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Potentiality of domestic biogas plants in China „ It was forecasted that the potentiality of domestic biogas plants is 150 millions on the basis of climate potential and social-economic potential by Some Chinese experts , that may cover of 55% of the household in rural area in China. It means that the number of biogas plants in use will meet the requirement of 20% of potentiality by 2010. „ If we consider the trend of rural economy developing in China, the potentiality should be modified based on two aspects: (1) Industrialization of animal husbandry with fast development speed；(2) the movement of traditional farmer from rural area to cities and towns. „ Approximately, the potentiality of domestic biogas plants in China is among the 80 millions mainly based on the national pig dung potential

The author of this HowTo biogas digester might be a good resource person : http://www.greenoptimistic.com/about-us/ "To construct a good biogas plant, you should not only respect the dimensions as indicated on the drawing but also follow the correct construction method. Hereunder, in a step-by-step fashion, the right construction method of the 2047 design GGC model biogas plant is given."

"Nepal Biogas Plant -- Construction Manual Construction Manual for GGC 2047 Model Biogas Plant"

List of (apparently free) eBooks about biogas production: Biogas Factsheet Methane-Biogas Production Guide (15p) 3-Cubic Meter Biogas Plant Construction Manual (40p) Nepal Biogas Plant Construction Manual (15p) Biogas Production from Manure (6p)

"PD Dr. Joachim Clemens, Prof. Dr. Heiner Goldbach, University of Bonn, Institute of Crop Science and Resource Conservation (INRES), Plant Nutrition, Karlrobert-Kreiten-Straße 13, D 53115, Germany Tel.  (+49)-228-732850 (Goldbach)  (+49)-228-732150 (Clemens) Fax: (+49)-228-732489 Email: h.goldbach@uni-bonn.de           a.clemens@uni-bonn.de"

List if several digester projects

Lots of resources about biogas generation DIY