매립지 침출수 처리에서 질산화 공정 최적화 : pH 및 무기탄소원농도가 질소 제거에 미치는 영향
Optimizing Nitrification in Landfill Leachate Treatment: Effects of pH and Inorganic Carbon Source Concentration on Nitrogen Removal
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초록
본 연구는 국내 경제 성장에 따른 폐기물 발생량 증가와 성분 다양화로 인해 발생하는 매립지 침출수의 질산화 공정에서 나타나는 문제점을 해결하고자 수행되었다. 매립지 침출수는 높은 농도의 질소화합물과 유기물질을 포함하고 있어 환경오염의 잠재적 원인이 된다. 연구 결과, 금속(Cu) 농도가 2.5ppm 이상일 때 질산화 공정이 저해되며, 알칼리도 보충과 pH 조절을 통해 질산화율을 크게 개선할 수 있음을 확인하였다. 또한, 적정 DO와 pH만으로는 질산 화에 충분한 영향을 미치지 못하였다. 본 연구는 매립지 침출수 처리 공정에서 화학약품 사용을 최소화하고 2차 독성물질 발생을 억제할 수 있는 새로운 처리 기술 개발에 기여할 것으로 기대된다.
Abstract
This study was conducted to solve problems that arise in the nitrification of landfill leachate due to the increase in waste generation and diversification of components associated with domestic economic growth. Landfill leachate contains high concentrations of nitrogen compounds and organic substances thus, it is a potential cause of environmental pollution. The study findings confirmed that the nitrification process was inhibited when the metal ( ) concentration was more than 2.5ppm: further, the nitrification rate could be greatly improved by replenishing alkalinity and adjusting pH. Additionally, appropriate and pH alone did not have a sufficient effect on nitrification. This study is expected to contribute to the development of new treatment technology that can minimize the use of chemicals and suppress the generation of secondary toxic substances in the landfill leachate treatment process.
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