튜브형 전기응집 시스템에 의한 산업폐수의 처리특성 = Treatment of Industrial Wastewater by Tube Type Electrocoagulation Systems

국문 초록 (Abstract)

본 연구의 목적은 튜브형 전기웅집 시스템을 이용하여 도금폐수, 염색폐수, 피혁폐수, 제지폐수 및 자동차부품 제조폐수를 처리하고 각 폐수별 오염물질의 제거효율과 적정 운전조건 및 제거특성을 파악하고자 하였다. 튜브형 전기웅집 시스템에 의한 도금폐수의 제거효율은 중금속인 Zn이 96.3%, Cu가 93.8% 및 Cr 이 99.5%로 높았고, 염색폐수의 제거효율은 COD 이 81.9%, COD 이 51.5% 및 색도가 89.4%이었다. 피혁폐수의 제거효율은 COD 이 40.5%, DOD 이 77.0%이었고, 제지폐수의 제거효율은 Ca 이 88.5%, Mg 이 87.7% 및 Na 이 63.9%이었으며, 자동차부품 제조폐수의 제거효율은 n-hexane 추출물질이 97.7%, ABS가 68.8%이었다. 적정 전류밀도는 도금폐수가 39.1∼68.5 ㎃/㎠, 염료폐수가 48.9∼73.4 ㎃/㎠, 피혁폐수가 18.2∼30.6 ㎃/㎠, 제지폐수가 45.7∼78.3 ㎃/㎠ 그리고 자동차부품 제조폐수가 40,8∼53.8㎃/㎠이었다. 적정 체류시간은 대부분 5∼13sec로 아주 짧았다. 다른 유형의 전기분해 시스템과 비교해 볼 때 상대적으로 낮은 전류밀도와 체류시간의 운전으로 높은 효율을 나타내었다.

다국어 초록 (Multilingual Abstract)

The objective of this study is to assess removal efficiency, optimum operating conditions and removal characteristics of plating, dye, leather manufacture, paper manufacture and car parts manufacture wastewter by tube type electrocoagulation systems. The removal efficiency of plating wastewater by electrocoagulation treatment was 96.3% for Zn, 93.8% for Cu, and 99.5% for Cr , respectively. The removal efficiency of heavy metals was very high. The removal efficiency of dye wastewater by electrocoagulation treatment was 81.9% for DOD , 51.5% for COD , and 89.4% for color. For other wastewater, the removal efficiency of leather manufacture wastewater was 40.5% for COD and 77.7% for DOD . On paper manufacture wastewater, it was 88.5% for Ca , 87.7% for Mg and 63.9% for Na . On car parts manufacture wastewater, the removal efficiency was 97.7% for n-hexane extracts and 68.8% for ABS, respectively. The most efficient current density of plating wastewater for electrocoagulation treatment was evaluated as the range of 39.1∼68.5 ㎃/㎠. For dye wastewater it was 48.9∼73.4 ㎃/㎠, and 18.2∼30.6 ㎃/㎠ for leather manufacture wastewater. On paper manufacture wastewater, the most efficient current density was inthe range of 45.7∼78.3 ㎃/㎠ and 40.8∼53.8 ㎃/㎠, for car parts manufacture wastewater, respectively. Required retention time for wastewater treatment by electrocoagulation systems was 5∼13sec. Operation conditions compared with other type electrolysis systems was more efficient especially in current density and required retention time.