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close this bookBiogas Plants in Animal Husbandry (GTZ, 1989)
close this folder5. Biogas technique
View the document(introduction...)
View the document5.1 Fundamental principles, parameters, terms
View the document5.2 Design principles of simple biogas plants
View the document5.3 Biogas plants of simple design
View the document5.4 Design and construction of plant components
View the document5.5 Biogas utilization
View the document5.6 Measuring methods and devices for biogas plants


The design aspects dealt with below concentrate solely on the principles of construction and examples of simple biogas plants, i.e. plants:

- for small family farms requiring digester volumes of between 5 m³ and 30 m³,
- with no heating or temperature control,
- with no motor-driven agitators or slurry handling equipment,
- with simple process control,
- built with (at least mostly) local materials,
- built by local craftsmen.

Fig. 5.1: Three-stage anaerobic fermentation (Source: Baader et. al 1978)