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WHAT IS THE HUMANITARIAN NEED?

The need for an economically and environmentally sustainable sanitation alternative to the commonly used pit latrine in humanitarian camps – particularly as camp longevity is increasing. There are currently over 12 million people living in humanitarian camps worldwide and 3.2 million are in African camps.

Providing sustainable sanitation for these populations in a timely and cost efficient way is a huge
challenge, given unfavourable ground conditions. Presently, the suite of technologies employed is very limited. The most common technology is the pit latrine, which requires frequent emptying by tanker or manual labour with faecal sludge either transported off-site or buried.

WHAT IS THE INNOVATIVE SOLUTION?

The Tiger Worm Toilet (TWT) is the nearest technology available to a ‘perpetual toilet’- using worms to continuously treat human waste, transforming it into vermicompost with potential economic and environmental benefits.

Proven at household level in urban and rural settings, this initiative will adapt the technology to serve more users (10-20 people/toilet) in communal latrine blocks/shared family toilets within a humanitarian setting. It will also allow worms to be added later, if not immediately available during an emergency.

Benefits include increasing camp sustainability by reducing frequency of latrine emptying, respective treatment of faecal waste, and providing a concept that can be constructed above and/or below ground (depending on conditions). The system also lends well to user preference, and can be offset or direct drop with a flushing system (using anal cleansing water).

If successful, this innovation could provide a sustainable, safer and more affordable sanitation alternative to the current use of pit latrines.

WHAT ARE THE EXPECTED OUTCOMES?

For people visiting a Tiger Worm Toilet, this innovation will improve user experience as it is flushing, odourless and fly-free.

For agencies, governments and donors supporting humanitarian camp sanitation, it will increase environmental and economical sustainability and close the sanitation loop. This is because the TWT is treating the waste on site, reducing frequency of emptying.

In the vermifilter, the by-product is generated at the top of the system meaning emptying becomes easier. For the household systems, it has been estimated that they will require emptying once every five years.

Additionally, the by-product is relatively dry, odourless humus that can be used as a soil conditioner or buried on-site.

This initiative will produce a Design and Operation Manual and an Implementation Manual for the TWT, providing a ‘pick up and go’ pack to be used and replicated by other WASH stakeholders – thus increasing the uptake, experience, and scale of TWT.

Latest Updates

The tiger roars!

15 Feb 2017

The team visit work farms in Myanmar.

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2017Feb

Seeing is believing…in the worms!

04 May 2017

In one camp there are over 10,000 people and more than 500 pit latrine toilets. These toilets are shallow and need to be emptied regularly. As you can imagine this is a difficult, messy and costly job.

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May

Little sanitation engineers

16 May 2017

"What do you think about worms? Would you be comfortable working with worms?”

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The tiger tales!

11 Jul 2017

With approximately 850 people are currently using Tiger Worm Toilets in Sittwe, Oxfam share what they've found so far.

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Jul

Monitoring is no joke

27 Sept 2017

An interview with Oo Shwe Than, who joined Oxfam in Myanmar two months ago to oversee the monitoring activities of the project in Sittwe.

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Sept

Mid-term monitoring of Tiger Worm Toilets

19 Dec 2017

The project is at a critical point as the rainy season has just ended and this will have tested the robustness of the TWTs.

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Dec

A picture is worth a thousand words

26 Apr 2018

The focus of this project is not only on the construction of toilets; but on the users of those toilets and encouraging good sanitation habits.

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2018Apr

Not so simple samples

25 Sept 2018

The question to answer next is – how safe is the vermicompost for disposal or reuse in some way?

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Sept

Sharing learning about humanitarian Tiger Worm Toilets

05 Dec 2018

Oxfam share their findings through a Dissemination Workshop with national and international stakeholders, and the production of a user-friendly TWT Technical Manual.

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Dec

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