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하수처리장 바이오가스 생산 증대와 슬러지 감량화에 관한 기술분석: 슬러지 전처리 기술
Technology Trend on the Increase of Biogas Production and Sludge Reduction in Wastewater Treatment Plants: Sludge Pre-treatment Techniques 원문보기

Korean chemical engineering research = 화학공학, v.52 no.4, 2014년, pp.413 - 424  

조일형 (경기대학교 환경에너지공학과 하.폐수고도처리기술개발사업단) ,  고인범 (코오롱워터앤에너지(주)) ,  김지태 (경기대학교 환경에너지공학과 하.폐수고도처리기술개발사업단)

초록
AI-Helper 아이콘AI-Helper

에너지원으로 바이오가스에 대한 잠재적 가능성이 인식되면서 최근에 바이오가스의 생산기술을 제고하고 에너지 효율을 개선하기 위한 기술개발이 지속적으로 진행되고 있다. 본 논문의 목적은 혐기성 소화 과정에서 바이오가스 생산을 증가시키기 위한 효과적이고 효율적인 슬러지 전처리 방법에 대하여 분석하였다. 이를 위해 본 논문에서는 각각의 전처리 방법의 장점과 단점을 분석하여 바이오가스 생산에 미치는 영향요인을 비교 분석하였다.

Abstract ▼ AI-Helper 아이콘AI-Helper

The potential of using the biogas as energy source has long been widely recognised and current techniques are being developed to upgrade the technical quality and to enhance energy efficiency. The objective of this paper is to present efficient and effective pre-treatment methods of increasing the a...

주제어

#Biogas   #Pre-treatment   #Anaerobic Digestion   #Sludge  

질의응답

핵심어 질문 논문에서 추출한 답변
슬러지의 혐기성 소화와 바이오가스 생산량을 향상시키기 위하여 어떤 전처리 기술들을 이용할 수 있는가? 그간 다양한 슬러지 전처리 기술과 그들의 조합기술을 개발하여 슬러지의 혐기성 소화를 향상시키고 체류시간을 단축하여 바이오가스 생산량을 향상시키기 위한 연구들이 수행되었다. 주요 전처리 기술을 보면 물리적 방법으로 기계적 파괴[4] 및 초음파[5], 화학적 방법으로 열적가수분해[6], 오존[7]과 산/알칼리처리[8], 생물학적 전처리[9], 마이크로웨이브[10] 및 전자빔[11] 등 다양한 방법이 있다. 최근에는 효율을 더 높이기 위해 알칼리와 결합한 가압파쇄[12], 혹은 열가용화 혹은 열가수분해[13] 등 다양한 병합처리 기술이 개발되고 있다. 그러나 대부분의 전처리 기술들은 높은 초기 투자비와 운영비용, 낮은 살균력과 높은 에너지 비용 등의 단점을 노출하여 이를 해결하기 위한 실증연구들이 진행되고 있다.
이산화탄소보다 메탄이 지구 온난화 억제 효과가 더 큰 이유는 무엇인가? 바이오가스에서 발생되는 메탄을 이용하여 전기원이나 수송연료로 사용하는 경우 온실가스 저감 효과는 바이오디젤과 바이오에탄올 보다 크다. 또한 인위적 온실기체인 메탄은 온실효과에 미치는 지구온난화지수(global warming potential: GWP)가 이산화탄소 보다 21배나 높아 이를 배출하지 않고 활용하면 지구온난화 억제효과가 있다[14]. 2010년 기준 유럽의 바이오가스 생산량은 약 10.
지금까지 하수슬러지는 어떻게 처리되어 왔는가? 2008년 말 기준으로 347개 하수처리시설에서 약 7,446톤/일의 슬러지가 발생되던 것이 2013년 말 기준 10,946톤/일으로 32% 증가하였다[1]. 지금까지 하수슬러지는 해양투기, 육상 소각이나 매립방법으로 처리해왔다. 그러나 매립가용 부지가 부족하고 환경규제가 강화되는 여건에서 이러한 단순 처리 방식은 기술적으로, 경제적으로 효율적인 처리방법으로 보기 어려운 실정이다.
질의응답 정보가 도움이 되었나요?

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