System Conversion of Septic Tank Public Toilets for Better Waste Management

18.7k views

Page selection:
  • JKMakowka
  • JKMakowka's Avatar
  • Just call me Kris :)
  • Posts: 1044
  • Karma: 35
  • Likes received: 359

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Maybe also look for nearby bar / nightlife areas as people tend to urinate publicly close to these (putting up mobile urinals on the weekends can really help with that).
For the overall hydrology of the lakes the local sewerage utility might have a run-off simulation or at least a higher resolution elevation map.

Looking forward to the results.

Please Log in to join the conversation.

You need to login to reply
  • denniskl
  • denniskl's Avatar
    Topic Author
  • Working on creating shared solutions for common problems
  • Posts: 84
  • Karma: 5
  • Likes received: 18

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Hi Jorgen

Superb, thank you - if we move beyond the next stage, we will certainly be keeping you in mind.

We have an inspection of the lakes and gardens area tomorrow, where we plan to collect sufficient data to prepare a full presentation to the Council.

That presentation will include a proposal that the Council contract our team to conduct a full survey including water, pollutant, pathogen and other samplings.

We already know they have significant sludge buildup and algae blooms, so there are concerns with the water quality - the core is that they don't know exactly what's going into the lakes (including from the public toilets) and therefore how to wholistically manage those inflows.

For all; I have attached the Inspection Record we intend to use for this Inspection to this thread for Susana members to review and suggest any improvements
Creator of the RealChange Global Impact Fund and MCM GREENMAN GROUP

Solving housing quality , power reliability, water supply and sanitation management in developing countries with private sector impact investors money

Philosophy

* See a problem.
* Make sure it's the real problem (by talking to the people with the problem).
* Find people who are solving this problem somewhere in the world and collaborate - and learn from them to solve the problem
OR
* Create a new solution where none exists
* Find passionate people who care about the problem to help implement solutions

Our solution approach - what's yours?

Dennis McMahon
From Australia; based in Malaysia
www.mcmgreenmangroup.com (R & D and project implementation)

www.RealChangeImpact.com

Funding from the private sector, giving market level returns

This message has an attachment file.
Please log in or register to see it.

Please Log in to join the conversation.

You need to login to reply
  • jorgenfidjeland
  • jorgenfidjeland's Avatar
  • Posts: 6
  • Karma: 1
  • Likes received: 3

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Hi Dennis,

If you want to convert to another waste management system without changing the whole infrastructure, you may sanitize the blackwater with ammonia and then use it as a fertilizer. This requires you to convert the sedimentation-separation septic tanks to closed septic tanks with no outlet, but otherwise you can use the same toilets. When a tank is full, you can add some urea (e.g. 1 %) and let it stay for a time (e.g. 1 month), after which the pathogens are inactivated and it can be used as a fertilizer. During this time you will need another tank for alternate filling.

There is no risk of spreading pathogens to the water ponds in the park with this type of closed-system. Furthermore, all the nutrients in the excreta can be recycled and used in agriculture. The main constraint is probably the cost of transport of large volumes of treated blackwater to the fields. Furthermore, if the toilets are using large flushwater volumes, then the existing septic tanks may not have sufficient storage. In order to avoid the ammonia escaping to the air, which will cause a bad smell, it is crucial that the tanks are airtight.

Higher urea dose cause faster inactivation of pathogens, and hence a shorter storage time can be applied. The urea dose can therefore be adjusted to achieve the desired storage time. However, higher urea doses than 2 % is not recommended from environmental point of view, and shorter storage time than around 2 weeks is not possible at ambient temperatures.

Here are some reports about the technology and its use in Sweden, although here is normally the storage facility located at the farm.

Blackwater sanitization with urea in Sweden – sanitization effect and environmental impact stud.epsilon.slu.se/6945/1/vidal_b_140630.pdf
The potential for self-sanitisation of faecal sludge by intrinsic ammonia
www.sciencedirect.com/science/article/pii/S0043135413005988
Presentation at FSM3: Inactivation of Ascaris Eggs and Salmonella spp. by Ammonia
www.susana.org/images/documents/07-cap-d...1/2-1-5-1-Nordin.pdf


We are several people working with this technology in Sweden, and as we would like to see more applications of the technology worldwide, we will gladly share our experiences with you.

Best regards
Jörgen Fidjeland

Please Log in to join the conversation.

You need to login to reply
  • mwaniki
  • mwaniki's Avatar
  • Posts: 145
  • Karma: 4
  • Likes received: 22

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Hi Dennis

Just don't give up so easily on the BioFizz. This is a South African product and the researchers there are renowned, self disciplined and serious.

Kindly contact them at:

CSIR Biosciences
Pretoria
South Africa
Telephone: +27 (0)12 841 3260
Facsimile: +27 (0)12 841 3561
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
OR visit www.csir.co.za

Best regards / Mwaniki
Am the publisher of the Africa Water,Sanitation & Hygiene and the C.E.O. of Transworld Publishers Ltd.,Nairobi-Kenya.

Please Log in to join the conversation.

You need to login to reply
  • denniskl
  • denniskl's Avatar
    Topic Author
  • Working on creating shared solutions for common problems
  • Posts: 84
  • Karma: 5
  • Likes received: 18

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

And this is why we participate in fantastic forums like susana!

Thank you Elisabeth*, just saved me time can go to more productive things:)


+++++++

* For this post: forum.susana.org/forum/categories/53-fae...it=12&start=24#11976
Creator of the RealChange Global Impact Fund and MCM GREENMAN GROUP

Solving housing quality , power reliability, water supply and sanitation management in developing countries with private sector impact investors money

Philosophy

* See a problem.
* Make sure it's the real problem (by talking to the people with the problem).
* Find people who are solving this problem somewhere in the world and collaborate - and learn from them to solve the problem
OR
* Create a new solution where none exists
* Find passionate people who care about the problem to help implement solutions

Our solution approach - what's yours?

Dennis McMahon
From Australia; based in Malaysia
www.mcmgreenmangroup.com (R & D and project implementation)

www.RealChangeImpact.com

Funding from the private sector, giving market level returns

Please Log in to join the conversation.

You need to login to reply
  • denniskl
  • denniskl's Avatar
    Topic Author
  • Working on creating shared solutions for common problems
  • Posts: 84
  • Karma: 5
  • Likes received: 18

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Hi mwaniki

Biofizz could be useful


Went to csir site but not much info on case studies

Any idea how to buy for testing?

Seems like a possibility for much wider use if effective
Creator of the RealChange Global Impact Fund and MCM GREENMAN GROUP

Solving housing quality , power reliability, water supply and sanitation management in developing countries with private sector impact investors money

Philosophy

* See a problem.
* Make sure it's the real problem (by talking to the people with the problem).
* Find people who are solving this problem somewhere in the world and collaborate - and learn from them to solve the problem
OR
* Create a new solution where none exists
* Find passionate people who care about the problem to help implement solutions

Our solution approach - what's yours?

Dennis McMahon
From Australia; based in Malaysia
www.mcmgreenmangroup.com (R & D and project implementation)

www.RealChangeImpact.com

Funding from the private sector, giving market level returns

Please Log in to join the conversation.

You need to login to reply
  • mwaniki
  • mwaniki's Avatar
  • Posts: 145
  • Karma: 4
  • Likes received: 22

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Hi Dennis

Kindly take note of a new product called BioFizz, which a biological product formulated
to treat septic tanks. Could it be of help? Please check details in the latest edition of Africa Water, Sanitation & Hygiene Jan-Feb 2015 page 15.

Regards / Mwaniki
Am the publisher of the Africa Water,Sanitation & Hygiene and the C.E.O. of Transworld Publishers Ltd.,Nairobi-Kenya.

Please Log in to join the conversation.

You need to login to reply
  • denniskl
  • denniskl's Avatar
    Topic Author
  • Working on creating shared solutions for common problems
  • Posts: 84
  • Karma: 5
  • Likes received: 18

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Thank you marijn and mughal

Will include storm drain mapping and Condition in study, along with soil structures and other suggestions
Creator of the RealChange Global Impact Fund and MCM GREENMAN GROUP

Solving housing quality , power reliability, water supply and sanitation management in developing countries with private sector impact investors money

Philosophy

* See a problem.
* Make sure it's the real problem (by talking to the people with the problem).
* Find people who are solving this problem somewhere in the world and collaborate - and learn from them to solve the problem
OR
* Create a new solution where none exists
* Find passionate people who care about the problem to help implement solutions

Our solution approach - what's yours?

Dennis McMahon
From Australia; based in Malaysia
www.mcmgreenmangroup.com (R & D and project implementation)

www.RealChangeImpact.com

Funding from the private sector, giving market level returns

Please Log in to join the conversation.

You need to login to reply
  • F H Mughal
  • F H Mughal's Avatar
  • Senior Water and Sanitation Engineer
  • Posts: 1026
  • Karma: 20
  • Likes received: 227

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Dear Dennis,

If that problem were to occur here, the municipal authorities would take following action, assuming the park is extensively used by children and women:

1. Clean the stormwater drains. Here, stormwater drains are cleaned before the onset of wet season. Replace damaged stormwater pipes when cleaning does not help. This equally applies to sewer pipes. Replace the damaged sewer pipes.
2. If you want to reuse the effluent, be careful with anaerobic system, if you prefer that. Anaerobic system emits rotten egg-like hydrogen sulfide gas – remember, you have children at the park. You would need aeration as last step, to increase DO level of the effluent.
3. I assume that the park has a proper stormwater conveyance system, with favorable contours that facilitate flow of rainwater to stormwater drains, with no hindrances.

Regards,

F H Mughal
F H Mughal (Mr.)
Karachi, Pakistan

Please Log in to join the conversation.

You need to login to reply
  • Marijn Zandee
  • Marijn Zandee's Avatar
  • Moderator
  • No longer working in WASH, but still following the forum.
  • Posts: 261
  • Karma: 22
  • Likes received: 134

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Dear Dennis,

Overflow during the monsoon, seems to suggest that there are storm water drains that end up in the septic tank. I would see that as a first priority to solve.

Further, I think Chris's suggestion of ABRs, is sound. If water recycling for flushing or planted reed beds are not an option for the city council. You may consider some subsurface infiltration in sand trenches. But that would also depend strongly on the local hydrology.

Considering that these are public toilets and that Malaysians seem to like using a lot of water for cleaning them. I would think that a simple and robust wet system would be most appropriate.

Regards

Marijn
Marijn Zandee

E: This email address is being protected from spambots. You need JavaScript enabled to view it.

Please Log in to join the conversation.

You need to login to reply
  • denniskl
  • denniskl's Avatar
    Topic Author
  • Working on creating shared solutions for common problems
  • Posts: 84
  • Karma: 5
  • Likes received: 18

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Thank you Chris

I will get maps and layouts (there are several toilet blocks), so we can see the overall picture

Budget range available is reasonable, is just a matter of justifying any recommendation with rational reasoning

Interesting study using insects for the water quality research; have started to review
Creator of the RealChange Global Impact Fund and MCM GREENMAN GROUP

Solving housing quality , power reliability, water supply and sanitation management in developing countries with private sector impact investors money

Philosophy

* See a problem.
* Make sure it's the real problem (by talking to the people with the problem).
* Find people who are solving this problem somewhere in the world and collaborate - and learn from them to solve the problem
OR
* Create a new solution where none exists
* Find passionate people who care about the problem to help implement solutions

Our solution approach - what's yours?

Dennis McMahon
From Australia; based in Malaysia
www.mcmgreenmangroup.com (R & D and project implementation)

www.RealChangeImpact.com

Funding from the private sector, giving market level returns

Please Log in to join the conversation.

You need to login to reply
  • canaday
  • canaday's Avatar
  • A biologist working toward sustainability
  • Posts: 400
  • Karma: 18
  • Likes received: 175

Re: System Conversion of Septic Tank Public Toilets for Better Waste Management

Hi Dennis,

How much space is available in the park?
What sort of budget is available?
How many users on the average day? ... and the peak day?

I would suggest UDDTs (with lots of educational material and attendants all the time), but it might also be a good case for recycling flush water after treating it via anaerobic digestion (e.g., ABRs) and vegetated sand filters :ohmy:
forum.susana.org/forum/categories/40-gre...ructed-wetland#11393

... and it would be a great place for exercise equipment that pumps the treated water back up to the overhead tank.

( By the way, my student intern did a great study using aquatic insects and other macroinvertebrates to measure water quality and found big impacts of wastewater discharges. She also looked at less toxic alternatives to chlorine bleach ... and a traditional mix of ashes and plants whitened clothes better than chlorine:
issuu.com/chriscana/docs/allie_isp_ece_fa14_rowe_final.docx
Spanish presentation: t.co/Fx93we29Af B) )

Best wishes,
Chris Canaday
Conservation Biologist and EcoSan Promoter
Omaere Ethnobotanical Park
Puyo, Pastaza, Ecuador, South America
inodoroseco.blogspot.com
The following user(s) like this post: Marijn Zandee

Please Log in to join the conversation.

You need to login to reply
Page selection:
Share this thread:
Recently active users. Who else has been active?
Time to create page: 0.123 seconds
Powered by Kunena Forum