• Appliances operating on biogas normally have high surface temperatures. The
danger of burning is high, in particular for children and strangers. A casing of non-
heat-conducting material is advisable.
• The mantle of the gas lamp is radioactive. The mantle has to be changed with utmost
caution. Especially the inhalation of crumbling particles must be avoided. Hands
should be washed immediately afterwards.
• The piping system can form traps on the farm compound. As much as possible, pipes
should be laid some 30 cm underground. Pits for water traps, gas meters, main
valves or test-units should be cased by a concrete frame and covered with a heavy
concrete lid.
67