Kang Kyoung-Hee, Dong Jong-In
Air Quality Control Research Division, National Institute of Environmental Research, Korea.
J Environ Monit. 2010 Apr;12(4):898-905. doi: 10.1039/b906771j. Epub 2010 Jan 20.
Until recently, nearly all sewage treatment-related regulations and researches have focused on the removal of the conventional and toxic pollutants from liquid effluents. The discharge of toxic compounds to the atmosphere has been implicitly regarded as a way of removal or destruction. During sewage treatment, the fate mechanism of volatilization/stripping, sorption and biotransformation primarily determines the fate of volatile HAPs. The objectives of this study are to investigate the emission characteristics of HAPs, which are generated from the liquid surface of sewage treatment facilities, by using an emission isolation flux chamber. HAP emissions increased at the inlet of the aerobic chamber during summer due to the relatively high atmospheric temperature. The percent ratio of flux for toluene reached its peak in winter, accounting for 33.6-34.2% of the total, but decreased to 25.1-28.6% in summer. In autumn, trichloroethene (TCE) was the highest, recording 17.6-18.1%, with chloroform and toluene showing similar levels. It seems that the ratio of chlorinated hydrocarbons increases in both summer and autumn because the chamber temperature during that time is higher than winter. This study is the initial study to investigate the emission characteristics of volatile HAPs emitted from domestic sewage treatment facilities to the air in Korea. Therefore, the isolation flux chamber will be used as an emission estimations tool to measure HAPs from sewage treatment facilities and may be applied to develop the emission factor and national source inventory of HAPs.
直到最近，几乎所有与污水处理相关的法规和研究都集中在去除液体废水中的常规和有毒污染物。向大气中排放有毒化合物一直被隐含地视为一种去除或销毁的方式。在污水处理过程中，挥发/汽提、吸附和生物转化的归宿机制主要决定了挥发性有害空气污染物的归宿。本研究的目的是使用排放隔离通量室来研究污水处理设施液体表面产生的有害空气污染物的排放特征。由于夏季气温相对较高，好氧池入口处的有害空气污染物排放量增加。甲苯通量的百分比在冬季达到峰值，占总量的33.6-34.2%，但在夏季降至25.1-28.6%。在秋季，三氯乙烯（TCE）最高，为17.6-18.1%，氯仿和甲苯的水平相似。似乎夏季和秋季氯代烃的比例都会增加，因为这段时间的池温高于冬季。本研究是韩国国内污水处理设施向空气中排放挥发性有害空气污染物排放特征的初步研究。因此，隔离通量室将用作测量污水处理设施中有害空气污染物的排放估算工具，并可用于制定有害空气污染物的排放因子和国家源清单。
