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청정기술 = Clean technology, v.19 no.4, 2013년, pp.355 - 369
김동진 (한림대학교 환경생명공학과.에너지환경연구소)
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Economic feasibility is one of the most important factors in energy production from regenerative biomass. From the aspect, biogas from anaerobic digestion of wastewater sludge is regarded as the most economical because of its cheap substrate and additional income from the disposal of waste sludge. S...
| 핵심어 | 질문 | 논문에서 추출한 답변 |
|---|---|---|
| 곡물계 바이오매스의 문제점은? | 바이오매스를 이용한 바이오연료의 경우 원료 가격이 상당히 중요한 부분을 차지하는데 특히 생화학적 전환이 용이한 곡물계 바이오매스의 경우 식량으로도 이용되기 때문에 원료의 가격 부담이 매우 큰 편이다. 세계적으로 기아 문제가 여전히 심각한 상태에서 연료를 만들기 위해 곡물을 사용한다던가, 이로 인해 곡물 가격이 상승하여 절대 빈곤층의 식비 부담이 늘어나는 등의 도덕적 문제가 제기되고 있는 것이 사실이다. 또한 목질계 바이오매스의 경우 곡물에 비해 원료 단가가 낮지만 바이오 연료로 전환하는데 기술적인 어려움이 많은 것이 현실이다. | |
| 바이오매스의 특징은? | 한편, 앞의 노력 외에 연료나 화학물질의 원료로도 이용할 수 있는 바이오매스(biomass)를 이용한 연료 개발도 매우 다양하게 진행되고 있다. 바이오매스는 식물이나 미생물로 주로 구성되고 이를 생화학적, 물리적 변환 과정을 통해 바이오디젤, 바이오에탄올, 바이오가스 등의 바이오연료로 생산하는 기술이 상업화되어 있다. | |
| 혐기소화의 단점은? | 혐기소화는 슬러지의 감량과 안정화, 병원균 사멸, 그리고 에너지원으로 메탄을 얻는 장점이 있다. 그러나 한편으로 긴 슬러지 체류시간(20~30일)으로 인한 대규모 시설투자비, 낮은 유기물 분해 효율(30~50%)로 제약을 받는데 이는 주로 율속 단계인 가수분해에 기인한다. |
http://attfile.konetic.or.kr/konetic/xml/market/51A1A0720223.pdf
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