Before construction begins, the team have to dig out layers
and layers of garbage
It's estimated that around 2.6 billion people around the
world make do without any sanitation, including more than 10
million in the slums of Kenya. Still more have to use thinly
disguised holes in the ground. A group of MIT students have
joined forces to try and create a sustainable toilet solution
for those in need. They've developed a low cost, modular
sanitation solution which would be operated and maintained by
locals and the waste transported to nearby processing plants.
Biogas produced from the waste will be used to create
electricity and what's left of the human waste turned into
fertilizer.
As you complain about the state of the toilets at the latest
rock festival, spare a thought for those who have it much worse.
A huge chunk of the world's population is either denied any
sanitation at all or make use of so-called pit latrines – where
holes in the ground are surrounded by ramshackle sheds generally
erected using foreign aid funding. Such funding doesn't pay for
their upkeep though and they soon fall into disrepair.
The long term aim of the Sanergy project is to create a
sustainable sanitation cycle in high density informal
settlements where the availability of such services are low.
Sanergy is made up of MIT students who have developed a model
which will see sanitation centers paying for their own upkeep
and also generating income and power for local people.
The project proposes a network of franchised, low cost
sanitation centers being constructed in slum areas, like those
of Kisumu (one of the largest slums in the world). Each center
would measure 10 x 6 feet and provide clean, hygienic shower and
toilet facilities to meet the needs of around 200 people. The
day-to-day operation of the centers will be franchised to local
people who will generate wages and maintenance funds by charging
users a small per use or subscription amount of, say, about a
dollar a month. Further income could be generated by the sale of
basic toiletries.
Sanergy has developed something called the Ecosan system
where waste is deposited into air-tight containers. These are
collected from the sanitation centers on a daily basis as part
of a small collection route licensed to local people. The waste
collectors will then transport the containers by handcart to an
intermediate processing facility, and from there onto central
processing plants.
The processing facility converts the waste into biogas
through large-scale anaerobic digestion and feeds it into a
combined heat and power engine to generate electricity. The
power could then be sold directly to the Kenya Light and Power
Company and the national grid through long term purchase
agreements. Vermicomposting techniques will convert whatever's
left into high-grade fertilizer for onward sale to small-scale
and commercial farms.
Sanergy has
recently presented its project model to the 13th Annual MIT
Venture Capital Conference and is currently raising funds to add
25 more centers to the two it has already built. For the moment
the current pilot facilities are being funded by the company but
it is hoped that such centers will become self-sustaining in the
future. If successful, the model can be repeated in other
developing nations.
The following video shows the project in detail:
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