Politecnico di Milano, DIIAR - Environmental Engineering Section, P.za Leonardo da Vinci 32, 20133 Milan, Italy.
Environ Technol. 2011 Apr;32(5-6):653-61. doi: 10.1080/09593330.2010.509869.
The concentrations of organic micropollutants are usually low in wastewaters (order of magnitude of mg L(-1)). However, their emission standards, especially in the case of carcinogenic and bioaccumulating substances, are often much lower (order of magnitude of microg L(-1)). Since these substances, in some cases, can be adsorbable or volatile, their removal via volatilization, biodegradation or sludge adsorption in a wastewater treatment plant (WWTP) becomes a significant feature to include in the usual design process, in order to verify the emission standards in gas and sludge too. In this study a simple screening batch test for the evaluation of the fate of organic micropollutants in water, air and sludge is presented. The test is set up by means of simple laboratory instruments and simulates an activated sludge tank process. In this study the results obtained for four substances with different chemical properties (i.e. toluene, benz(a)anthracene, phenol and benzene) are presented. The screening test proposed can be a useful tool to assess in about one month the fate of organic micropollutants in an activated sludge tank of a WWTP. Moreover, the test can constitute a useful support in the use of mathematical models, since it allows the verification of model results and the calibration of the reactions involved in the removal process.
有机微污染物的浓度在废水中通常较低（数量级为 mg/L）。然而，它们的排放标准，特别是对于致癌和生物累积物质，往往要低得多（数量级为 μg/L）。由于这些物质在某些情况下可能是可吸附或易挥发的，因此在废水处理厂（WWTP）中通过挥发、生物降解或污泥吸附去除它们成为通常设计过程中的一个重要特征，以便验证气体和污泥中的排放限值。在本研究中，提出了一种简单的筛选批量测试方法，用于评估有机微污染物在水、空气和污泥中的归宿。该测试通过简单的实验室仪器进行设置，模拟了活性污泥池过程。在本研究中，介绍了四种具有不同化学性质的物质（即甲苯、苯并(a)蒽、苯酚和苯）的测试结果。所提出的筛选测试可以在大约一个月内评估 WWTP 中活性污泥池中的有机微污染物的归宿。此外，该测试可以为数学模型的使用提供有用的支持，因为它允许验证模型结果并校准去除过程中涉及的反应。
