堆肥及消化对城市污泥中LABs降解行为的初步研究

A PRELIMINARY DEGRADATIVE EFFECT STUDY OF COMPOSTING AND DIGESTION ON LAB S (Linear Alkylbenzenes) IN MUNICIPAL SLUDGE

对广州、深圳两城市污泥及经消化和堆肥化的污泥中ＬＡＢｓ的检测和分析表明：（１）两城市污泥中ＬＡＢｓ化合物均为合成来源，但二者的配方不同．（２）厌氧消化和好气堆肥两种处理对同碳数的ＬＡＢ所有异构体降解程度基本相近，但不同异构体之间降解速度不同，２－苯基异构体优势于其它异构体降解．（３）两种生污泥都已经历了较高程度的降解，好气堆肥能使有机质降解程度提高，而厌氧消化作用则不能．新降解程序指标［Ｉ／Ｅ］１３的有效性有待进一步研究．

Municipal sewage sludge form Guangzhou and Shenzhen were chosen to investigate the degadative effect of composting and digestion on LABs(Linear Alkylbenzenes).GC/MS analysis shows that:(1) both of the LABs are of industrial synthetic origin, but their formulations are different;(2)under the experimental conditions, no difference can be found between anerobic digestion and aerobic composting in their ability of degrading LABs, but preferential degradation is observed among different LAB isomers, 2-phenyl ismoer is degraded naturally to a higher degree prior to composting and dgestion as suggested by I/E of C 12 LAB (46% for Guangzhou and 64% for Shenzhen respectively).Aerobic composting can increase the degree of degradation, while anaerobic digestion can not, the new indicator I/E of C 13 LAB proposed in this study is not a good degradation indicator.