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Altenburger, 33, is a co-founder of x-runner, a for-profit that installs waterless toilets in Lima, Peru.
The startup has signed up 500 customers and has broken even in three years.
Separett is designed so as to make it desirable as a lifestyle statement.
"Historically, westerners have mixed water and urine with faeces to transport to plants in order to separate them again.
Somehow, we have managed to make it go right."