Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Biodiesel Production and Nutrients Removal from Piggery Manure Using Microalgal Small Scale Raceway Pond (SSRP)

미세조류 옥외배양 시스템을 이용한 돈분 액체 비료의 영양염류 제거 및 바이오디젤 생산

  • Choi, Jong-Eun (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Kim, Byung-Hyuk (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Kang, Zion (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Oh, Hee-Mock (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Kim, Hee-Sik (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology)
  • 최종은 (한국생명공학연구원 환경바이오연구센터) ;
  • 김병혁 (한국생명공학연구원 환경바이오연구센터) ;
  • 강시온 (한국생명공학연구원 환경바이오연구센터) ;
  • 오희목 (한국생명공학연구원 환경바이오연구센터) ;
  • 김희식 (한국생명공학연구원 환경바이오연구센터)
  • Received : 2013.11.01
  • Accepted : 2013.12.24
  • Published : 2014.03.31
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Abstract

Due to the rapid energy consumption and fossil fuel abundance reduction, the world is progressively in need of alternative and renewable energy sources such as biodiesel. Biodiesel from microalgae offers high hopes to the scientific world for its potential as well as its non-competition with arable lands. Taking consideration to reduce the cost of production as well as to attain twin environmental goals of treatment and use of animal waste material the microalgal cultivation using piggery manure has been tested in this study. Unialgal strains such as Chlorella sp. JK2, Scenedesmus sp. JK10, and an indigenous mixed microalgal culture CSS were cultured for 20 days in diluted piggery manure using Small Scale Raceway Pond (SSRP). Biomass production and lipid productivity of CSS were $1.19{\pm}0.09gL^{-1}$, $12.44{\pm}0.38mgL^{-1}day^{-1}$, respectively and almost twice that of unialgal strains. Also, total nitrogen and total phosphorus removal efficiencies of CSS was 93.6% and 98.5% respectively and 30% higher removal efficiency compared to the use of unialgal strains. These results indicate that the piggery manure can provide microalgae necessary nitrogen and phosphorus for growth thereby effectively treating the manure. In addition, overall cost of microalgal cultivation and subsequently biodiesel production would be significantly reduced.

에너지 소비의 증가와 화석 연료의 감소로 인해 바이오디젤과 같은 재생 가능한 대체 에너지 자원이 관심을 받고 있다. 미세조류를 이용한 바이오디젤은 기존의 농작물과 경쟁하지 않는 것과 더불어 많은 장점을 갖고 있다. 본 연구에서는 미세조류 배양의 생산 비용 절감과 축산 폐수 처리라는 두 가지 목표를 충족시키지 위해 돈분 액체 비료를 사용하였다. 옥외 배양 시스템(Small Scale Raceway Pond; SSRP)과 희석된 돈분 액체 비료를 이용하여 단일 미세조류 Chlorella sp. JK2, Scenedesmus sp. JK10 과 혼합 토착 미세조류 CSS를 20일 동안 각각 배양하였다. 미세조류 혼합균주인 CSS의 바이오매스 생산과 지질 생산성은 각각 $1.19{\pm}0.09gL^{-1}$, $12.44{\pm}0.38mgL^{-1}day^{-1}$로 단일 종에 비해 2배 이상 높았다. 돈분 액체 비료의 TN, TP의 제거율 역시 혼합 토착 미세조류 CSS에서 93.6%, 98.5%로 단일 종의 이용에 비해 30%이상 높은 제거 효율을 보여주었다. 이를 통해 돈분 액체 비료는 미세조류 배양에 필요한 N과 P를 제공하며, 미세조류를 이용한 SSRP를 통하여 영양염류를 제거할 수 있는 가능성을 확인하였다. 또한 미세조류 배양을 위한 생산 비용의 감소로 경제성 있는 바이오디젤의 생산 가능성을 확인하였다.

Keywords

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