Earticle

초록

영어

Microbial fuel cells (MFCs) are bioelectrochemical devices which degrade organic substrate with help of consortia of micro-organisms as catalyst for electrogenesis in their anode; to produce electrical current. MFC power output is a function of many operating factors such as pH, temperature, loading rate, flow rate, and electrical load, which would define its state. However, the work presented here seeks to identify dynamic cause and effect relationships between key parameters and piecewise linearise the MFC process. A sandwich-type MFC was subjected to a varying electrical load of various Pseudo-Random and step inputs, while observing the MFC voltage. Nonlinear behaviour was inferred from assumed piecewise linearised first order dynamic responses, at different operating points. The time constants increased from 0.5 s with PRBS loading of 100 Ω – 150 Ω, to 6.2 s at 950 Ω – 1 kΩ; although steady state gain varied little, (0.12 mV Ω-1 to 0.20 mV Ω-1). This suggests that the MFC’s non-linear behaviour dependent on operating conditions may be adequately represented by a series of linear models. System Identification suggested that linear 4rd order ARX models had the best fit. However, reasonable prediction was observed using piecewise linearised first order models. The models could be used to design and optimize controllers to regulate power and/or voltage generation.

키워드

저자

• Jung Rae KIM [ School of Chemical and Biomolecular Engineering, Pusan National University, Busan, Korea, 609-735. ]
• Hitesh BOGHANI [ Sustainable Environment Research Centre (SERC), Faculty of Advanced Technology, University of Glamorgan, Pontypridd, Mid-Glamorgan, CF37 1DL, UK ]
• Richard DINSDALE [ Sustainable Environment Research Centre (SERC), Faculty of Health, Sport and Science, University of Glamorgan, Pontypridd, Mid-Glamorgan, CF37 1DL, UK. ]
• Alan GUWY [ Sustainable Environment Research Centre (SERC), Faculty of Health, Sport and Science, University of Glamorgan, Pontypridd, Mid-Glamorgan, CF37 1DL, UK. ]
• Giuliano PREMIER [ Sustainable Environment Research Centre (SERC), Faculty of Advanced Technology, University of Glamorgan, Pontypridd, Mid-Glamorgan, CF37 1DL, UK ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국생물공학회 학술대회

• 간기

  반년간

• 수록기간

  1985~2013

• 십진분류

  KDC 476 DDC 576