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.

About the Author

Ariane van Buren has worked with large pension funds, foundations and endowments on energy, climate, and water risk. She advised the UN's Principles for Responsible Investment (UNPRI), and also served as director of investor engagement for Ceres and the Investor Network on Climate Risk (INCR), where she led trustee training and action by institutional investors on investment risks and opportunities. Professor van Buren is also a faculty member at Columbia University.

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