SuSanA - Forum Kunena Site Syndication http://forum.susana.org/ Sun, 26 Apr 2015 02:47:02 +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: ABR-CW quick sizing tool - by: Marijn Zandee http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13062 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13062
Thanks, I was aware of the DEWATS booklet by Sasse, et al. I find a bit unfortunate that they presented the formulas used in the spreadsheets as EXCEL code, rather than as the formulas they used to base the Excel code on.

Probably, a lot of the formulas that were used for this booklet are still valid. Though for colder climates some parameters (such as up flow speed)may have to be adjusted.

Regards

Marijn]]>
Biogas sanitation systems and DEWATS Sat, 25 Apr 2015 03:36:47 +0000
Re: Reply: RE: Biogas Sanitation Systems Designs - by: pkjha http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#13051 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#13051 There are several information available on toilet linked biogas plants. I also implemented a few hundred such toilets.
If you require any specific information, you can post.
regards

pawan]]>
Biogas sanitation systems and DEWATS Fri, 24 Apr 2015 11:07:31 +0000
Re: ABR-CW quick sizing tool - by: jankn http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13048 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13048 Exactly, the formulas are there in the book, but the Excel files are not available for general use (as far as I know).
I have seen those Excel files being used by BORDA colleagues; but you are right, a word of caution might be advised. Given that the original book has been published nearly 20 years ago now, I am certain that these calculations have been updated based on more recent findings and regional experiences with different design parameters. However, they can still serve as a starting point (!) for dimensioning DEWATS modules (namely Settler, a modified septic tank or ST; Imhoff tanks, biogas settlers or BGS, ABR, AF, PGF, and polishing pond or PP - to add some more abbreviations to the list), but final design should be reviewed by experienced regional experts.
Best
/Jan]]>
Biogas sanitation systems and DEWATS Fri, 24 Apr 2015 09:56:46 +0000
Re: ABR-CW quick sizing tool - by: muench http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13047 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13047 Just to answer your question from 19 April quickly: yes "hab." is the abbreviation for habitant or user. Let me add that to our list of abbreviations: en.wikipedia.org/wiki/Wikipedia:WikiProj...iations_and_acronyms


Hi Jan,
Are those Excel files available for general use? I guess not, as perhaps in the hands of non-experts they do more harm than they do good? (I think this was one of the reasons for BORDA in the past to not make such Excel files available). Just wondering.

Regards,
Elisabeth]]>
Biogas sanitation systems and DEWATS Fri, 24 Apr 2015 09:42:17 +0000
Re: ABR-CW quick sizing tool - by: jankn http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13046 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#13046
http://www.sswm.info/sites/default/files/reference_attachments/SASSE%201998%20DEWATS%20Decentralised%20Wastewater%20Treatment%20in%20Developing%20Coun]]>
Biogas sanitation systems and DEWATS Fri, 24 Apr 2015 09:09:06 +0000
Reply: RE: Biogas Sanitation Systems Designs - by: fmunthali http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#13030 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#13030
Fredrick Munthali]]>
Biogas sanitation systems and DEWATS Wed, 22 Apr 2015 16:48:23 +0000
Re: RE: Biogas Sanitation Systems Designs - by: Marijn Zandee http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#12994 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#12994
This is a recurring topic. See for example this discussion:

forum.susana.org/forum/categories/171-fo...rience-in-this-field

If you use the search function (right top of the screen), you will find more discussions on the topic. I would recommend reading those. If you have more specific questions after that, please feel free to ask.

This is also a good resource:

www.susana.org/en/resources/library/details/877

Regards

Marijn]]>
Biogas sanitation systems and DEWATS Mon, 20 Apr 2015 14:51:11 +0000
RE: Biogas Sanitation Systems Designs - by: fmunthali http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#12993 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12993-re-biogas-sanitation-systems-designs#12993 We would there like to learn lessons from those who have successfully implemented such toilets. Would also anyone provide me with suitable designs for the same so that we can compare with what we are developing.
Any assistance rendered will be greatly appreciated.

Fredrick Munthali]]>
Biogas sanitation systems and DEWATS Mon, 20 Apr 2015 14:34:17 +0000
Re: ABR-CW quick sizing tool - by: Marijn Zandee http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12973 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12973
Thanks, this will give us some general idea to start a discussion.

Christoph,

The figure of 3m2/hab does this mean per inhabitant/user?

Regards

Marijn]]>
Biogas sanitation systems and DEWATS Sun, 19 Apr 2015 08:30:20 +0000
Re: ABR-CW quick sizing tool - by: christoph http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12968 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12968 ... just to have an idea about volume and space.
  • 12 h detention time for the ABR
  • 1,8 m²/hab. for a vertical flow sand filter wetland, 3m²/hab. horizontal flow.

correction. hab. = pe (person equivalent)

For warm climates
CP]]>
Biogas sanitation systems and DEWATS Sat, 18 Apr 2015 13:58:54 +0000
Re: ABR-CW quick sizing tool - by: JKMakowka http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12964 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12964 www.sswm.info/sites/default/files/refere...nd%20Tecnologies.pdf

And maybe this for wetlands:
www.sswm.info/sites/default/files/refere...ucted%20Wetlands.pdf

(www.sswm.info is a good resource for finding such documents)]]>
Biogas sanitation systems and DEWATS Sat, 18 Apr 2015 10:32:20 +0000
ABR-CW quick sizing tool - by: Marijn Zandee http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12962 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12962-abr-cw-quick-sizing-tool#12962
Does anyone have a quick and dirty sizing tool (or reference to some simple formulas) for an ABR and a Constructed wetland to treat approximately 8 m3 of waste water per day? The BOD is probably around 250 mg/L.

At this stage I need to give people some idea of the size of units we would need for this option. If it becomes a serious project, we will do actual BOD/COD analyses and hire a waste water engineer for the design of the unit.

Thanks

Marijn Zandee]]>
Biogas sanitation systems and DEWATS Sat, 18 Apr 2015 09:56:04 +0000
Re: Fwd: Hello.. re: DRDO Biotoilet - by: pkjha http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12003-drdo-biotoilet-in-india-defence-research-a-development-organization-india-biodigester-abr-constructed-wetland#12479 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12003-drdo-biotoilet-in-india-defence-research-a-development-organization-india-biodigester-abr-constructed-wetland#12479
Your information- DRDO biotoilet has basically two components: an anaerobic tank having special design and a small constructed wetland (reed bed), which may be incorporated on the top of the tank........Reed Bed is incorporated at the household systems may be on the top of the tank.
It is difficult to understand to implement reed bed at the top of the tank.Pl. send a sketch and flow diagram of the system. You may like to inform whether reduction of pathogens and BOD in effluent is the function of toilet or reed bed. If both, what is percentage of reduction through each system?

regards
pawan]]>
Biogas sanitation systems and DEWATS Sun, 15 Mar 2015 08:28:13 +0000
Fwd: Hello.. re: DRDO Biotoilet - by: drlsoumya http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12003-drdo-biotoilet-in-india-defence-research-a-development-organization-india-biodigester-abr-constructed-wetland#12450 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12003-drdo-biotoilet-in-india-defence-research-a-development-organization-india-biodigester-abr-constructed-wetland#12450
Thank you for your mail and I am also sorry for my late reply, as I was outstation.

You sent the following queries by e-mail to me:

One immediate question I have: we were told on the forum so far that this system is also used on trains in India. But you can’t get such a wetland onto a train? Also, the information provided so far only spoke of the effluent from the anaerobic tank, but not from the constructed wetland. I think this is where a lot of the confusion came from.



To answer your queries:

1. DRDO biotoilet has basically two components: an anaerobic tank having special design and a small constructed wetland (reed bed), which may be incorporated on the top of the tank.

2. Tank is a fully sealed construction. Fecal matter from toilet comes to tank directly, where, DRDO developed bacterial group (ontime incorporation at the time of first use) initiates faster digestion. Here I must mention, in the common anaerobic steps, First Hydrolytic and last Methanogenic is very important.

3. Through our research we have augmented the bacterial population so that they can hydrolyse mostly all of the undigested material. The design of the tank help a proper retention time for the bacteria to act upon the various substrates.

4. Methanogens are endusers of this system. Keeping proper attention, we have also augmented different methanogens from various sources to run the system smoothly. Being Acetogenic and Methanogenic steps are fully anaerobic in nature, we designed our tank in that manner.

5. Thus a robust consortium has been made for all four steps that feeds on human fecal matter. Further, there are numbers of bacterial homes (attachment sites) that help to make the reactor more robust and efficient.

6. Reed Bed is incorporated at the household systems may be on the top of the tank. Through simple piping arrangements (without input of any extra energy, like operating any pump) the effluent water comes out to the reed bed, that help to further reduce the COD, turbidity, and the coliforms and other pathogenic bacterial load (done a detail study in my laboratory why reed bed is so efficient!). It is very interesting to say that, the water after reed bed treatment is very safe to reuse for reflushing, thereby reducing the water loss in the flush-toilet system for more than 85%. Further, the size of the reed bed is much less than the conventional practices, thereby reducing the space. People can landscape the whole thing in front of their home/ apartments/ institution with the Biotank-Reedbed combination.

7. Railway doesnot use reed bed. There are several factors were kept in mind to design a tank for the railway as a mobile platform. However, with a very innovative design with DRDO & Indian Railway Scientists, the tank is successfully being implemented in all the coaches. The internal design of the tank is more or less same.. but external shape and size is different from the tank for the households/ stationary toilets.


Kindest regards

soumya


--------------------------------------------------------
Dr. Soumya Chatterjee, DRDS
Scientist D & Head, Biodegradation Technology Division
Defence Research Laboratory
Defence R&D Organization, Ministry of Defence, Govt. of India
Post bag no 2, Tezpur 784001, Assam, India
Phone: +91 3712 258508 (O); Fax: +91 3712 258534 (O); +91 9435738428 (Mob)]]>
Biogas sanitation systems and DEWATS Thu, 12 Mar 2015 03:50:59 +0000
Fwd: Hello.. re: DRDO Biotoilet - by: drlsoumya http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12003-drdo-biotoilet-in-india-defence-research-a-development-organization-india-biodigester-abr-constructed-wetland#12449 http://forum.susana.org/forum/categories/35-biogas-sanitation-systems-and-dewats/12003-drdo-biotoilet-in-india-defence-research-a-development-organization-india-biodigester-abr-constructed-wetland#12449
Greetings!

I am writing this post in continuation with your recent SuSanA forum conversation regarding DRDO Biotoilet by Banka Bioloo team.

Let me introduce briefly. I am Soumya, working as Sr scientist at Defence Research & Development Organization (DRDO), the research wing of Min of Defence, Govt of India. I am also heading a division at my laboratory.

DRDO is working on the Biotoilet aspects from long back. Having several field trials, amendments, research DRDO is opening up its one of the very important technology, which, seems, very important globally. With several ministries (including Indian Railway) Govt organizations, a good number of private companies, DRDO has MoU for implementation of this technology; and during this Swach Bharat Mission, our product is the technology for our country India. Lot many installations are there in India.

This is an Ecofriendy (effluent can be reused, no energy input, no man-power required for cleaning the tank), Appropriate (different climate and conditions, including mobile platforms) and affordable (cost less than a conventional household septic tank system) technology. I am sending you a writeup for your perusal, please.

Kindest regards

Soumya

--------------------------------------------------------
Dr. Soumya Chatterjee, DRDS
Scientist D & Head, Biodegradation Technology Division
Defence Research Laboratory
Defence R&D Organization, Ministry of Defence, Govt. of India
Post bag no 2, Tezpur 784001, Assam, India
Phone: +91 3712 258508 (O); Fax: +91 3712 258534 (O); +91 9435738428 (Mob)]]>
Biogas sanitation systems and DEWATS Thu, 12 Mar 2015 03:50:21 +0000