常温厌氧污泥消化的停留时间分析.doc

中国环境科学 CHINA ENVIRONMENTAL SCIENCE 1998 年第 18卷第3期 1998 科技期刊常温厌氧污泥消化的停留时间分析王世和(东南大学环境工程系,南京 210096) 远藤郁夫(早稻田大学,日本) 文摘通过对 25℃下城市污泥常温厌氧消化过程的产气率、 pH值、挥发酸、有机物分解率、消化速度常数等的测定,引入“微生物污泥(Active Biological Solids) ”概念,进行了常温厌氧消化过程的动力学分析。结果表明,常温消化的反应速度、产气率、有机物分解率均明显低于高、中温消化。为获得同一程度的产气率和有机物分解率,常温消化需 150 天以上的停留时间,而中、高温则为 12~30天。常温污泥消化的基质浓度与消化速度关系不同于合成基质,呈 S型,可采用 Moser 模型模拟其动力学过程; n=2 时所得各项动力学常数及最小消化时间可用于常温厌氧消化过程的控制。关键词厌氧污泥消化甲烷发酵污泥处理与处置 The analysis of the retention time in the process of the normal temperature anaerobic sludge digestion. Wang Shihe (Department ofEnvironmental Engineering, Southeast University,Nanjing 210096);Ikuo Endo(WASEDA University, Japan).China Environmental ,18(3):218 ~222 Abstract —Inthis paper, the concept of“Active Biological Solids" was introduced and the analysis ics inthe process ofnormal temperature anaerobic digestion was carried out bymeans ofmeasuring the rate ofgas production, pH, the volatile acid, the degradation rate anic matter and the digestion speed constant inthe process ofurban sludge anaerobic digestion in25℃.The results demonstrate that the reaction speed, the rate ofgas production and the degradation rate anic matter innormal temperature digestion are obviously lower than those inhigh ormiddle temperature. To reach the same degree inthe rate ofgas production and degradation rate anic matter, the retention time for normal tem