DIY RENEWABLESBIODIGESTER LOW FIDELITY PROTOTYPE

Hi. My name is Liz. I’m here to tell you about the biodigester. .

Here is a picture of it. I’ve been using it for about 3 years now. Its e�cient and has been able to help my family reduce costs

especially in the use of kerosene and Liqui�ed Natural Gas(domestic cooking gas).

HOW IT WORKS.

Food waste come in here Biogas comes out here to be connected1. Directly to kitchen for cooking2. For storage .

Biogas rises upAnaerobic digestion

of food waste

Inlet for kitchenand garden waste

Gauge

Biodigester

Reads the amount of biogasavailable

Slurry outletfor emptying tank

after 3 months

A study was carried out in 2006 , highlighting the bene�ts of using a biodigester in Cambodia. Here are some sustainable development bene�ts of a biodigester.

Reduction of workload.Saving �rewoodSaving moneySaving keroseneImprovement of health

Increase in agricultural production.

2.5 hours (on average) per household per day2,500 kg per year when 40kg dung/day is fed into the biodigesterWith a conservative price estimate of €0.038/kg; €94.54 per year50 liters per year when a gas lamp is usedNo indoor air pollution, less �ies. In case a toilet is attached, pathogensare killed. Reduced eye and respiratory diseases. Up to 40% increase in yields from most crops, no further need forchemicals

Source: Bunny and Besselink, 2006.