【摘要】 分析不同营养水平下生物黏泥形成的动力学过程,利用扫描电镜技术,在进行黏泥微观结构分析的基础上,考察杀菌剂对不同营养水平下黏泥的灭活过程及效果。结果表明:营养水平的高低直接影响着黏泥形成动力学过程及Logistic模型方程中的各参数值;营养水平越高,黏泥生长初期附着诱导期耗时越短,对数增长期、稳定期的黏泥生成量越大;进入稳定期的黏泥,其脱氢酶活性由高到低依次为中营养,富营养,贫营养;氧化型与非氧化型杀菌剂对黏泥的有效灭活作用时间均与黏泥生长的营养水平有关,这是由黏泥的厚度及微观结构差异所致,而不是仅受黏泥初始活性影响。更多还原

【Abstract】 To understand the formation mechanism and treatment methods of biofouling in recirculated water,the kinetics process of biofouling development at different nutrient levels and corresponding inactivation performance of biocides were investigated applying scanning electron microscopy(SEM).The results show that the levels of nutrient have a significant influence upon the kinetics process of biofouling formation,as well as the parameters of Logistic model.The improved nutrient levels lead to the decrease of biofouling initial attachment period but the increase of logarithmic phase and eventual stable biomass.Furthermore,the dehydrogenase activity(DHA) of mature biofouling is relevant to the nutrient levels with the order of moderate level>adequate level>barren level.The effective acting time and inactivation performance were influenced by not only the initial DHA but also the thickness and microstructure of biofouling.更多还原