[Removal technology of typical odorant in drinking water].
To eliminate the odor in drinking water of one City in China, a study was performed on the typical odorant removal technology and removal processes. Its results showed that as typical odorants, ethanethiol was effectively removed by oxidation and geosmin and 2-MIB were removed by both oxidation and adsorption, but geosmin and 2-MIB's adsorption effect was better than oxidation. When thiol and thioether in raw water was less than 20 microg/L, furthermore, there was not any other odorant, potassium permanganate oxidation should be equipped with enhanced coagulations. When geosmin and 2-MIB in raw was less than 30 ng/L, activated carbon adsorption should be equipped with enhanced coagulations. When thiol and thioether in raw water was more than 20 microg/L, or geosmin and 2-MIB was more than 30 ng/L, ozone-activated carbon process should be added after the conventional water treatment process. When thiol and thioether in raw water was more than 150 microg/L, or geosmin and 2-MIB was more than 100 ng/L, preoxidation or adsorption of powder activated carbon at intake should be combined with ozone-activated carbon according to the odorant composing.
Li
Yong
Y
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. yongli05@mails.tsinghua.edu.cn
Chen
Chao
C
Zhang
Xiao-Jian
XJ
Liu
Yao
Y
Zhang
Xiao-Hui
XH
Zhu
Xiao-Hui
XH
Dai
Ji-Sheng
JS
Xu
Huan
H
D000327:Adsorption; D009284:Naphthols / Q000032:analysis / Q000302:isolation & purification; D009812:Odorants; D010084:Oxidation-Reduction; D013438:Sulfhydryl Compounds / Q000032:analysis / Q000302:isolation & purification; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis*
D009284:Naphthols; D013438:Sulfhydryl Compounds; D014874:Water Pollutants, Chemical; C007638:ethanethiol; C001278:geosmin