Zeng Yuying and her family live in a village in the district of Jian Yang county, in the eastern part of the Sichuan province. The household comprises the Zeng Yuying, her husband, an eighteen year-old son, a five-year-old daughter and the mother of Zeng’s husband. The daughter is going to kindergarten, while the son is working in Jian Yang city and coming home every day. The family keeps its production & livestock for its own consumption, including cereals, vegetables, fruits and chickens. They do also have one sow.
The family annual income is around 1,500 EUR. Both parents are doing morning, afternoon or evening shifts for the commune, repairing roads and public facilities. As an additional income, they sell their sow’s piglets once to twice a year.
Before the construction of the digester, the family was using a traditional stove powered by firewood.