降解2-氯酚的厌氧污泥驯化及降解性能评价

以降解2-氯酚（2-CP）的厌氧污泥为研究对象，探讨驯化过程对污泥降解能力的影响，并采用多种指标全面评价驯化后污泥的降解特性．结果表明，经68d驯化，污泥对2000mg／LCOD和25mg／L2-CP的去除率均〉95％，2-CP的降解速率达0．3mg／（L·h）．对于浓度〈140mg／L的2-CP,降解速率随浓度增加而升高；浓度为200-300mg／L的2-CP,污泥能较快恢复降解能力，但不耐受600mg／L的2-CE2-CP厌氧降解产物包括苯酚、苯甲酸、正丁酸、乙酸、H2、C02和CH4-氯酚脱氯是整个降解环节中的限速步骤，速率仅为0．1mg／（gVSS·d）．

高效重质石油降解菌群构建及降解性能评价

基于重油污染场地生物修复需求,本研究成功构建了高效重油降解混合菌群并通过降解前后重油组分结构及官能团的变化对混合菌群的降解性能进行评价。结果表明,混合菌群的结构在重油降解的不同阶段有明显差异。Pseudomonas、Reyranella、Parvibaculum和Pseudoxanthomonas等菌属在重油降解过程中先后起到主要作用,其中Parvibaculum和Pseudoxanthomonas属的功能菌在重油重质组分的降解中或起主要作用。经过对重油降解混菌长期连续强化培养,可使50天内重油降解率由25.42%提升至41.57%。将不同来源富集获得的四种重油降解混合菌群复配得到了QM混合菌群,20天和50天内重油降解率可分别达到42.31%和53.48%,同时50天沥青质降解率可达25.56%。经过菌群降解后重油内轻质组分及甲基、亚甲基等轻质基团含量大幅度下降,同时重质组分的饱和度增大、多环结构被活化、酯、醚等含氧重质组分实现轻量化,实现了高效且稳定的重油生物降解。

Performance evaluation of anti-radiation based on the gamma degradation process

In the environment of space radiation, the high-energy charged particles or high-energy photons acting on a spacecraft can cause either temporary device degradation or permanent failure. The traditional probability model is difficult to obtain reliable estimation of unit radiation resistance performance with small samples. Considering that different products will change differently after high-energy particle radiation, we construct a model based on the gamma degradation process. This model can efficiently describe the law of unit radiation resistance variation with the total radiation dose levels under the effect of the total dose and displacement damage. Finally, the proposed model is used to assess the anti-radiation performance of the N-channel power MOSFET device STRH60N20FSY3 produced by STM to obtain average unit radiation resistance, survival probability, survival function, etc.