2016 07:07:04 +0000
Re: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: SudhirPillay http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16617 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16617
Mr Reynaud also worked on the Newlands Mashu DEWAT system in Durban, South Africa where there were doing agricultural re-use.]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Tue, 19 Jan 2016 12:33:31 +0000
Re: Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: canaday http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16582 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16582
Thanks for posting your important dissertation.

I found very interesting the idea of never desludging the first compartment of an ABR in order to maintain the right bacteria.

It was also important to see your emphasis on keeping storm runoff out of a DEWATS system, as we should all remember this from the start.

It was likely there, but I did not see where the final effluent goes. Have you seen any cases where Subsurface Drip Irrigation of gardens and crops is done? Any comments on this?

Another way to greatly reduce the hydraulic load is to set up Waterless Urinals for the users and take the urine to fields as fertilizer. See my recent post:
forum.susana.org/forum/categories?func=v...amp;limit=1000#16344

Congratulations and good luck.

Best wishes,
Chris]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Sun, 17 Jan 2016 11:10:36 +0000
Ph.D. thesis: “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” now publically available - by: Nicolas http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16579 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16579-phd-thesis-operation-of-decentralised-wastewater-treatment-systems-dewats-under-tropical-field-conditions-now-publically-available#16579
it is a pleasure to announce that my PhD thesis “Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions” is now publically available for download here…
nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-185565

The thesis investigates full-scale anaerobic reactors of communal DEWATS implemented in tropical regions in order to consolidate the basis of future design and support monitoring, operation and maintenance procedures. Special focus is laid on the operation of the Anaerobic Baffled Reactor (ABR) as the core technology of DEWATS.
Field research has been conducted for over four years at numerous communal systems in Indonesia, India and South Africa in order to (i) verify the generally used parameter values for DEWATS design and operation, (ii) identify factors limiting the treatment efficiency of existing systems in the field and (iii) investigate the performance of DEWATS and DEWATS treatment steps (especially ABRs) under tropical field conditions in terms of effluent concentration, Chemical Oxygen Demand (COD) removal, sludge stabilisation and sludge activity.

Chapter 4 has recently been published in “Water Practice and Technology”:
Reynaud, N. & Buckley, C., 2015 Field-data on parameters relevant for design, operation and monitoring of communal decentralized wastewater treatment systems (DEWATS), Water Practice & Technology Vol 10 No 4

Chapter 2.3, part of the literature review, will be published in a revised form in February by “Water Science and Technology”:
Reynaud, N. & Buckley, C., 2016 The anaerobic baffled reactor (ABR) treating communal
wastewater under mesophilic conditions: a review, Water Science & Technology Vol 73 No 3



Great thanks to all the dedicated BORDA staff and others who made this possible!


If you have any questions please don’t hesitate to contact me,

Kind regards,
Nicolas Reynaud]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Sun, 17 Jan 2016 04:17:17 +0000
Re: DRAWING WATER - 2nd edition: A resource book of over 600 WASH and related images - by: Rod http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16465-drawing-water-2nd-edition-a-resource-book-of-over-600-wash-and-related-images#16476 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16465-drawing-water-2nd-edition-a-resource-book-of-over-600-wash-and-related-images#16476
This is now fixed. You may need to refresh your page to see the changes.

Kind regards

Rod]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Fri, 08 Jan 2016 12:00:22 +0000
Re: DRAWING WATER - 2nd edition: A resource book of over 600 WASH and related images - by: Rod http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16465-drawing-water-2nd-edition-a-resource-book-of-over-600-wash-and-related-images#16475 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16465-drawing-water-2nd-edition-a-resource-book-of-over-600-wash-and-related-images#16475
However, I'll make this clearer by highlighting the themes to look like links. Thank for alerting me to this.

Rod]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Fri, 08 Jan 2016 11:39:58 +0000
Re: DRAWING WATER - 2nd edition: A resource book of over 600 WASH and related images - by: dorothee.spuhler http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16465-drawing-water-2nd-edition-a-resource-book-of-over-600-wash-and-related-images#16474 http://forum.susana.org/forum/categories/89-new-publications-books-articles-partner-newsletters-journals-blogs-websites-videos/16465-drawing-water-2nd-edition-a-resource-book-of-over-600-wash-and-related-images#16474
Thank you for sharing- unfortunately, the link only guides us to a short version of the document (page 1 to 10). You may want to correct that.
Cheers, Dorothee]]>
New publications (books, articles, partner newsletters, journals, blogs, websites, videos) Fri, 08 Jan 2016 11:23:11 +0000