Journal of Water and Environment Technology
Online ISSN : 1348-2165
ISSN-L : 1348-2165
Original Papers
Whole Effluent Toxicity Assessment of Industrial Effluents in Toyama, Japan with a Battery of Short-term Chronic Bioassays
Takashi KUSUIYuri TAKATAYasuyuki ITATSUJinmiao ZHA
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2014 Volume 12 Issue 1 Pages 55-63

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Abstract

Eight industrial effluents from Toyama Prefecture, Japan were subjected to three freshwater short-term chronic assays to analyze the potential of ecotoxic impact on receiving water. Tests comprised algal inhibition (Pseudokirchneriella subcapitata), crustacean reproduction (Ceriodaphnia dubia), fish embryo-larva (Danio rerio). Among the eight effluents, chronic toxic effects on alga, crustacea and fish were observed in six, six and one effluents respectively. No-observed-effect concentrations (NOECs) equal to or less than 5% were found in five samples. Nickel and salts were suspected as the causative factors from comparing water parameters with their effects. The impact of these effluents after discharged into receiving water is discussed. The results of the study show the effectiveness of the whole effluent toxicity approach to compensate the present shortcoming of wastewater regulation in Japan.

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© 2014 Japan Society on Water Environment
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