Mt Tankeu says he processes around five tonnes of oil every month.
The stove he manufactured is sold for around US$109.
2 litres of oil, costing US$2.35, can achieve the same cooking time as a 6 kilogram domestic gas bottle costing US $10.
Recycling used oil also brings economic benefits, says sustainable development expert Guy Merlin Tindjou Ouandie.
A customized collection of grant news from foundations and the federal government from around the Web.
In the world of social enterprises, failure is a cringe-worthy moment nobody wants to talk about. But, social entrepreneurs can benefit from their failures.