굴패각을 충진제로 이용하는 생물학적 오수처리방안 연구 = A Study on Biological Sewage TreatmentUsing Oyster Shells as Media

다국어 초록 (Multilingual Abstract)

The purpose of this study was to develope the economical sewage treatment technology using oyster shells as biological contact media. As the stage of feasibility test in laboratory scale, the new submerged media processes with media-filling ratios of 20% and 55% were compared with the conventional activated process. Comparison parameters were the performance characteristics such as organic, nitrogen, phosphorus removal efficiencies. Operating conditions in terms of hydraulic retention time varied at 12 hr, 10 hr, and 8 hr. The results were as follows;
1.Removal efficiencies of organics such as BOD and COD showed almost the same in activated sludge and submerged oyster shell processes. The different filling ratios in submerged process showed also the same organic removal characteristics.
2.Nitrogen removal efficiencies showed that the submerged oyster shell process were better than activated sludge process. However, the different filling ratios in submerged process showed almost the same nitrogen removal characteristics.
3.Phosphorus removal efficiencies showed almost the same in activated sludge and submerged oyster shell processes. The increasing filling ratios in submerged process showed the little improvement of phosphorus removal efficiency.

목차 (Table of Contents)

• Ⅰ.서론
• 1.연구배경
• 2.연구의 목적 및 내용
• Ⅱ.실험장치 및 방법
• 1.실험장치
• 2.시료조제
• 3.실험방법
• 4.분석방법
• Ⅲ.결과 및 고찰
• 1.유기물질 제거 효과
• 2.영양염류 제거 특성
• 3.pH의 변화
• Ⅳ.결론