5E1 - Mashad H M, van Loon W P, Grietje Z, et al. Design of a solar thermophilic anaerobic reactor for small farms [ J ]. Biosystems Engi- neering,2004,87 (3) :345 - 353.
6Anon. European renewable energy centers agency- The re- new- able energy barometers : biogas barometer [ EB/OL ~. (2009 - 10 - 18 ) [ 2015 - 04 - 03 ]. http ://www. energies - renouvelables, org/ observ - er/stat_baro/observ/baro179_b, pdf.
7Kitamura Y,Paquin D, Gautz L, et al. A rotational hot gas heating systerm for bioreaetors [ J ]. Biosystems Engineering,2007,98 (2) : 215 - 223.
8Alkhamis T M, E1 -khazali R, Kablan M M,et al. Heating of a bio- gas reactor using a solar energy system with temperature control unit [J]. Solar Energy,2000,69(3) :239 -247.
9Axaopoulos P, Panagakis P. Energy and economic analysis of biogas heated livestock buildings [ J ]. Biomass and Bioenergy, 2003,24 (3) :239 -248.