매립년한에 따른 침출수의 혐기성 생분해 특성

• 영문명: Anaerobic Biodegradability of Leachates Generated at Landfill Age
• 발행기관: 유기성자원학회
• 저자명: 신항식(Hang-Sik Shin) 이채영(Chae-young Lee) 강기훈(Ki-hoon Kang)
• 간행물 정보: 『유기물자원화』제8권 제1호, 90~96쪽, 전체 7쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2000.03.30

국문 초록

침출수성상은매립폐기물，매립년한및매립방식에따라상이한차이를보이고있으나일반적으로용존성유기물과암모니아성 질소의 농도가높으며，인의 농도는낮은것으로나타났다 초기 매립지에서 발생되는침출수 A는높은 BOD5/COD 비(0.8)를보였으나매립이 종료된 매립지에서 발생되는침출수 C는상대적으로 매우낮은 BOD5/COD 비(0.1)를 나타내고 있다.침 출수A， B 및 C의 최대 생화학적 메탄수율과 혐기성 생분해도는각각 271 ，106 및 4 찌 CH4Ig-COD와 75，30 및 1%로나타났다. 즉，초기 매럽지에서 발생되는침출수는상대적으로높은생분해도특성을보여 혐기성 처리가효과적인것으로판단되나매립년한이 오래된매립지에서 발생하는침출수는유기물질이 생물학적으로분해가어려운리그닌，휴익 또는펄빅성의 고분자물질로주로구성되어 매우낮은혐기성 생분해 특성을보였다.침출수농도증가에 따라 미생물의 지체기가증가하는경향을보이며，특히，침출수A의 경우농도가 25%써보다큰경우지체기가급격히 증가하였다.이와같은결과는적응되지 않은미생물을식종물질로이용하는경우고농도의 침출수를처리시 장기간의 초기 운전기간이 소요될 것으로판단된다.침출수농도 50%(v/v)에 이상을첨가한경우장기간의 지체기는 50% 미만의 침출수를첨가한경우대부분의 저해물질이 희석되었기 때문으로판단된다.그리고침출수농도증가에 따라지체기의 증가뿐만아니라메탄수율및 메탄발생율이 점차감소하는경향을보이고있어 침출수혐기성 처리시 충격부하뿐만아니라정상상태에서의 저해물질에 대한잠재적인 저해현상이예상된다.

영문 초록

The ∞mposition of leachates varies depending on the waste characteristics， landfìll age and landfìlling method. Generally, leachates comain high dissolved organic substance and ammonia nitrogen whereas phosphorus concentration was very low. Leachate A produced from young landfill is characterized by high BOD5/COD ratio (0.8) whereas leachate C produced from old landfìll has lower BOD5/COD ratio (0.1). Maximurn biochemical methane potential of leachate A, B (fÌom medium landfìll) and C were 271, 106 and 4ml CH4/gCOD, respectively. On the other hand, the maximurn bioderadabiliry of leachate A, B, and C were 75, 30, and 1%, respectively. These results indicared thar anaerobic rreatmenr of leachare fÌom young landfìll was effective in removing organic pollutants. In case ofleachare C, carbon might reside in the form of large molecular weight organic compounds such as lignins，humic acids and other polymerized compounds of soils, which are resistant to biodegradation. The lag-phase period increased with the increasing organic concentration in leachate. In case of leachate A of concenrration greater than 25%, the lag-phase period increased sharply. This implied that the start-up period of anaerobic process using an unacclimated inoculum could be extended due to the higher concentration of leachate. This relatively long lag-phase is probably related to the fact that most of the inhilbitory compounds have been diluted beyond their inhibatory concenrrations of less than 50%. Furthermore, the ultinate methane yield and methane produαion rate dεcreased as 1∞chate concemration increased. It was anticipated the potential inhibition was related with the steady-state inlùbition as well as the initial shock load.

목차

1. 서론

2. 실험재료 및 방법

3. 실험결과 및 고찰

4. 결론

키워드

혐기성 생분해도 생화학적 메탄수율 저해 지체기 침출수 Anaerobic biodegradabiliry biochemical methane potential inhibition lag-phase leachate