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Behavior of Endocrine Disrupting Nonylphenol in Sewage Treatment Plant

污水处理厂中壬基酚内分泌干扰物的行为

基本信息

批准号：
13650606
负责人：
TANAKA Shuzo
金额：
$ 1.98万
依托单位：
Meisei University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

The purpose of this study is to investigate the behavior of alkylphenol (AF) suspected of endocrine disrupting effects at a combined sewage treatment plant (STP) and at Tama river receiving effluents from several STPs in both dry and wet weather.In the influent of the STP, 4-t-butylphenol (BP) was detected in the range of 0.1-0.2 μg/L, 4-t-octylphenol (OP) of 0.2-0.4 μg/L and nonylphenol (NP) of 2.8-7.5 μg/L in dry weather. Most of OP and NP were adsorbed on the suspended solids (SS). Side stream from the sludge treatment process contained 0.8-1.7 μg/L of OP and 18.6-44.2 μg/L of NP. The effluent contained no BP, 0.0-0.1 μg/L of OP and 0.7-1.4 μg/L of NP resulting in removal rates of 100% in BP, 75% in OP and 85 % in NP toward the sum of the influent and the side stream. On the other hand, the concentration of NP in wet weather was 3.1 times higher in the influent and 1.6 times higher in the effluent than those in dry weather.Waste activated sludge (WAS) contained 0.07-0.26 μg/g DS of OP and 0.86-3.57 μg/g DS of NP and the mixed sludge (MS) of WAS and primary sludge (PS) did 0.02-0.06 μg/g DS of OP and 0.39-1.86 μg/g DS of NP. The WAS was 2-3 times higher than the MS in concentration of OP and NP.In Tama river, NP was detected in the range of 0.0-0.2 μg/L at Fuchu-Yotsuya bridge in dry weather. When it was rainy on the previous day, however, the concentration of NP was three times higher at maximum than that in dry weather.It was revealed that the level of NP at the combined STP seemed to be higher in both influent and effluent by precipitation, and that the level of NP at Tama river was also affected by precipitation.

本研究的目的是调查一个联合污水处理厂（STP）和多摩河污水处理厂在干燥和潮湿天气下的内分泌干扰效应。在STP的进水中，检测到0.1-0.2 μg/L的4-叔丁基苯酚（BP），在干燥天气下，4-叔辛基酚（OP）为0.2-0.4 μg/L，壬基酚（NP）为2.8-7.5 μg/L。OP和NP大部分吸附在悬浮物（SS）上。来自污泥处理工艺的侧流含有0.8-1.7 μg/L的OP和18.6-44.2 μg/L的NP。出水不含BP，OP和NP分别为0.0-0.1 μg/L和0.7-1.4 μg/L，进水和侧流之和对BP、OP和NP的去除率分别为100%、75%和85%。另一方面，在一项研究中，在潮湿天气下，进水中NP浓度是干燥天气下的3.1倍，出水中NP浓度是干燥天气下的1.6倍，剩余活性污泥（WAS）中OP的DS为0.07-0.26 μg/g，NP的DS为0.86-3.57 μg/g，WAS与初沉污泥（PS）的混合污泥（MS）中OP的DS为0.02-0.06 μg/g，NP的DS为0.05 ~ 0.05 μ g/g，NP的DS为0.05 ~ 0.05 μg/g，NP的DS为0.05 ~ 0.05 μg/g。OP的DS为0.39-1.86 μg/g，NP的DS为0.39-1.86 μg/g。在多摩河中，干旱天气下，在府中四谷桥测得NP浓度为0.0-0.2 μg/L。然而，当前一天下雨时，NP浓度最大值比干燥时高出3倍，这表明联合STP的NP水平似乎因降水而在进水和出水中均较高，多摩河的NP水平也受降水的影响。