Lou Jie C, Chan Hung Y, Yang Chih Y, Tseng Wei B, Han Jia Y
a Institute of Environmental Engineering , National Sun Yat-Sen University , Kaohsiung City , Taiwan.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2014;49(14):1693-700. doi: 10.1080/10934529.2014.951237.
This study focused on reducing the haloacetic acid (HAA) concentrations in treated drinking water. HAA has been thought to be one possible nutrient supporting heterotrophic bacteria regrowth in drinking water. In this study, experiments were conducted using a pilot-scale system to evaluate the efficiency of biological filters (BF) for reducing excess HAA concentrations in water. The BF system reduced the total HAA concentration and the concentrations of five HAA species in the water. Dichloroacetic acid (DCAA), monobromoacetic acid (MBAA) and dibromoacetic acid (DBAA) were the three main HAA5 species that were present in the treated drinking water in this investigation. Combined, these three species represent approximately 77% of the HAA5 in the finished water after BF. The verification of the empirical HAA equation for the outlet in the BF system indicated linear relationships with high correlation coefficients. The empirical equation for the HAA5 concentrations in the finished water was established by examining other nutrients (e.g., dissolved organic carbon (DOC), ultraviolet absorbance at 254 nm wavelength (UV254), and ammonia nitrogen) that can reduce pathogenic contamination. These findings may be useful for designing advanced processes for conventional water treatment plants or for managing water treatment and distribution systems for providing high-quality drinking water.
本研究聚焦于降低处理后饮用水中的卤乙酸（HAA）浓度。HAA被认为是支持饮用水中异养细菌再生长的一种可能营养素。在本研究中，使用中试规模系统进行实验，以评估生物滤池（BF）降低水中过量HAA浓度的效率。BF系统降低了水中总HAA浓度以及五种HAA种类的浓度。二氯乙酸（DCAA）、一溴乙酸（MBAA）和二溴乙酸（DBAA）是本研究中处理后饮用水中存在的三种主要HAA5种类。这三种种类合计约占BF处理后成品水中HAA5的77%。对BF系统出口处经验性HAA方程的验证表明其具有高相关系数的线性关系。通过研究其他可减少致病污染物的营养素（例如，溶解有机碳（DOC）、254 nm波长处的紫外线吸光度（UV254）和氨氮），建立了成品水中HAA5浓度的经验方程。这些发现可能有助于为传统水处理厂设计先进工艺，或用于管理水处理和分配系统以提供高质量饮用水。
