A Chinese Biogas Manual

The production of biogas which is regarded in many countries as a by-product of an efficient system of energy production has become in China a comprehensive controlled method of waste disposal recycling resources supplying energy and fertilizer and improving rural health as the digesting of wastes in a closed container kills many of the pathogens responsible for common human diseases. There are already approximately seven million biogas pits in opertion with Sichuan (Szechuan) province leading the country in a movement to extend the practice throughout the countryside. This manual describes in detail how to build the pit and covers a full range of designs to suit various soils from sandstone to sheer rock. It also includes a description of how the original manual was used.