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close this bookCriteria for the Dissemination of Biogas Plants for Agricultural Farm and Household Systems (GTZ, 1993, 25 p.)
close this folder7. Data collection
View the document(introduction...)
View the document7.1. Daily gas demand of a farm household or farm
View the document7.2. Expected gas production
View the document7.3. Economic efficiency

7.1. Daily gas demand of a farm household or farm


The gas demand can be defined on the basis of energy consumed previously.

1 kg firewood

then corresponds to

0.2 m³ biogas

1 kg dried cow dung

" " "

0.1 m³ biogas

1 kg charcoal

" " "

0.5 m³ biogas

11 kerosine

" " "

2.0 m³ biogas

The gas demand can also be defined using the daily cooking times. The use of a stove per hour then corresponds to about 0.3 m³ biogas.


1 lamp consumes about 0.5 m³ biogas per day (i.e. about 0.13 - 0.18 m³/h)


For 100 I refrigeration volume, about 2 m³ biogas per day depending on outside temperatures must be assumed. A larger household refrigerator consumes about 3 m³/day


Per heaters for pig or chicken rearing 0.2 - 0.3 m³ biogas per hour has to be assumed.

Any surplus gas can be used in addition in diesel motors. For this to be worthwhile, 10 m³ biogas/day should be available.
To generate 1 kWh electricity with a generator, about 1 m³ biogas is needed.