title: [Removing efficiency study on Cyclops cooperating with water treatment process by alternative oxidants].
abstract: The synergic removal effect on Cyclops was studied with 4 kinds of dosages of pre-oxidants such as chloramines, chlorine, O3 and potassium permanganate composite followed by different sets of clarification treatment process pilot systems. The removal mechanisms of Cyclops in different treatment units were analyzed. The experiments results show that the inactivation rate of chlorine (25%) is the highest compared with the chloramines (21%), potassium permanganate composite (8%) and O3 (9%) in the pre-oxidation stage, while the removal rate is changed after the filtration and the sequence is chloramines (90%) > chlorine (88%) > O3 (83%) > potassium permanganate composite (80%). Only chloramines can remove Cyclops by 100% of removal rate with the treatment process with the conventional active carbon unit. The 100% of removal effect doesn't depend on the highest inactivation rate,but the reasonable cooperation between the pre-oxidation and the clarification treatment process. The size of Cyclops and its life activity are the important influencing factors. The individual removal rate of filtration unit is the highest with no lower than 50%. The removal effect of air-flotation unit is influenced by the size of Cyclops and its life activity.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. zmin_2008@163.com
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
authors.forename: Fu-yi
authors.initials: FY
authors.lastname: Cui
authors.forename: Dong-mei
authors.initials: DM
authors.lastname: Liu
authors.forename: Wen-jie
authors.initials: WJ
authors.lastname: He
authors.forename: Hong-da
authors.initials: HD
authors.lastname: Han
mesh_terms: D000818:Animals; D002700:Chloramines / Q000737:chemistry; D002713:Chlorine / Q000737:chemistry; D033342:Copepoda / Q000187:drug effects* / Q000254:growth & development; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D002700:Chloramines; D016877:Oxidants; D014874:Water Pollutants, Chemical; D002713:Chlorine; D010126:Ozone; C030816:chloramine