本研究旨在进一步阐明藻类和异养生物在改变储层可溶性有机碳池中三卤甲烷（THM）前体的性质和丰度方面可能发挥的作用。一些研究人员认为，饮用水THM生成潜力（THMFP）存在明确的季节性变化，在较温暖的月份变化最大。其他人则评估了储层藻类作为THM前体池贡献者的重要性。明矾混凝可将THM前体物质减少约50%，其有效性似乎不会因湖泊中藻类或细菌种群密度的变化而改变。 然而，当水库中的生物活性较高时，处理后残留的溶解有机碳中的三卤甲烷产量通常较高。强烈的生物活动引起的日变化可能会影响水处理厂生产THM水平始终低于最大污染物水平的水的能力。包括18个参考文献、表格、图表。

This study was conducted to clarify further the roles that algae and heterotrophic organisms could play in altering the nature and abundance of trihalomethane (THM) precursors present in the pool of soluble organic carbon in reservoirs. Some investigators felt that there were definite, seasonal variations in drinking water THM formation potential (THMFP), with the greatest variation during the warmer months. Others have evaluated the significance of reservoir algae as contributors to the THM-precursor pool. Alum coagulation reduced THM precursors by about 50 percent, and its effectiveness did not appear to be altered by variations in algal or bacterial population densities in the lake. Yields of THMs from the dissolved organic carbon that remained after treatment, however, were generally greater when biological activity in the reservoir was high. Diurnal variations caused by intense biological activity could affect the ability of a water treatment plant to produce water with THM levels consistently less than the maximum contaminant level. Includes 18 references, tables, figures.