猪粪堆肥化处理的物质变化及腐熟度评价

研究了初始C／N（mC/mN)分别为29和16的2种不同条件对猪粪堆肥化处理的物质变化和腐熟度的影响，结果表明：水溶性有机C／N、固相C／N、水溶性有机碳及水溶性NH4^ -N浓度均随着堆肥化的进行而降低。种子发芽指数的评价结果表明：初始C／N为29时，猪粪经过49d的堆肥后达到成熟，而C／N为16的处理则需要63d以上才能达到腐熟要求。过高的盐分含量是导致低C／N条件下堆肥产品植物毒性较高的原因之一。考虑到堆肥腐熟度受多方面化学因素的影响，建议以种子发芽指数作为有机固体废物堆肥腐熟度的评价指标。

Substance Changes and Maturity Evaluation During Pig Manure Composting

The physical-chemical changes and maturity evaluation during pig manure composting at initial C/N ratio of 29 and 16 respectively were studied in this research. The results showed that the content of soluble organic C/N ratio, solid C/N ratio, dissolved organic carbon (DOC), and soluble NH + 4-N decreased after composting, which reflected the maturation process during pig manure composting. The seed germination index (GI) showed that pig manure compost at initial C/N ratio of 29 reached mature after composting for 49 days, while the compost at initial C/N ratio of 16 needed longer time than 63 days for further composting. In this study, the over-high content of salt in the compost at initial C/N ratio of 16 might contribute to the stronger phytotoxicity. Maturity of compost was influenced by lots of factors, so using a single chemical index for its evaluation was unilateral and unscientific. The seed germination index is the recommended index for maturity evaluation of solid organic waste compost.