Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio 45221-0006.
Appl Environ Microbiol. 1985 Dec;50(6):1395-403. doi: 10.1128/aem.50.6.1395-1403.1985.
Various physical and chemical parameters were monitored to evaluate their influence on the microbial communities present in composting municipal sewage sludge. Temperature, moisture content, depth, pH, protein content, total nitrogen, total carbon, lipid phosphate biomass, and the rates of microbial incorporation of substrates into lipids were measured at several times throughout the 17- to 19-day composting runs. Temperature was found to have the most consistent and dramatic effect on microbial activity and biomass. When temperatures exceeded 55 to 60 degrees C, microbial activity fell dramatically, usually by more than 1 order of magnitude. Microbial activity was generally greatest in samples taken from the 35 to 50 degrees C areas of the composting piles. Changes in the composition of the compost over time included increased pH, increased protein content, and decreased total organic content. The changes in these parameters appeared to reflect the microbial activity and biomass present. The results of this study indicate that the rate of composting may best be optimized by controlling the composting temperatures, provided that the other parameters fall within reasonable limits in the starting material.
监测了各种物理和化学参数，以评估它们对堆肥城市污水污泥中存在的微生物群落的影响。在 17 至 19 天的堆肥过程中，多次测量了温度、水分含量、深度、pH 值、蛋白质含量、总氮、总碳、磷脂生物量以及微生物将底物掺入脂质的速率。发现温度对微生物活性和生物量的影响最一致且最剧烈。当温度超过 55 至 60 摄氏度时，微生物活性会急剧下降，通常下降超过 1 个数量级。微生物活性通常在堆肥堆中 35 至 50 摄氏度区域采集的样品中最大。随着时间的推移，堆肥成分的变化包括 pH 值升高、蛋白质含量增加和总有机含量降低。这些参数的变化似乎反映了存在的微生物活性和生物量。这项研究的结果表明，通过控制堆肥温度可以使堆肥的速度达到最佳，前提是起始材料中的其他参数处于合理范围内。
