| 摘要 |
<p>A process for converting biodegradable carbon-containing materials into substances containing a significant proportion of methylene groups, which process comprises subjecting the biodegradable carbon-containing materials to bacterial action in a container under conditions of temperature suitable for the bacterial flora present to thrive, of pressure such that any evolved gasses are retained in contact with the carbon-containing materials, of volume such that the free space in the container is minimised, and in the presence of at least sufficient water to maintain the bacterial flora alive.</p> |
