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김진수,신총수,이상일 대한환경공학회 2018 대한환경공학회지 Vol.40 No.1
본 연구에서는 전기응집을 이용하여 냉각수의 구리를 제거하고자 하였다. 전기응집 실험에 앞서 냉각탑 가동에 따른냉각수의 구리 농도, 경도, pH, 전기전도도를 모니터링 하였다. 냉각탑이 가동될수록 구리 및 경도 물질이 농축되는 현상을확인할 수 있었으며 전기전도도와 높은 상관관계를 나타냈다. 전기응집은 전극 17쌍, 전극간격 0.3 cm, 전류밀도 0.0167 A/cm2으로 진행하였으며, 냉각수가 일정수준의 전기전도도를 나타내기 때문에 별도의 전해질은 추가하지 않았다. 실험결과HRT (hydraulic retention time)가 증가할수록 구리 제거율이 증가하였다. pH는 별도의 약품주입 없이도 pH 8 부근으로 조정되는 것을 확인할 수 있었다. 전기전도도의 경우 처리 후 감소함을 확인할 수 있었으나 그 수준은 미미하였다. 생태독성을 확인해 본 결과, 냉각수는 처리 없이 배출하기에는 다소 높은 독성값을 나타냈으며, 전기응집 처리 후에는 독성이 크게 감소하는 것을 확인할 수 있었다. This study was conducted to treatment of copper in cooling water by using electrocoagulation. Before the electrocoagulation experiment, monitored concentration of copper, hardness, pH and conductivity in cooling water for operating cooling tower. As the cooling tower was operated, it was confirmed that copper and hardness were concentrated, and it showed a high correlation with conductivity. Electrocoagulation operation condition was 17 pairs of electrodes, 0.3 cm of electrode gap and 0.0167 A/cm2 of current density. Electrolyte need not add because the cooling water has conductivity. Electrocoagulation experiment results were showed that the copper removal efficiency increased with increasing hydraulic retention time (HRT). It was confirmed that pH was adjusted to about 8 without additional chemical injection. Conductivity decreased after electrocoagulation treatment but, the decreasing trend was insignificant. Checking the toxicity, the cooling water showed high toxicity and the toxicity decreased after the electrocoagulation treatment.
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Bacillus sp. 부착 여재를 사용한 여과시설의 비점오염원 처리장치 개발
이한슬 ( Han Seul Lee ),김진수 ( Jin Soo Kim ),신총수 ( Chong Soo Shin ),심상보,김달우,강민구 ( Min Koo Kang ),이상일 ( Sang Ill Lee ) 한국수처리학회 2015 한국수처리학회지 Vol.23 No.1
This study was conducted to reduce runoff by rainwater infiltration facility using attached growth with bacillus sp., which are reported to remove nitrogen and phosphorus as well as organic matter effectively. This study was investigated non-point pollutants removal efficiency of organic, nitrogen, and phosphorus in column using the media attached growth with bacillus sp.. To compare attached growth with bacillus sp. and detached media, two columns filled with perlite, zeolite, vermiculite, pumice, peat-moss was installed. In A column(attached growth with bacillus sp.), in case of infiltration velocity 30 mm/hr in high concentration of influent, it showed the removal efficiency(after aging term) is SS(suspended solid) 85.8±1.2 %, T-P(total phosphorus) 67.0±8.1 %, T-N(total nitrogen) 66.0±4.9 %, COD(chemical oxygen demand) 73.6±2.9 %, NH4+-N 72.7±3.0 %. In B column(detached media), in case of infiltration velocity 30 mm/hr in high concentration of influent, it showed the removal efficiency(after aging term) is SS 86.0±2.2 %, T-P 62.5±11.3 %, T-N 53.3±3.9 %, COD 34.6±3.7 %, NH4+-N 61.5±2.8 %. Removal efficiency of A column is better than B column. As the result from this study, using media with bacillus sp. can improve a effective removal of non-point source pollutants.
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알루미늄 전기응집을 이용한 인공구리폐수의 영향인자별 제거율 경향과연속운전 실험결과
김진수 ( Jin Su Kim ),심재훈 ( Jae Hoon Shim ),이한슬 ( Han Seul Lee ),신총수 ( Chong Soo Shin ),이상철 ( Sang Cheol Lee ),이상일 ( Sang Ill Lee ) 한국수처리학회 2015 한국수처리학회지 Vol.23 No.5
This study was conducted to evaluate the treatment of copper in wastewater by using electrocoagulation. Most of industrial wastewater has treated to physical and chemical methods because industrial wastewater has biologic toxic. Therefore, electrocoagulation belonging to the electrochemical method is being used in variety of industrial wastewater treatment. It shows mainly high removal efficiency of heavy metal and turbidity. In this study, it was evaluated to copper removal efficiency by pH, reaction time and current density through jar-test experiment. In case of pH, copper concentration was slightly decreased at higher than pH 4. In case of reaction time, copper removal efficiency was 91.6 % at reaction time in 4 minute and more than 98 % at reaction time in after 6 minute. In case of current density, copper removal efficiency was rapidly increased to 0.0058 A/cm2. Base on value of jar-test experiment, continuous operating of electrocoagulation experiment was applied the hydraulic retention time(HRT) 4 minute and current density 0.0167 A/cm2. pH of wastewater was not changed. Results, average copper removal efficiency was 74.7 % and maximum removal efficiency was 79.1 % while operating 110 minute.
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