3.1 Characteristic of chicken manure The main component was shown in Table 1. Table 1 suggested that chicken manure contained 25.64% of TS in wet weight (ww) and 59.28% of TS was organic matters. The NH 4 +-N concentration was as high as 11.32 mg/g-ww in this study, which might be caused by the degradation of nitrogen-contain materials during the