| Removal of cyclops in pre-oxidizing cooperation water treatment process |
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| 作者姓名： | LIU Dong-mei CUI Fu-yi WU Ya-qin LIN Tao ZHANG Min YU Ming-xue |
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| 作者单位： | LIU Dong-mei1，2，CUI Fu-yi1，2，WU Ya-qin1，LIN Tao3，ZHANG Min1，YU Ming-xue1 (1School of Municipal and Environmental Engineering，Harbin Institute of Technology，Harbin 150090，China) (2State Key Laboratory of Urban Water Resource and Environment，Harbin 150090，China) (3College of Environmental Science and Engineering，Hohai University，Nanjing 210098，China) |
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| 基金项目： | Project supported by the Hi-Tech Research and Development Program （863） of China （No. 2006AA06Z311）, the Postdoctoral Science Foundation of Heilongjiang Province （No. LRB05-164）, and the Excellent Young Teacher Encouragement Project Foundation of HIT （No. HIT2006）, China |
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| 摘 要： | Zooplankton cyclops propagates profusely in waterbody, cannot be effectively inactivated by conventional disinfec- tion process, and becomes a troublesome drinking water treatment problem. In this work, the qualitative and quantitative ex- perimental studies were carried out on inactivation of zooplankton cyclops using oxidants, such as chlorine (Cl2), chlorine dioxide (ClO2), ozone (O3), hydrogen peroxide (H2O2), ozone/hydrogen peroxide (O3/H2O2), chloramines (Cl2-NH3) and potassium permanganate (KMnO4). The influences of various factors include different oxidant dosages, organic substance contents and pH values. The results showed that currently available oxidants used all might inactivate cyclops in some extent. According to the experimental results, chlorine dioxide, ozone, ozone/hydrogen peroxide and chloramines can be selected as effective oxidants for inactivating cyclops because of their strong inactivation abilities. Then the synergic removal effects on cyclops with ozone, ozone/hydrogen peroxide pre-oxidation followed by conventional water treatment processes were investigated. The results showed that ozone and ozone/hydrogen peroxide pre-oxidation can inactivate cyclops effectively, which then can be removed thoroughly by conventional water treatment processes. Cyclops cannot appear in water after filtration with 1.65 mg/L of ozone and 6 mg/L of hydrogen peroxide, with the inactivation rate being 62% before conventional water treatment processes. Cyclops cannot appear in water after filtration with 1.8 mg/L of ozone, with the inactivation rate being 50% before conventional water treatment processes. For different oxidants, when removal rate was the best, the inactivation rate was not the same. These results may pro- vide reference and model for actual waterworks.
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| 关 键 词： | 浮游动物 水处理 钝化作用 水质 |
| 收稿时间： | 22 January 2007 |
| 修稿时间： | 2007-01-22 |
Removal of cyclops in pre-oxidizing cooperation water treatment process |
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| LIU Dong-mei CUI Fu-yi WU Ya-qin LIN Tao ZHANG Min YU Ming-xue.Removal of cyclops in pre-oxidizing cooperation water treatment process[J].Journal of Zhejiang University Science,2007,8(11):1826-1830. |
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| Authors: | Liu Dong-mei Cui Fu-yi Wu Ya-qin Lin Tao Zhang Min Yu Ming-xue |
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| Institution: | (1) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China;(2) State Key Laboratory of Urban Water Resource and Environment, Harbin, 150090, China;(3) College of Environmental Science and Engineering, Hohai University, Nanjing, 210098, China |
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| Abstract: | Zooplankton cyclops propagates profusely in waterbody, cannot be effectively inactivated by conventional disinfec- tion process, and becomes a troublesome drinking water treatment problem. In this work, the qualitative and quantitative ex- perimental studies were carried out on inactivation of zooplankton cyclops using oxidants, such as chlorine (Cl2), chlorine dioxide (ClO2), ozone (O3), hydrogen peroxide (H2O2), ozone/hydrogen peroxide (O3/H2O2), chloramines (Cl2-NH3) and potassium permanganate (KMnO4). The influences of various factors include different oxidant dosages, organic substance contents and pH values. The results showed that currently available oxidants used all might inactivate cyclops in some extent. According to the experimental results, chlorine dioxide, ozone, ozone/hydrogen peroxide and chloramines can be selected as effective oxidants for inactivating cyclops because of their strong inactivation abilities. Then the synergic removal effects on cyclops with ozone, ozone/hydrogen peroxide pre-oxidation followed by conventional water treatment processes were investigated. The results showed that ozone and ozone/hydrogen peroxide pre-oxidation can inactivate cyclops effectively, which then can be removed thoroughly by conventional water treatment processes. Cyclops cannot appear in water after filtration with 1.65 mg/L of ozone and 6 mg/L of hydrogen peroxide, with the inactivation rate being 62% before conventional water treatment processes. Cyclops cannot appear in water after filtration with 1.8 mg/L of ozone, with the inactivation rate being 50% before conventional water treatment processes. For different oxidants, when removal rate was the best, the inactivation rate was not the same. These results may pro- vide reference and model for actual waterworks. |
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| Keywords: | Cyclops of zooplankton Water treatment Inactivation O3 O3/H2O2 pre-oxidation |
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