초록 ▼

용어보기논문에서 용어와 풀이말을 자동 추출한 결과로, 시범 서비스 중입니다. AI-Helper

본 연구에서는 전기분해장치를 이용하여 폐수 내 질소화합물을 제거하기 위해 합성 폐수를 제조하여 운전조건을 확인하고 음식물 쓰레기 폐수에 적용하였다. 첫째로 질산성 질소 합성 폐수를 전기분해하였으며 Cathode의 종류, 염소 이온(Cl-)의 농도를 달리하여 질산성 질소의 환원, 자유염소(...

본 연구에서는 전기분해장치를 이용하여 폐수 내 질소화합물을 제거하기 위해 합성 폐수를 제조하여 운전조건을 확인하고 음식물 쓰레기 폐수에 적용하였다. 첫째로 질산성 질소 합성 폐수를 전기분해하였으며 Cathode의 종류, 염소 이온(Cl-)의 농도를 달리하여 질산성 질소의 환원, 자유염소(Free Chlorine)의 생성량 그리고 환원된 암모니아성 질소의 제거를 비교하였다. 둘째로 암모니아성 질소 합성 폐수를 전기분해하였으며 염소 이온(Cl-)의 농도, pH 조건을 달리하여 암모니아성 질소의 제거량을 비교하였다. 셋째로 실제 음식물 쓰레기 폐수의 농도와 비슷한 질산성 질소와 암모니아성 질소를 동시에 포함한 합성 폐수를 전기분해하여 최적 운전조건을 확인하였으며 이후 초기 pH를 달리한 음식물 쓰레기 폐수를 전기분해하여 pH, NO3-N, NH3-N, TN의 변화를 비교하였다.
Cathode 종류별 성능평가를 위해 Anode에 Pt-Ti, Cathode에 Cu, Zn, Brass, SUS, Al, Ni을 사용하여 질산성 질소 합성폐수를 전기분해하였으며 Cu, Zn, Brass를 전기분해에 적합한 전극으로 판단하였다. 자유 염소 생성량은 Cl- 8.5 mM까지 Cl-의 농도에 비례하여 증가하였으나 Cl- 8.5 mM 이상에서 자유 염소 생성량은 큰 차이를 보이지 않았으며 암모니아성 질소의 제거량은 Cl-의 농도에 비례하여 증가하였다.
암모니아성 질소는 낮은 pH에서 전기분해할 경우 제거되지 않았다. pH를 12로 조절하여 전기분해한 2000 mg N/L의 암모니아성 질소 합성 폐수 중 1613 mg N/L(80 %)의 NH3-N가 제거되었다.
음식물 쓰레기 폐수는 24시간동안 전기분해를 통해 NO3-N 161 mg/L(99 %), NH3-N 1225 mg/L(94 %), TN 3638 mg/L(86 %)가 제거되었으나 암모니아성 질소와 총 질소의 경우 5시간 동안 농도의 변화가 크지 않았다. pH를 12로 조절한 음식물 쓰레기 폐수는 24시간 동안 전기분해를 통해 NO3-N 161 mg/L(99 %), NH3-N 1232 mg/L(94 %), TN 3734 mg/L(88 %)가 제거되었으며 음식물 쓰레기 폐수와 비교하여 12시간 대비 1480 mg N/L(35 %)가 더 많이 제거되었다.

Abstract ▼ AI-Helper

In this study, the nitrogen compounds in wastewater were removed by using an electrolysis device. The operation conditions were investigated by electrolysis of synthetic wastewater. First, nitrate synthetic wastewater was electrolyzed with various cathodes and an anode of Pt-Ti. The effect of chlori...

In this study, the nitrogen compounds in wastewater were removed by using an electrolysis device. The operation conditions were investigated by electrolysis of synthetic wastewater. First, nitrate synthetic wastewater was electrolyzed with various cathodes and an anode of Pt-Ti. The effect of chloride ions(Cl-) was also investigated. The reduction of nitrate nitrogen, the production of free chlorine, and the removal of ammonia nitrogen were compared. Secondly, the ammonia nitrogen synthetic wastewater was electrolyzed and the removal efficient of ammonia nitrogen was compared by varying the concentration of chloride ion (Cl-) and different pH conditions. Thirdly, synthetic wastewater containing nitrate and ammonia nitrogen, which is similar to real food wastewater concentration, was electrolyzed. Changes in pH, NO3-N, NH3-N and TN were evaluated by electrolysis of food waste wastewater with different initial pH.
The nitrate synthetic wastewater was electrolyzed using Pt-Ti as the anode and Cu, Zn, Fe, Brass, SUS, Al, and Ni as the cathodes in order to evaluate the performance of each type of cathode. Cu, Zn, Fe and Brass were confirmed as suitable electrodes for electrolysis. The amount of free chlorine was increased when concentration of Cl- was increased up to 8.5 mM. The amount of free chlorine was not significantly increased when the Cl- concentration was increased to 8.5 mM or greater. The removal efficient of ammonia nitrogen was increased as the concentration of Cl- was increased.
Ammonia nitrogen was not removed by free chlorine produced by electrolysis when pH was lower than pKa value. The NH3-N of 1613 mg N / L (80 %) was removed from 2000 mg N /L ammonia nitrogen synthetic wastewater when pH adjusted to 12.
NO3-N 161 mg/L(99 %), NH3-N 1225 mg/L(94 %) and TN 3638 mg/L (86 %) were removed in the food wastewater of 100 L for 24 hours by electrolysis. In the case of ammonia nitrogen and total nitrogen, the change of concentration was not significant for 5 hours. In food wastewater with pH adjusted to 12, NO3-N 161 mg/L(99 %), NH3-N 1232 mg/L(94 %) and TN 3734 mg/L (88 %) were removed. Compared with non-pH controlled food wastewater, it was removed as much as 1480 mg N/L(35 %) by 12 hours.

주제어