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题名: Comparison of Fe-Mn enhanced coagulation and O-3-BAC for removing natural organic matter from source waters: a case study
作者: Tian, Chuan; Liu, Feng; Bai, Yaohui; Liu, Ruiping; Chen, Hu; Wang, Bin; Qu, Jiuhui
刊名: DESALINATION AND WATER TREATMENT
出版日期: 2016-04-26
卷号: 57, 期号:20, 页码:9101-9114
关键词: O-3-BAC ; FeCl3 ; Seasonal non-point pollution ; KMnO4 ; Enhanced coagulation
DOI: 10.1080/19443994.2015.1030702
部门归属: 环境水质学国家重点实验室
英文摘要: This plant-scale investigation compared two process improvement strategies for Lianyungang drinking water treatment plant (L-DWTP), a typical plant employing conventional processes to treat source water impacted by seasonal non-point pollution. Hierarchical cluster analysis grouped it into two clusters, i.e. normal period and polluted period. Originally, the L-DWTP exhibited poor organic matter removal efficiency, and 76.7% of the effluent permanganate index (CODMn) levels exceeded the state regulation requirement (<3mg/L). In addition, chloroform concentration was observed to exceed the regulation requirement (60 mu g/L) by 14.2 and 56.2% in normal and polluted periods. The combined use of FeCl3 and KMnO4 (Fe-Mn enhanced coagulation) increased the CODMn removal efficiency by 10.6%, and decreased the chloroform formation by 26.4%. It indicates that about 94.5% of effluent CODMn values and nearly all of chloroform levels may meet the standard in normal period. However, Fe-Mn enhanced coagulation shows limitation in polluted period. The advanced treatment by ozone-biological activated carbon process (O-3-BAC) increases the CODMn removal efficiency by 29.5%, and decreases the chloroform formation by 43%, indicating that effluent levels may meet the standard both in normal and polluted periods. Cost was also compared, and the extra cost for Fe-Mn enhanced coagulation is only about 20% of that for O-3-BAC. In conclusion, O-3-BAC works well both in normal and polluted periods. Fe-Mn enhanced coagulation only shows good performance in normal period, but is more economical. Therefore, it is proposed to use Fe-Mn enhanced coagulation in normal period, while O-3-BAC during polluted period. These obtained plant-scale data are valuable to optimize the operation of DWTPs with similar challenges.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36020
Appears in Collections:环境水质学国家重点实验室_期刊论文

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