title: Reduction in toxicity of coking wastewater to aquatic organisms by vertical tubular biological reactor.
abstract: We conducted a battery of toxicity tests using photo bacterium, algae, crustacean and fish to evaluate acute toxicity profile of coking wastewater, and to evaluate the performance of a novel wastewater treatment process, vertical tubular biological reactor (VTBR), in the removal of toxicity and certain chemical pollutants. A laboratory scale VTBR system was set up to treat industrial coking wastewater, and investigated both chemicals removal efficiency and acute bio-toxicity to aquatic organisms. The results showed that chemical oxygen demand (COD) and phenol reductions by VTBR were approximately 93% and 100%, respectively. VTBR also reduced the acute toxicity of coking wastewater significantly: Toxicity Unit (TU) decreased from 21.2 to 0.4 for Photobacterium phosphoreum, from 9.5 to 0.6 for Isochrysis galbana, from 31.9 to 1.3 for Daphnia magna, and from 30.0 to nearly 0 for Danio rerio. VTBR is an efficient treatment method for the removal of chemical pollutants and acute bio-toxicity from coking wastewater.
authors.affiliation: Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Siyun
authors.initials: S
authors.lastname: Zhou
authors.affiliation: National Institute for Environmental Studies, Endocrine Disrupters and Dioxin Research Project, 16-2 Onogawa, Tsukuba, Ibaraki 304-8506, Japan.
authors.forename: Haruna
authors.initials: H
authors.lastname: Watanabe
authors.affiliation: Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Chang
authors.initials: C
authors.lastname: Wei
authors.affiliation: Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Dongzhou
authors.initials: D
authors.lastname: Wang
authors.affiliation: Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
authors.affiliation: National Institute for Environmental Studies, Endocrine Disrupters and Dioxin Research Project, 16-2 Onogawa, Tsukuba, Ibaraki 304-8506, Japan.
authors.forename: Norihisa
authors.initials: N
authors.lastname: Tatarazako
authors.affiliation: Faculty of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan.
authors.forename: Shigeki
authors.initials: S
authors.lastname: Masunaga
authors.affiliation: Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China. Electronic address: yzhang@dlut.edu.cn.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000818:Animals; D057919:Biological Oxygen Demand Analysis; D003077:Coke / Q000633:toxicity*; D003445:Crustacea / Q000187:drug effects; D003621:Daphnia / Q000187:drug effects; D058087:Haptophyta / Q000187:drug effects; D007220:Industrial Waste; D019800:Phenol / Q000032:analysis; D010776:Photobacterium / Q000187:drug effects; D018675:Toxicity Tests; D018505:Waste Management / Q000379:methods*; D062065:Wastewater / Q000633:toxicity*; D015027:Zebrafish
chemical_list: D003077:Coke; D007220:Industrial Waste; D019800:Phenol; D062065:Wastewater
keywords: Acute toxicity; Bio-toxicity; Daphnia; Phenol removal; Toxicity removal; Toxicity unit (TU)