对德克萨斯州的两个地表水进行了间歇实验，研究了单独臭氧氧化和后续生物降解对三卤甲烷（THMs）和卤乙酸（HAAs）前体的去除。测试了0.5至5 mg/mg总有机碳（TOC）的臭氧剂量。在没有预臭氧的情况下，THM前体几乎没有生物降解，而25-30%的HAA前体在没有臭氧的情况下被生物降解。臭氧氧化和生物降解相结合，去除了高达50%的THM前体和高达70%的HAA前体。在某些情况下，臭氧剂量大于目前实际使用的剂量（1 mg/mg TOC），这两种工艺结合起来可以提高去除效果。 HAA前体似乎比THM前体更易生物降解，臭氧氧化比前体生物降解更能促进HAA前体生物降解。包括19个参考文献、表格和图表。

Batch experiments with two Texas surface waters were employed to study the removal of the precursors of trihalomethanes (THMs) and haloacetic acids (HAAs) by ozonation alone and with subsequent biodegradation. Ozone doses of 0.5 to 5 mg/mg total organic carbon (TOC) were tested. Little biodegradation of THM precursors occurred in the absence of preozonation, whereas 25-30 percent of HAA precursors were biodegraded without ozonation. Ozonation and biodegradation combined removed up to 50 percent of THM precursors and up to 70 percent of HAA precursors. In some cases, ozone dosages larger than that now used in practice (1 mg/mg TOC) enhanced removal by the two processes combined. HAA precursors appeared to be more biodegradable than THM precursors, and ozonation enhanced HAA precursor biodegradation more than precursor biodegradation. Includes 19 references, tables, figures.