著者

日本製紙連合会環境保全委員会 水質総量規制検討小委員会

出版者

紙パルプ技術協会

雑誌

紙パ技協誌 (ISSN:0022815X)

巻号頁・発行日

vol.36, no.3, pp.347-356, 1982

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The measurement of COD was settled on using automatic water quality measuring apparatus in principle, when the regulation of total emission fer keeping water quality at a closed water area was applied in July, 1981.<BR>In order to give facilities for the selection of the type of apparatus to the mills falling under the regulation, Environmental Protection Committee, Japan Paper Association, carried out the field tests at five mills having set up COD meter and at mills of the same number having set up UV meter from July to November, 1981.<BR>Results are as follows:<BR>(1) At non-integrated mills of two companies, the values obtainen with COD or UV meter showed high correlations to those according to JIS, and conversion formulas could be established.<BR>(2) At integrated mills, when used COD meter, high correlation was obtained at two mills, while low or no correlation was obtained at the other two mills.<BR>It is not clear whether this difference originates in the maintenance management, the difference with the apparatus, or the quality of effluent.<BR>When used UV meter, however, high correlation was obtained at all four mills and conversion formula was established, The quality of effluent seems to be matchable with UV meter at each mill.<BR>(3) It will be required for the use of COD or UV meter to lower the amount of suspended solids in the water receiving and discharging course in the case of pulp and paper effluent.<BR>(4) It is necessary to make the maintenance management delicately when using COD meter.