[Effect of alkaline treatment on anaerobic digestion of rice straw].

The biogas yields of rice straw during anaerobic digestion can be improved by alkaline pretreatment, while it increased the cost because of large amount of alkaline. In order to decrease the amount, 3 sets of experiments were performed using straw with alkaline treatment (pretreatment), digested straw with alkaline treatment (post-treatment) and straw digested directly (control). The results showed that cell wall of straw was destroyed by 5% NaOH treated for 48h, the COD (chemical oxygen demand), total nitrogen, NO(3-) -N and NH(4+) -N were increased from 2 311.

[Anaerobic co-digestion of corn stalk and vermicompost].

The characteristics of corn stalk digested alone at different total solid (TS) loading rates and co-digestion of various proportions of corn stalk and vermicompost were investigated by batch model at 35 degrees C +/- 1 degrees C. The organic loading rates (OLRs) studied were in the range of 1.2%-6.

[Effect of cow feces on anaerobic digestion process of Spartina alterniflora].

Effects of cow feces on anaerobic digestion process of Spartina alterniflora was studied by batch model at 35 degrees C. When Spartina alterniflora was digested alone, the biogas yield was 222.61 mL/g, and it was acidified from 10 d to 15 d.