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DOI : 10.17640/KSWST.2021.29.2.21 , Vol.29, No.2, 21 ~ 34, 2021
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| Title |
| Study on the Characteristics of TOC Emission by Industrial Wastewater Classification in Gwangju |
| 김연희 Yun-hee Kim , 문경란 Kyoung-ran Moon , 윤상훈 Sang-hoon Yoon , 김지혜 Ji-hye Kim , 임민화 Min-hwa Lim , 진재성 Jae-sung Jin , 양명승 Myeong-sueng Yang , 정희윤 Hee-yun Jung , 배석진 Seok-jin Bae , 정재근 Jae-keun Chung |
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| Abstract |
| In this study, 182 industrial wastewater samples obtained from Gwangju were assigned to 16 industries to investigate the characteristics of organic indexes(TOC, NPOC, CODMn, and DOC). The average CODMn and TOC concentrations by industrial wastewater classification in Gwangju in descending order were as follows : other machinery and equipment manufacturing > painting and other film treatment > textile dyeing, cleaning, and finishing processing. The correlations between TOC and CODMn, NPOC, DOC showed high positive correlation coefficients which were more than 0.8. According to the revised Water Environment Conservation Act 2020 in which CODMn from wastewater discharge facilities was replaced with TOC, a CODMN concentration of 130 mg/L in an “Na” region where the volume of wastewater discharge is lower than 2,000 m3/day, corresponds to 75 mg/L TOC, and the concentration ratio of CODMN to TOC is 1.73. The average ratio of CODMn to TOC in five metropolitan cities (Gwang, Ulsan, Daejeon, Incheon, and Busan) was 1.55, and the converted TOC concentration corresponding to 130 mg/L CODMn was 84 mg/L. The average measurement ratio of CODMn to NPOC was 1.7, which was close to the CODMn to TOC ratio of 1.73. These results propose that TOC concentration in wastewater discharge from “Na” regions should be changed to 84 mg/L from the current 75 mg/L or TOC concentrations might be applicable to NPOC concentrations in all wastewater discharge facilities. |
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| Key Words |
| CODMn, Correlation coefficients, Industrial wastewater, NPOC, Organic indexes, TOC, 화학적산소요구량, 상관관계, 산업폐수, 비정화성 유기탄소, 유기물질 지표, 총유기탄소 |
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