Analysis on the Actual Conditions of Wastewater Treatment Facilities in Chungcheongnam-do Province Industrial Complexes

충청남도 산업단지의 오·폐수처리실태 분석

  • Lim, Bong-Su (Department of Environmental Engineering, Daejoon University) ;
  • Kim, Do-Young (Department of Environmental Engineering, Daejoon University) ;
  • Yi, Sang-Jin (Total Water Pollution Load Management Center, Chungnam Development Institute) ;
  • Oh, Hye-Jung (Total Water Pollution Load Management Center, Chungnam Development Institute)
  • 임봉수 (대전대학교 환경공학과) ;
  • 김도영 (대전대학교 환경공학과) ;
  • 이상진 (충남발전연구원 총량관리센터) ;
  • 오혜정 (충남발전연구원 총량관리센터)
  • Received : 2007.10.05
  • Accepted : 2007.10.29
  • Published : 2007.11.30

Abstract

This study was carried out to survey the actual conditions of wastewater treatment facilities to obtain basic data for the management of wastewater from industrial complexes in Chungcheongnam-do province. Wastewater production flow per site area by watersheds was $49.2m^3/km^2/d$ for Sapgyoho, $8.1m^3/km^2/d$ for Anseongcheon, $5.7m^3/km^2/d$ for Seohae, and $2.9m^3/km^2/d$ for Geumgang. Sapgyoho showed 75% of the total production flow, which was the highest value, Geumgang showed 4% of total flow, which was the lowest value. Average total extra rate as production flow/capacity flow in the wastewater treatment facilities for industrial complex is 49%. Considering by watersheds, the extra rates of Seohae, Geumgang, Anseongcheon, and Sapgyoho, are 73%, 65%, 62%, and 33% respectively. This means that the design of capacity flow in wastewater treatment facilities was too large. Effluent concentration of wastewater treatment facilities did not exceed discharge limit mostly. The removal efficiency rate for water quality item was 90% in BOD, 70% in COD, 80% in SS, 30 to 80% in TN, and 20 to 90% in TP, so the organic removal was good, but the nutrient removal was low and interval of variation was high. The removal efficiency rate of the agricultural was industrial complexes is lower than the national and local complexes. The construction cost of the wastewater treatment facilities in Chungcheongnam-do was $1,756Won\;per\;m^3$, treatment cost was $189Won\;per\;m^3$, and they were about two times and 1.2 times higher than the nation-wide cost, respectively. The treatment cost consists of 39% for man power, 21% for chemical, 16% for power, 11% for sludge treatment, and 13% for others.

Keywords

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