African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12269

Full Length Research Paper

Evaluation of methane production features and kinetics of Bougainvillea spectabilis Willd waste under mesophilic conditions

Xiyan Ji
  • Xiyan Ji
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Weidong Lin
  • Weidong Lin
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Wudi Zhang*
  • Wudi Zhang*
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Fang Yin
  • Fang Yin
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Xingling Zhao
  • Xingling Zhao
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Changmei Wang
  • Changmei Wang
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Jing Liu
  • Jing Liu
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Hong Yang
  • Hong Yang
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Yubao Chen
  • Yubao Chen
  • Yunnan Normal University, Kunming 650500, P. R. China.
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Shiqing Liu
  • Shiqing Liu
  • Yunnan Normal University, Kunming 650500, P. R. China.
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  •  Received: 16 March 2015
  •  Accepted: 15 May 2015
  •  Published: 03 June 2015

Abstract

The objective of this study was to investigate and evaluate the biomethane potential (BMP) of Bougainvillea spectabilis Willd waste in Yunnan, China, when subjected to mesophilic anaerobic digestion (AD). Three different categories of plant waste investigated were as follows: the flowers, leaves and stems of B. spectabilia. These three portions were assessed for their BMP in a laboratory-scale batch anaerobic digester for a period of 60 days at 30±0.1°C temperature. The results show that maximum daily methane yield of B. spectabilia’s flowers, leaves and stems were 65.95, 56.29 and 18.8 mL/(g.VS), respectively. Moreover, the research used substrate kinetics, including the Gompertz equation, the logistic equation and the transference function to analyze the AD process. All models fit the experimental data with R2>0.993. However, the Gompertz equation presented the best agreement in the fitting progress.
 
Key words: Bougainvillea spectabilis Willd, biomethane potential, anaerobic digestion, mathematical model.
 

Abbreviation

AD, Anaerobic digestion; BMP, biomethane potential; BSW, Bougainvillea spectabilis Willd; GHG, greenhouse Gas; TS, total solids; VS, volatile solids.