The object of this study is to provide the scientific basis of biogas industry with agricultural residue straws as energy biomass. The biogas productivity potential experiment and reactor amplification experiment are carried out to study biogas yield from different agricultural straws including wheat straw, corn straw, peanut straw, soybean straw as well as rice straw, and the relationship between biogas yield and the anaerobic reactor volume with wheat straw as the substrate and with biogas slurry as a source of microorganisms under room temperature conditions (35�?. Micro-aerobic pretreatment fermentation technology is used to treat the agricultural straws. The batch anaerobic digestion technology and drainage collection process are used. The results show that the order of biogas yield from high to low is wheat, rice, corn, peanut and soybean straw. The utilization of peanut straw is the largest, followed by rice, corn, soybean and wheat straw. With wheat straw as the substrate amplification test reactor, gas production of 2.5 L and 1 L reactor is similar, and gas production rate and daily gas production of 2.5 L reactor is about 3 times than that of 15 L reactor.

The object of this study is to open the new ways of exploitation and utilization of traditional Chinese medicine residue (TCMR) as new energy material to produce biogas through indoor simulation tests. The experiment is carried out to study the effect of physical pretreatment by crusher on the biogas productivity of TCMR under medium temperature condition (35°C). TCMR is used as signal fermentation material without foreign elements which is 5% and cow dung is 10% for inoculum. The batch anaerobic digestion technology and the drainage collection biogas method are used. The results show that there is similar total biogas yield between the smashed TCMR and the unsmashed TCMR, of which the former is 9.35 L and the later is 9.28 L during 51 days fermentation. The biogas yield of smashed TCMR is higher than that of TCMR during fermentation starting period, and lower at the later stage. The results suggest that TCMR could be regarded as biogas fermentation material, and should not be smashed in order to economize the production cost.