Biogas plant warning signs

Sign at the entrance to an engineering plant for producing biomethane which can be used as a commercial fuel for vehicular use, including trains. In this case the biogas is added to a town's domestic grid after cleaning and adjusting the calorific value by the addition of propane.

The sign emphasises the dangers from accidental fires and toxic, atmospheres.

Images photographed at a plant installed for Thames Water PLC in the UK by Chesterfield Biogas Ltd.